82 files changed, 3409 insertions, 2185 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index da49b006bcc5..b0243fd55ac0 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -42,7 +42,7 @@ if ACPI
 
 config ACPI_SLEEP
         bool
-        depends on PM_SLEEP
+        depends on SUSPEND || HIBERNATION
         default y
 
 config ACPI_PROCFS
@@ -157,18 +157,11 @@ config ACPI_FAN
           applications to perform basic fan control (on, off, status).
 
 config ACPI_DOCK
-        tristate "Dock"
+        bool "Dock"
         depends on EXPERIMENTAL
         help
-          This driver adds support for ACPI controlled docking stations
-
-config ACPI_BAY
-        tristate "Removable Drive Bay (EXPERIMENTAL)"
-        depends on EXPERIMENTAL
-        depends on ACPI_DOCK
-        help
-          This driver adds support for ACPI controlled removable drive
-          bays such as the IBM ultrabay or the Dell Module Bay.
+          This driver adds support for ACPI controlled docking stations and removable
+          drive bays such as the IBM ultrabay or the Dell Module Bay.
 
 config ACPI_PROCESSOR
         tristate "Processor"
@@ -319,9 +312,13 @@ config ACPI_DEBUG
         bool "Debug Statements"
         default n
         help
-          The ACPI driver can optionally report errors with a great deal
-          of verbosity. Saying Y enables these statements. This will increase
-          your kernel size by around 50K.
+          The ACPI subsystem can produce debug output.  Saying Y enables this
+          output and increases the kernel size by around 50K.
+
+          Use the acpi.debug_layer and acpi.debug_level kernel command-line
+          parameters documented in Documentation/acpi/debug.txt and
+          Documentation/kernel-parameters.txt to control the type and
+          amount of debug output.
 
 config ACPI_DEBUG_FUNC_TRACE
         bool "Additionally enable ACPI function tracing"
@@ -331,14 +328,6 @@ config ACPI_DEBUG_FUNC_TRACE
           ACPI Debug Statements slow down ACPI processing. Function trace
           is about half of the penalty and is rarely useful.
 
-config ACPI_EC
-        bool
-        default y
-        help
-          This driver is required on some systems for the proper operation of
-          the battery and thermal drivers.  If you are compiling for a 
-          mobile system, say Y.
-
 config ACPI_PCI_SLOT
         tristate "PCI slot detection driver"
         default n
@@ -348,10 +337,6 @@ config ACPI_PCI_SLOT
           help you correlate PCI bus addresses with the physical geography
           of your slots. If you are unsure, say N.
 
-config ACPI_POWER
-        bool
-        default y
-
 config ACPI_SYSTEM
         bool
         default y
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 52a4cd4b81d0..3c0c93300f12 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -39,20 +39,23 @@ obj-y				+= sleep/
 obj-y                           += bus.o glue.o
 obj-y                           += scan.o
 # Keep EC driver first. Initialization of others depend on it.
-obj-$(CONFIG_ACPI_EC)           += ec.o
+obj-y                           += ec.o
 obj-$(CONFIG_ACPI_AC)           += ac.o
 obj-$(CONFIG_ACPI_BATTERY)      += battery.o
 obj-$(CONFIG_ACPI_BUTTON)       += button.o
 obj-$(CONFIG_ACPI_FAN)          += fan.o
 obj-$(CONFIG_ACPI_DOCK)         += dock.o
-obj-$(CONFIG_ACPI_BAY)          += bay.o
 obj-$(CONFIG_ACPI_VIDEO)        += video.o
+ifdef CONFIG_ACPI_VIDEO
+obj-y                           += video_detect.o
+endif
+
 obj-y                           += pci_root.o pci_link.o pci_irq.o pci_bind.o
 obj-$(CONFIG_ACPI_PCI_SLOT)     += pci_slot.o
-obj-$(CONFIG_ACPI_POWER)        += power.o
 obj-$(CONFIG_ACPI_PROCESSOR)    += processor.o
 obj-$(CONFIG_ACPI_CONTAINER)    += container.o
 obj-$(CONFIG_ACPI_THERMAL)      += thermal.o
+obj-y                           += power.o
 obj-$(CONFIG_ACPI_SYSTEM)       += system.o event.o
 obj-$(CONFIG_ACPI_DEBUG)        += debug.o
 obj-$(CONFIG_ACPI_NUMA)         += numa.o
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 831883b7d6c9..9b917dac7732 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -37,7 +37,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_AC_COMPONENT               0x00020000
 #define ACPI_AC_CLASS                   "ac_adapter"
 #define ACPI_AC_DEVICE_NAME             "AC Adapter"
 #define ACPI_AC_FILE_STATE              "state"
@@ -85,7 +84,7 @@ struct acpi_ac {
         struct power_supply charger;
 #endif
         struct acpi_device * device;
-        unsigned long state;
+        unsigned long long state;
 };
 
 #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
@@ -242,7 +241,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
                 acpi_ac_get_state(ac);
                 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event,
+                                                  dev_name(&device->dev), event,
                                                   (u32) ac->state);
 #ifdef CONFIG_ACPI_SYSFS_POWER
                 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
@@ -269,7 +268,7 @@ static int acpi_ac_add(struct acpi_device *device)
         ac->device = device;
         strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_AC_CLASS);
-        acpi_driver_data(device) = ac;
+        device->driver_data = ac;
 
         result = acpi_ac_get_state(ac);
         if (result)
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 5f1127ad5a95..63a17b55b39b 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -32,7 +32,6 @@
 #include <linux/memory_hotplug.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_MEMORY_DEVICE_COMPONENT            0x08000000UL
 #define ACPI_MEMORY_DEVICE_CLASS                "memory"
 #define ACPI_MEMORY_DEVICE_HID                  "PNP0C80"
 #define ACPI_MEMORY_DEVICE_NAME                 "Hotplug Mem Device"
@@ -194,8 +193,7 @@ acpi_memory_get_device(acpi_handle handle,
 
 static int acpi_memory_check_device(struct acpi_memory_device *mem_device)
 {
-        unsigned long current_status;
-
+        unsigned long long current_status;
 
         /* Get device present/absent information from the _STA */
         if (ACPI_FAILURE(acpi_evaluate_integer(mem_device->device->handle, "_STA",
@@ -264,7 +262,7 @@ static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)
         acpi_status status;
         struct acpi_object_list arg_list;
         union acpi_object arg;
-        unsigned long current_status;
+        unsigned long long current_status;
 
 
         /* Issue the _EJ0 command */
@@ -403,7 +401,7 @@ static int acpi_memory_device_add(struct acpi_device *device)
         mem_device->device = device;
         sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);
         sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS);
-        acpi_driver_data(device) = mem_device;
+        device->driver_data = mem_device;
 
         /* Get the range from the _CRS */
         result = acpi_memory_get_device_resources(mem_device);
@@ -454,8 +452,8 @@ static int acpi_memory_device_start (struct acpi_device *device)
                 /* call add_memory func */
                 result = acpi_memory_enable_device(mem_device);
                 if (result)
-                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                "Error in acpi_memory_enable_device\n"));
+                        printk(KERN_ERR PREFIX
+                                "Error in acpi_memory_enable_device\n");
         }
         return result;
 }
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index d3d0886d637f..1e74988c7b2d 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -42,7 +42,7 @@
 
 #define ASUS_ACPI_VERSION "0.30"
 
-#define PROC_ASUS       "asus"  //the directory
+#define PROC_ASUS       "asus"  /* The directory */
 #define PROC_MLED       "mled"
 #define PROC_WLED       "wled"
 #define PROC_TLED       "tled"
@@ -66,10 +66,10 @@
 /*
  * Flags for hotk status
  */
-#define MLED_ON     0x01        //mail LED
-#define WLED_ON     0x02        //wireless LED
-#define TLED_ON     0x04        //touchpad LED
-#define BT_ON       0x08        //internal Bluetooth
+#define MLED_ON     0x01        /* Mail LED */
+#define WLED_ON     0x02        /* Wireless LED */
+#define TLED_ON     0x04        /* Touchpad LED */
+#define BT_ON       0x08        /* Internal Bluetooth */
 
 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
@@ -82,28 +82,28 @@ MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
 module_param(asus_gid, uint, 0);
 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
 
-/* For each model, all features implemented, 
+/* For each model, all features implemented,
  * those marked with R are relative to HOTK, A for absolute */
 struct model_data {
-        char *name;             //name of the laptop________________A
-        char *mt_mled;          //method to handle mled_____________R
-        char *mled_status;      //node to handle mled reading_______A
-        char *mt_wled;          //method to handle wled_____________R
-        char *wled_status;      //node to handle wled reading_______A
-        char *mt_tled;          //method to handle tled_____________R
-        char *tled_status;      //node to handle tled reading_______A
-        char *mt_ledd;          //method to handle LED display______R
-        char *mt_bt_switch;     //method to switch Bluetooth on/off_R
-        char *bt_status;        //no model currently supports this__?
-        char *mt_lcd_switch;    //method to turn LCD on/off_________A
-        char *lcd_status;       //node to read LCD panel state______A
-        char *brightness_up;    //method to set brightness up_______A
-        char *brightness_down;  //guess what ?______________________A
-        char *brightness_set;   //method to set absolute brightness_R
-        char *brightness_get;   //method to get absolute brightness_R
-        char *brightness_status;        //node to get brightness____________A
-        char *display_set;      //method to set video output________R
-        char *display_get;      //method to get video output________R
+        char *name;             /* name of the laptop________________A */
+        char *mt_mled;          /* method to handle mled_____________R */
+        char *mled_status;      /* node to handle mled reading_______A */
+        char *mt_wled;          /* method to handle wled_____________R */
+        char *wled_status;      /* node to handle wled reading_______A */
+        char *mt_tled;          /* method to handle tled_____________R */
+        char *tled_status;      /* node to handle tled reading_______A */
+        char *mt_ledd;          /* method to handle LED display______R */
+        char *mt_bt_switch;     /* method to switch Bluetooth on/off_R */
+        char *bt_status;        /* no model currently supports this__? */
+        char *mt_lcd_switch;    /* method to turn LCD on/off_________A */
+        char *lcd_status;       /* node to read LCD panel state______A */
+        char *brightness_up;    /* method to set brightness up_______A */
+        char *brightness_down;  /* method to set brightness down ____A */
+        char *brightness_set;   /* method to set absolute brightness_R */
+        char *brightness_get;   /* method to get absolute brightness_R */
+        char *brightness_status;/* node to get brightness____________A */
+        char *display_set;      /* method to set video output________R */
+        char *display_get;      /* method to get video output________R */
 };
 
 /*
@@ -111,41 +111,41 @@ struct model_data {
  * about the hotk device
  */
 struct asus_hotk {
-        struct acpi_device *device;     //the device we are in
-        acpi_handle handle;     //the handle of the hotk device
-        char status;            //status of the hotk, for LEDs, ...
-        u32 ledd_status;        //status of the LED display
-        struct model_data *methods;     //methods available on the laptop
-        u8 brightness;          //brightness level
+        struct acpi_device *device;     /* the device we are in */
+        acpi_handle handle;             /* the handle of the hotk device */
+        char status;                    /* status of the hotk, for LEDs */
+        u32 ledd_status;                /* status of the LED display */
+        struct model_data *methods;     /* methods available on the laptop */
+        u8 brightness;                  /* brightness level */
         enum {
-                A1x = 0,        //A1340D, A1300F
-                A2x,            //A2500H
-                A4G,            //A4700G
-                D1x,            //D1
-                L2D,            //L2000D
-                L3C,            //L3800C
-                L3D,            //L3400D
-                L3H,            //L3H, L2000E, L5D
-                L4R,            //L4500R
-                L5x,            //L5800C 
-                L8L,            //L8400L
-                M1A,            //M1300A
-                M2E,            //M2400E, L4400L
-                M6N,            //M6800N, W3400N
-                M6R,            //M6700R, A3000G
-                P30,            //Samsung P30
-                S1x,            //S1300A, but also L1400B and M2400A (L84F)
-                S2x,            //S200 (J1 reported), Victor MP-XP7210
-                W1N,            //W1000N
-                W5A,            //W5A
-                W3V,            //W3030V
-                xxN,            //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
-                A4S,            //Z81sp
-                //(Centrino)
-                F3Sa,
+                A1x = 0,        /* A1340D, A1300F */
+                A2x,            /* A2500H */
+                A4G,            /* A4700G */
+                D1x,            /* D1 */
+                L2D,            /* L2000D */
+                L3C,            /* L3800C */
+                L3D,            /* L3400D */
+                L3H,            /* L3H, L2000E, L5D */
+                L4R,            /* L4500R */
+                L5x,            /* L5800C */
+                L8L,            /* L8400L */
+                M1A,            /* M1300A */
+                M2E,            /* M2400E, L4400L */
+                M6N,            /* M6800N, W3400N */
+                M6R,            /* M6700R, A3000G */
+                P30,            /* Samsung P30 */
+                S1x,            /* S1300A, but also L1400B and M2400A (L84F) */
+                S2x,            /* S200 (J1 reported), Victor MP-XP7210 */
+                W1N,            /* W1000N */
+                W5A,            /* W5A */
+                W3V,            /* W3030V */
+                xxN,            /* M2400N, M3700N, M5200N, M6800N,
+                                                         S1300N, S5200N*/
+                A4S,            /* Z81sp */
+                F3Sa,           /* (Centrino) */
                 END_MODEL
-        } model;                //Models currently supported
-        u16 event_count[128];   //count for each event TODO make this better
+        } model;                /* Models currently supported */
+        u16 event_count[128];   /* Count for each event TODO make this better */
 };
 
 /* Here we go */
@@ -459,18 +459,18 @@ static struct acpi_driver asus_hotk_driver = {
                 },
 };
 
-/* 
+/*
  * This function evaluates an ACPI method, given an int as parameter, the
  * method is searched within the scope of the handle, can be NULL. The output
  * of the method is written is output, which can also be NULL
  *
- * returns 1 if write is successful, 0 else. 
+ * returns 1 if write is successful, 0 else.
  */
 static int write_acpi_int(acpi_handle handle, const char *method, int val,
                           struct acpi_buffer *output)
 {
-        struct acpi_object_list params; //list of input parameters (an int here)
-        union acpi_object in_obj;       //the only param we use
+        struct acpi_object_list params; /* list of input parameters (int) */
+        union acpi_object in_obj;       /* the only param we use */
         acpi_status status;
 
         params.count = 1;
@@ -507,18 +507,18 @@ proc_read_info(char *page, char **start, off_t off, int count, int *eof,
 {
         int len = 0;
         int temp;
-        char buf[16];           //enough for all info
+        char buf[16];           /* enough for all info */
         /*
-         * We use the easy way, we don't care of off and count, so we don't set eof
-         * to 1
+         * We use the easy way, we don't care of off and count,
+         * so we don't set eof to 1
          */
 
         len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
         len += sprintf(page + len, "Model reference    : %s\n",
                        hotk->methods->name);
-        /* 
-         * The SFUN method probably allows the original driver to get the list 
-         * of features supported by a given model. For now, 0x0100 or 0x0800 
+        /*
+         * The SFUN method probably allows the original driver to get the list
+         * of features supported by a given model. For now, 0x0100 or 0x0800
          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
          * The significance of others is yet to be found.
          */
@@ -528,7 +528,7 @@ proc_read_info(char *page, char **start, off_t off, int count, int *eof,
         /*
          * Another value for userspace: the ASYM method returns 0x02 for
          * battery low and 0x04 for battery critical, its readings tend to be
-         * more accurate than those provided by _BST. 
+         * more accurate than those provided by _BST.
          * Note: since not all the laptops provide this method, errors are
          * silently ignored.
          */
@@ -579,7 +579,7 @@ static int read_led(const char *ledname, int ledmask)
         return (hotk->status & ledmask) ? 1 : 0;
 }
 
-static int parse_arg(const char __user * buf, unsigned long count, int *val)
+static int parse_arg(const char __user *buf, unsigned long count, int *val)
 {
         char s[32];
         if (!count)
@@ -596,7 +596,7 @@ static int parse_arg(const char __user * buf, unsigned long count, int *val)
 
 /* FIXME: kill extraneous args so it can be called independently */
 static int
-write_led(const char __user * buffer, unsigned long count,
+write_led(const char __user *buffer, unsigned long count,
           char *ledname, int ledmask, int invert)
 {
         int rv, value;
@@ -631,7 +631,7 @@ proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_mled(struct file *file, const char __user * buffer,
+proc_write_mled(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
 {
         return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
@@ -648,7 +648,7 @@ proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_ledd(struct file *file, const char __user * buffer,
+proc_write_ledd(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
 {
         int rv, value;
@@ -677,7 +677,7 @@ proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_wled(struct file *file, const char __user * buffer,
+proc_write_wled(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
 {
         return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
@@ -694,10 +694,10 @@ proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_bluetooth(struct file *file, const char __user * buffer,
+proc_write_bluetooth(struct file *file, const char __user *buffer,
                      unsigned long count, void *data)
 {
-        /* Note: mt_bt_switch controls both internal Bluetooth adapter's 
+        /* Note: mt_bt_switch controls both internal Bluetooth adapter's
            presence and its LED */
         return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
 }
@@ -714,7 +714,7 @@ proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_tled(struct file *file, const char __user * buffer,
+proc_write_tled(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
 {
         return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
@@ -734,7 +734,7 @@ static int get_lcd_state(void)
 
                 input.count = 2;
                 input.pointer = mt_params;
-                /* Note: the following values are partly guessed up, but 
+                /* Note: the following values are partly guessed up, but
                    otherwise they seem to work */
                 mt_params[0].type = ACPI_TYPE_INTEGER;
                 mt_params[0].integer.value = 0x02;
@@ -753,7 +753,7 @@ static int get_lcd_state(void)
                         /* That's what the AML code does */
                         lcd = out_obj.integer.value >> 8;
         } else if (hotk->model == F3Sa) {
-                unsigned long tmp;
+                unsigned long long tmp;
                 union acpi_object param;
                 struct acpi_object_list input;
                 acpi_status status;
@@ -796,12 +796,13 @@ static int set_lcd_state(int value)
                             acpi_evaluate_object(NULL,
                                                  hotk->methods->mt_lcd_switch,
                                                  NULL, NULL);
-                } else {        /* L3H and the like have to be handled differently */
+                } else {
+                        /* L3H and the like must be handled differently */
                         if (!write_acpi_int
                             (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
                              NULL))
                                 status = AE_ERROR;
-                        /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress, 
+                        /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
                            the exact behaviour is simulated here */
                 }
                 if (ACPI_FAILURE(status))
@@ -819,7 +820,7 @@ proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_lcd(struct file *file, const char __user * buffer,
+proc_write_lcd(struct file *file, const char __user *buffer,
                unsigned long count, void *data)
 {
         int rv, value;
@@ -897,7 +898,7 @@ proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
 }
 
 static int
-proc_write_brn(struct file *file, const char __user * buffer,
+proc_write_brn(struct file *file, const char __user *buffer,
                unsigned long count, void *data)
 {
         int rv, value;
@@ -921,7 +922,7 @@ static void set_display(int value)
 }
 
 /*
- * Now, *this* one could be more user-friendly, but so far, no-one has 
+ * Now, *this* one could be more user-friendly, but so far, no-one has
  * complained. The significance of bits is the same as in proc_write_disp()
  */
 static int
@@ -933,18 +934,18 @@ proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
         if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
                 printk(KERN_WARNING
                        "Asus ACPI: Error reading display status\n");
-        value &= 0x07;          /* needed for some models, shouldn't hurt others */
+        value &= 0x07;  /* needed for some models, shouldn't hurt others */
         return sprintf(page, "%d\n", value);
 }
 
 /*
- * Experimental support for display switching. As of now: 1 should activate 
- * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination 
- * (bitwise) of these will suffice. I never actually tested 3 displays hooked up 
- * simultaneously, so be warned. See the acpi4asus README for more info.
+ * Experimental support for display switching. As of now: 1 should activate
+ * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
+ * (bitwise) of these will suffice. I never actually tested 3 displays hooked
+ * up simultaneously, so be warned. See the acpi4asus README for more info.
  */
 static int
-proc_write_disp(struct file *file, const char __user * buffer,
+proc_write_disp(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
 {
         int rv, value;
@@ -957,12 +958,12 @@ proc_write_disp(struct file *file, const char __user * buffer,
 
 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
                              int *eof, void *data);
-typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
+typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
                               unsigned long count, void *data);
 
 static int
-asus_proc_add(char *name, proc_writefunc * writefunc,
-                     proc_readfunc * readfunc, mode_t mode,
+asus_proc_add(char *name, proc_writefunc *writefunc,
+                     proc_readfunc *readfunc, mode_t mode,
                      struct acpi_device *device)
 {
         struct proc_dir_entry *proc =
@@ -1040,9 +1041,9 @@ static int asus_hotk_add_fs(struct acpi_device *device)
                               &proc_read_bluetooth, mode, device);
         }
 
-        /* 
-         * We need both read node and write method as LCD switch is also accessible
-         * from keyboard 
+        /*
+         * We need both read node and write method as LCD switch is also
+         * accessible from the keyboard
          */
         if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
                 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
@@ -1096,11 +1097,10 @@ static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
         if (!hotk)
                 return;
 
-        if ((event & ~((u32) BR_UP)) < 16) {
+        if ((event & ~((u32) BR_UP)) < 16)
                 hotk->brightness = (event & ~((u32) BR_UP));
-        } else if ((event & ~((u32) BR_DOWN)) < 16) {
+        else if ((event & ~((u32) BR_DOWN)) < 16)
                 hotk->brightness = (event & ~((u32) BR_DOWN));
-        }
 
         acpi_bus_generate_proc_event(hotk->device, event,
                                 hotk->event_count[event % 128]++);
@@ -1186,8 +1186,8 @@ static int asus_hotk_get_info(void)
         acpi_status status;
 
         /*
-         * Get DSDT headers early enough to allow for differentiating between 
-         * models, but late enough to allow acpi_bus_register_driver() to fail 
+         * Get DSDT headers early enough to allow for differentiating between
+         * models, but late enough to allow acpi_bus_register_driver() to fail
          * before doing anything ACPI-specific. Should we encounter a machine,
          * which needs special handling (i.e. its hotkey device has a different
          * HID), this bit will be moved. A global variable asus_info contains
@@ -1212,8 +1212,8 @@ static int asus_hotk_get_info(void)
 
         /*
          * Try to match the object returned by INIT to the specific model.
-         * Handle every possible object (or the lack of thereof) the DSDT 
-         * writers might throw at us. When in trouble, we pass NULL to 
+         * Handle every possible object (or the lack of thereof) the DSDT
+         * writers might throw at us. When in trouble, we pass NULL to
          * asus_model_match() and try something completely different.
          */
         if (buffer.pointer) {
@@ -1244,6 +1244,8 @@ static int asus_hotk_get_info(void)
                                "default values\n", string);
                         printk(KERN_NOTICE
                                "  send /proc/acpi/dsdt to the developers\n");
+                        kfree(model);
+                        return -ENODEV;
                 }
                 hotk->methods = &model_conf[hotk->model];
                 return AE_OK;
@@ -1254,7 +1256,7 @@ static int asus_hotk_get_info(void)
         /* Sort of per-model blacklist */
         if (strncmp(string, "L2B", 3) == 0)
                 hotk->methods->lcd_status = NULL;
-        /* L2B is similar enough to L3C to use its settings, with this only 
+        /* L2B is similar enough to L3C to use its settings, with this only
            exception */
         else if (strncmp(string, "A3G", 3) == 0)
                 hotk->methods->lcd_status = "\\BLFG";
@@ -1321,7 +1323,7 @@ static int asus_hotk_add(struct acpi_device *device)
         hotk->handle = device->handle;
         strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
-        acpi_driver_data(device) = hotk;
+        device->driver_data = hotk;
         hotk->device = device;
 
         result = asus_hotk_check();
@@ -1366,10 +1368,9 @@ static int asus_hotk_add(struct acpi_device *device)
         /* LED display is off by default */
         hotk->ledd_status = 0xFFF;
 
-      end:
-        if (result) {
+end:
+        if (result)
                 kfree(hotk);
-        }
 
         return result;
 }
@@ -1394,8 +1395,8 @@ static int asus_hotk_remove(struct acpi_device *device, int type)
 }
 
 static struct backlight_ops asus_backlight_data = {
-        .get_brightness = read_brightness,
-        .update_status  = set_brightness_status,
+        .get_brightness = read_brightness,
+        .update_status  = set_brightness_status,
 };
 
 static void asus_acpi_exit(void)
@@ -1442,15 +1443,15 @@ static int __init asus_acpi_init(void)
                 return -ENODEV;
         }
 
-        asus_backlight_device = backlight_device_register("asus",NULL,NULL,
+        asus_backlight_device = backlight_device_register("asus", NULL, NULL,
                                                           &asus_backlight_data);
-        if (IS_ERR(asus_backlight_device)) {
+        if (IS_ERR(asus_backlight_device)) {
                 printk(KERN_ERR "Could not register asus backlight device\n");
                 asus_backlight_device = NULL;
                 asus_acpi_exit();
                 return -ENODEV;
         }
-        asus_backlight_device->props.max_brightness = 15;
+        asus_backlight_device->props.max_brightness = 15;
 
         return 0;
 }
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 70f7f60929ca..1423b0c0cd2e 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -46,7 +46,6 @@
 
 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
 
-#define ACPI_BATTERY_COMPONENT          0x00040000
 #define ACPI_BATTERY_CLASS              "battery"
 #define ACPI_BATTERY_DEVICE_NAME        "Battery"
 #define ACPI_BATTERY_NOTIFY_STATUS      0x80
@@ -782,7 +781,7 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
         acpi_bus_generate_proc_event(device, event,
                                      acpi_battery_present(battery));
         acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                        device->dev.bus_id, event,
+                                        dev_name(&device->dev), event,
                                         acpi_battery_present(battery));
 #ifdef CONFIG_ACPI_SYSFS_POWER
         /* acpi_batter_update could remove power_supply object */
@@ -804,7 +803,7 @@ static int acpi_battery_add(struct acpi_device *device)
         battery->device = device;
         strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
-        acpi_driver_data(device) = battery;
+        device->driver_data = battery;
         mutex_init(&battery->lock);
         acpi_battery_update(battery);
 #ifdef CONFIG_ACPI_PROCFS_POWER
diff --git a/drivers/acpi/bay.c b/drivers/acpi/bay.c
deleted file mode 100644
index 61b6c5beb2d3..000000000000
--- a/drivers/acpi/bay.c
+++ /dev/null
@@ -1,411 +0,0 @@
-/*
- *  bay.c - ACPI removable drive bay driver
- *
- *  Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or (at
- *  your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful, but
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/notifier.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
-#include <linux/seq_file.h>
-#include <asm/uaccess.h>
-#include <linux/platform_device.h>
-
-ACPI_MODULE_NAME("bay");
-MODULE_AUTHOR("Kristen Carlson Accardi");
-MODULE_DESCRIPTION("ACPI Removable Drive Bay Driver");
-MODULE_LICENSE("GPL");
-#define ACPI_BAY_CLASS "bay"
-#define ACPI_BAY_COMPONENT      0x10000000
-#define _COMPONENT ACPI_BAY_COMPONENT
-#define bay_dprintk(h,s) {\
-        char prefix[80] = {'\0'};\
-        struct acpi_buffer buffer = {sizeof(prefix), prefix};\
-        acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\
-        printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); }
-static void bay_notify(acpi_handle handle, u32 event, void *data);
-
-static const struct acpi_device_id bay_device_ids[] = {
-        {"LNXIOBAY", 0},
-        {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, bay_device_ids);
-
-struct bay {
-        acpi_handle handle;
-        char *name;
-        struct list_head list;
-        struct platform_device *pdev;
-};
-
-static LIST_HEAD(drive_bays);
-
-
-/*****************************************************************************
- *                         Drive Bay functions                               *
- *****************************************************************************/
-/**
- * is_ejectable - see if a device is ejectable
- * @handle: acpi handle of the device
- *
- * If an acpi object has a _EJ0 method, then it is ejectable
- */
-static int is_ejectable(acpi_handle handle)
-{
-        acpi_status status;
-        acpi_handle tmp;
-
-        status = acpi_get_handle(handle, "_EJ0", &tmp);
-        if (ACPI_FAILURE(status))
-                return 0;
-        return 1;
-}
-
-/**
- * bay_present - see if the bay device is present
- * @bay: the drive bay
- *
- * execute the _STA method.
- */
-static int bay_present(struct bay *bay)
-{
-        unsigned long sta;
-        acpi_status status;
-
-        if (bay) {
-                status = acpi_evaluate_integer(bay->handle, "_STA", NULL, &sta);
-                if (ACPI_SUCCESS(status) && sta)
-                        return 1;
-        }
-        return 0;
-}
-
-/**
- * eject_device - respond to an eject request
- * @handle - the device to eject
- *
- * Call this devices _EJ0 method.
- */
-static void eject_device(acpi_handle handle)
-{
-        struct acpi_object_list arg_list;
-        union acpi_object arg;
-
-        bay_dprintk(handle, "Ejecting device");
-
-        arg_list.count = 1;
-        arg_list.pointer = &arg;
-        arg.type = ACPI_TYPE_INTEGER;
-        arg.integer.value = 1;
-
-        if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0",
-                                              &arg_list, NULL)))
-                pr_debug("Failed to evaluate _EJ0!\n");
-}
-
-/*
- * show_present - read method for "present" file in sysfs
- */
-static ssize_t show_present(struct device *dev,
-                           struct device_attribute *attr, char *buf)
-{
-        struct bay *bay = dev_get_drvdata(dev);
-        return snprintf(buf, PAGE_SIZE, "%d\n", bay_present(bay));
-
-}
-static DEVICE_ATTR(present, S_IRUGO, show_present, NULL);
-
-/*
- * write_eject - write method for "eject" file in sysfs
- */
-static ssize_t write_eject(struct device *dev, struct device_attribute *attr,
-                           const char *buf, size_t count)
-{
-        struct bay *bay = dev_get_drvdata(dev);
-
-        if (!count)
-                return -EINVAL;
-
-        eject_device(bay->handle);
-        return count;
-}
-static DEVICE_ATTR(eject, S_IWUSR, NULL, write_eject);
-
-/**
- * is_ata - see if a device is an ata device
- * @handle: acpi handle of the device
- *
- * If an acpi object has one of 4 ATA ACPI methods defined,
- * then it is an ATA device
- */
-static int is_ata(acpi_handle handle)
-{
-        acpi_handle tmp;
-
-        if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-                return 1;
-
-        return 0;
-}
-
-/**
- * parent_is_ata(acpi_handle handle)
- *
- */
-static int parent_is_ata(acpi_handle handle)
-{
-        acpi_handle phandle;
-
-        if (acpi_get_parent(handle, &phandle))
-                return 0;
-
-        return is_ata(phandle);
-}
-
-/**
- * is_ejectable_bay - see if a device is an ejectable drive bay
- * @handle: acpi handle of the device
- *
- * If an acpi object is ejectable and has one of the ACPI ATA
- * methods defined, then we can safely call it an ejectable
- * drive bay
- */
-static int is_ejectable_bay(acpi_handle handle)
-{
-        if ((is_ata(handle) || parent_is_ata(handle)) && is_ejectable(handle))
-                return 1;
-        return 0;
-}
-
-#if 0
-/**
- * eject_removable_drive - try to eject this drive
- * @dev : the device structure of the drive
- *
- * If a device is a removable drive that requires an _EJ0 method
- * to be executed in order to safely remove from the system, do
- * it.  ATM - always returns success
- */
-int eject_removable_drive(struct device *dev)
-{
-        acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
-
-        if (handle) {
-                bay_dprintk(handle, "Got device handle");
-                if (is_ejectable_bay(handle))
-                        eject_device(handle);
-        } else {
-                printk("No acpi handle for device\n");
-        }
-
-        /* should I return an error code? */
-        return 0;
-}
-EXPORT_SYMBOL_GPL(eject_removable_drive);
-#endif  /*  0  */
-
-static int acpi_bay_add_fs(struct bay *bay)
-{
-        int ret;
-        struct device *dev = &bay->pdev->dev;
-
-        ret = device_create_file(dev, &dev_attr_present);
-        if (ret)
-                goto add_fs_err;
-        ret = device_create_file(dev, &dev_attr_eject);
-        if (ret) {
-                device_remove_file(dev, &dev_attr_present);
-                goto add_fs_err;
-        }
-        return 0;
-
- add_fs_err:
-        bay_dprintk(bay->handle, "Error adding sysfs files\n");
-        return ret;
-}
-
-static void acpi_bay_remove_fs(struct bay *bay)
-{
-        struct device *dev = &bay->pdev->dev;
-
-        /* cleanup sysfs */
-        device_remove_file(dev, &dev_attr_present);
-        device_remove_file(dev, &dev_attr_eject);
-}
-
-static int bay_is_dock_device(acpi_handle handle)
-{
-        acpi_handle parent;
-
-        acpi_get_parent(handle, &parent);
-
-        /* if the device or it's parent is dependent on the
-         * dock, then we are a dock device
-         */
-        return (is_dock_device(handle) || is_dock_device(parent));
-}
-
-static int bay_add(acpi_handle handle, int id)
-{
-        acpi_status status;
-        struct bay *new_bay;
-        struct platform_device *pdev;
-        struct acpi_buffer nbuffer = {ACPI_ALLOCATE_BUFFER, NULL};
-        acpi_get_name(handle, ACPI_FULL_PATHNAME, &nbuffer);
-
-        bay_dprintk(handle, "Adding notify handler");
-
-        /*
-         * Initialize bay device structure
-         */
-        new_bay = kzalloc(sizeof(*new_bay), GFP_ATOMIC);
-        INIT_LIST_HEAD(&new_bay->list);
-        new_bay->handle = handle;
-        new_bay->name = (char *)nbuffer.pointer;
-
-        /* initialize platform device stuff */
-        pdev = platform_device_register_simple(ACPI_BAY_CLASS, id, NULL, 0);
-        if (IS_ERR(pdev)) {
-                printk(KERN_ERR PREFIX "Error registering bay device\n");
-                goto bay_add_err;
-        }
-        new_bay->pdev = pdev;
-        platform_set_drvdata(pdev, new_bay);
-
-        /*
-         * we want the bay driver to be able to send uevents
-         */
-        pdev->dev.uevent_suppress = 0;
-
-        /* register for events on this device */
-        status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
-                        bay_notify, new_bay);
-        if (ACPI_FAILURE(status)) {
-                printk(KERN_INFO PREFIX "Error installing bay notify handler\n");
-                platform_device_unregister(new_bay->pdev);
-                goto bay_add_err;
-        }
-
-        if (acpi_bay_add_fs(new_bay)) {
-                acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
-                                           bay_notify);
-                platform_device_unregister(new_bay->pdev);
-                goto bay_add_err;
-        }
-
-        /* if we are on a dock station, we should register for dock
-         * notifications.
-         */
-        if (bay_is_dock_device(handle)) {
-                bay_dprintk(handle, "Is dependent on dock\n");
-                register_hotplug_dock_device(handle, bay_notify, new_bay);
-        }
-        list_add(&new_bay->list, &drive_bays);
-        printk(KERN_INFO PREFIX "Bay [%s] Added\n", new_bay->name);
-        return 0;
-
-bay_add_err:
-        kfree(new_bay->name);
-        kfree(new_bay);
-        return -ENODEV;
-}
-
-/**
- * bay_notify - act upon an acpi bay notification
- * @handle: the bay handle
- * @event: the acpi event
- * @data: our driver data struct
- *
- */
-static void bay_notify(acpi_handle handle, u32 event, void *data)
-{
-        struct bay *bay_dev = (struct bay *)data;
-        struct device *dev = &bay_dev->pdev->dev;
-        char event_string[12];
-        char *envp[] = { event_string, NULL };
-
-        bay_dprintk(handle, "Bay event");
-        sprintf(event_string, "BAY_EVENT=%d", event);
-        kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
-}
-
-static acpi_status
-find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
-        int *count = (int *)context;
-
-        /*
-         * there could be more than one ejectable bay.
-         * so, just return AE_OK always so that every object
-         * will be checked.
-         */
-        if (is_ejectable_bay(handle)) {
-                bay_dprintk(handle, "found ejectable bay");
-                if (!bay_add(handle, *count))
-                        (*count)++;
-        }
-        return AE_OK;
-}
-
-static int __init bay_init(void)
-{
-        int bays = 0;
-
-        INIT_LIST_HEAD(&drive_bays);
-
-        if (acpi_disabled)
-                return -ENODEV;
-
-        /* look for dockable drive bays */
-        acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
-                ACPI_UINT32_MAX, find_bay, &bays, NULL);
-
-        if (!bays)
-                return -ENODEV;
-
-        return 0;
-}
-
-static void __exit bay_exit(void)
-{
-        struct bay *bay, *tmp;
-
-        list_for_each_entry_safe(bay, tmp, &drive_bays, list) {
-                if (is_dock_device(bay->handle))
-                        unregister_hotplug_dock_device(bay->handle);
-                acpi_bay_remove_fs(bay);
-                acpi_remove_notify_handler(bay->handle, ACPI_SYSTEM_NOTIFY,
-                        bay_notify);
-                platform_device_unregister(bay->pdev);
-                kfree(bay->name);
-                kfree(bay);
-        }
-}
-
-postcore_initcall(bay_init);
-module_exit(bay_exit);
-
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index ea92bac42c53..09c69806c1fc 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -176,16 +176,6 @@ static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
         acpi_dmi_osi_linux(1, d);       /* enable */
         return 0;
 }
-static int __init dmi_disable_osi_linux(const struct dmi_system_id *d)
-{
-        acpi_dmi_osi_linux(0, d);       /* disable */
-        return 0;
-}
-static int __init dmi_unknown_osi_linux(const struct dmi_system_id *d)
-{
-        acpi_dmi_osi_linux(-1, d);      /* unknown */
-        return 0;
-}
 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
 {
         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
@@ -193,295 +183,21 @@ static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
         return 0;
 }
 
-/*
- * Most BIOS that invoke OSI(Linux) do nothing with it.
- * But some cause Linux to break.
- * Only a couple use it to make Linux run better.
- *
- * Thus, Linux should continue to disable OSI(Linux) by default,
- * should continue to discourage BIOS writers from using it, and
- * should whitelist the few existing systems that require it.
- *
- * If it appears clear a vendor isn't using OSI(Linux)
- * for anything constructive, blacklist them by name to disable
- * unnecessary dmesg warnings on all of their products.
- */
-
 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
-        /*
-         * Disable OSI(Linux) warnings on all "Acer, inc."
-         *
-         * _OSI(Linux) disables the latest Windows BIOS code:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5050"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5580"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 3010"),
-         * _OSI(Linux) effect unknown:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Ferrari 5000"),
-         */
-        /*
-         * note that dmi_check_system() uses strstr()
-         * to match sub-strings rather than !strcmp(),
-         * so "Acer" below matches "Acer, inc." above.
-         */
-        /*
-         * Disable OSI(Linux) warnings on all "Acer"
-         *
-         * _OSI(Linux) effect unknown:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720Z"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5520"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 6460"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 7510"),
-         *
-         * _OSI(Linux) is a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5220"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Acer",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "Apple Computer, Inc."
-         * Disable OSI(Linux) warnings on all "Apple Inc."
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBook2,1"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,2"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"),
-         * _OSI(Linux) effect unknown:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacPro2,1"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,1"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Apple",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "BenQ"
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Joybook S31"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "BenQ",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "BenQ"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "Clevo Co."
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "M570RU"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Clevo",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "COMPAL"
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_BOARD_NAME, "HEL8X"),
-         * _OSI(Linux) unknown effect:
-         * DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Compal",
-        .matches = {
-                     DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
-                },
-        },
-        { /* OSI(Linux) touches USB, unknown side-effect */
-        .callback = dmi_disable_osi_linux,
-        .ident = "Dell Dimension 5150",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM051"),
-                },
-        },
-        { /* OSI(Linux) is a NOP */
-        .callback = dmi_disable_osi_linux,
-        .ident = "Dell i1501",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1501"),
-                },
-        },
-        { /* OSI(Linux) effect unknown */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell Latitude D830",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D830"),
-                },
-        },
-        { /* OSI(Linux) effect unknown */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell OptiPlex GX620",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX620"),
-                },
-        },
-        { /* OSI(Linux) causes some USB initialization to not run */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell OptiPlex 755",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 755"),
-                },
-        },
-        { /* OSI(Linux) effect unknown */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell PE 1900",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1900"),
-                },
-        },
-        { /* OSI(Linux) is a NOP */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell PE 1950",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
-                },
-        },
-        { /* OSI(Linux) is a NOP */
-        .callback = dmi_disable_osi_linux,
-        .ident = "Dell PE R200",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R200"),
-                },
-        },
-        { /* OSI(Linux) touches USB */
-        .callback = dmi_disable_osi_linux,
-        .ident = "Dell PR 390",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation 390"),
-                },
-        },
-        { /* OSI(Linux) touches USB */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell PR 390",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation 690"),
-                },
-        },
-        { /* OSI(Linux) unknown - ASL looks benign, but may effect dock/SMM */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell PR M4300",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Precision M4300"),
-                },
-        },
-        { /* OSI(Linux) is a NOP */
-        .callback = dmi_disable_osi_linux,
-        .ident = "Dell Vostro 1000",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Vostro   1000"),
-                },
-        },
-        { /* OSI(Linux) effect unknown */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dell PE SC440",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge SC440"),
-                },
-        },
-        { /* OSI(Linux) effect unknown */
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Dialogue Flybook V5",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Dialogue Technology Corporation"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Flybook V5"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "FUJITSU SIEMENS"
-         *
-         * _OSI(Linux) disables latest Windows BIOS code:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pa 2510"),
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 1536"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 1556"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 1546"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
-         * _OSI(Linux) unknown effect:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Amilo M1425"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Amilo Si 1520"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Fujitsu Siemens",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
-                },
-        },
         {
         .callback = dmi_disable_osi_vista,
         .ident = "Fujitsu Siemens",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
+                     DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
                 },
         },
+
         /*
-         * Disable OSI(Linux) warnings on all "Hewlett-Packard"
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * .ident = "HP Pavilion tx 1000"
-         * DMI_MATCH(DMI_BOARD_NAME, "30BF"),
-         * .ident = "HP Pavilion dv2000"
-         * DMI_MATCH(DMI_BOARD_NAME, "30B5"),
-         * .ident = "HP Pavilion dv5000",
-         * DMI_MATCH(DMI_BOARD_NAME, "30A7"),
-         * .ident = "HP Pavilion dv6300 30BC",
-         * DMI_MATCH(DMI_BOARD_NAME, "30BC"),
-         * .ident = "HP Pavilion dv6000",
-         * DMI_MATCH(DMI_BOARD_NAME, "30B7"),
-         * DMI_MATCH(DMI_BOARD_NAME, "30B8"),
-         * .ident = "HP Pavilion dv9000",
-         * DMI_MATCH(DMI_BOARD_NAME, "30B9"),
-         * .ident = "HP Pavilion dv9500",
-         * DMI_MATCH(DMI_BOARD_NAME, "30CB"),
-         * .ident = "HP/Compaq Presario C500",
-         * DMI_MATCH(DMI_BOARD_NAME, "30C6"),
-         * .ident = "HP/Compaq Presario F500",
-         * DMI_MATCH(DMI_BOARD_NAME, "30D3"),
-         * _OSI(Linux) unknown effect:
-         * .ident = "HP Pavilion dv6500",
-         * DMI_MATCH(DMI_BOARD_NAME, "30D0"),
+         * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
+         * Linux ignores it, except for the machines enumerated below.
          */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Hewlett-Packard",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-                },
-        },
+
         /*
          * Lenovo has a mix of systems OSI(Linux) situations
          * and thus we can not wildcard the vendor.
@@ -519,113 +235,6 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
                 },
         },
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Lenovo 3000 V100",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-                     DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"),
-                },
-        },
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Lenovo 3000 N100",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-                     DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "LG Electronics"
-         *
-         * _OSI(Linux) confirmed to be a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "P1-J150B"),
-         * with DMI_MATCH(DMI_BOARD_NAME, "ROCKY"),
-         *
-         * unknown:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "S1-MDGDG"),
-         * with DMI_MATCH(DMI_BOARD_NAME, "ROCKY"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "LG",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
-                },
-        },
-        /* NEC - OSI(Linux) effect unknown */
-        {
-        .callback = dmi_unknown_osi_linux,
-        .ident = "NEC VERSA M360",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "NEC Computers SAS"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "NEC VERSA M360"),
-                },
-        },
-        /* Panasonic */
-        {
-        .callback = dmi_unknown_osi_linux,
-        .ident = "Panasonic",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
-                        /* Toughbook CF-52 */
-                     DMI_MATCH(DMI_PRODUCT_NAME, "CF-52CCABVBG"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "Samsung Electronics"
-         *
-         * OSI(Linux) disables PNP0C32 and other BIOS code for Windows:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "R40P/R41P"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "R59P/R60P/R61P"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Samsung",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "Sony Corporation"
-         *
-         * _OSI(Linux) is a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NR11S_S"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SZ38GP_C"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SZ650N"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-TZ21MN_N"),
-         * _OSI(Linux) unknown effect:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FZ11M"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Sony",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
-                },
-        },
-        /*
-         * Disable OSI(Linux) warnings on all "TOSHIBA"
-         *
-         * _OSI(Linux) breaks sound (bugzilla 7787):
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P100"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P105"),
-         * _OSI(Linux) is a NOP:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A100"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A210"),
-         * _OSI(Linux) unknown effect:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A135"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A200"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P205"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U305"),
-         */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Toshiba",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-                },
-        },
         {}
 };
 
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index ccae305ee55d..7edf6d913c13 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -48,6 +48,23 @@ EXPORT_SYMBOL(acpi_root_dir);
 
 #define STRUCT_TO_INT(s)        (*((int*)&s))
 
+static int set_power_nocheck(const struct dmi_system_id *id)
+{
+        printk(KERN_NOTICE PREFIX "%s detected - "
+                "disable power check in power transistion\n", id->ident);
+        acpi_power_nocheck = 1;
+        return 0;
+}
+static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
+        {
+        set_power_nocheck, "HP Pavilion 05", {
+        DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
+        DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"),
+        DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL},
+        {},
+};
+
+
 /* --------------------------------------------------------------------------
                                 Device Management
    -------------------------------------------------------------------------- */
@@ -77,7 +94,7 @@ EXPORT_SYMBOL(acpi_bus_get_device);
 int acpi_bus_get_status(struct acpi_device *device)
 {
         acpi_status status = AE_OK;
-        unsigned long sta = 0;
+        unsigned long long sta = 0;
 
 
         if (!device)
@@ -95,21 +112,21 @@ int acpi_bus_get_status(struct acpi_device *device)
         }
 
         /*
-         * Otherwise we assume the status of our parent (unless we don't
-         * have one, in which case status is implied).
+         * According to ACPI spec some device can be present and functional
+         * even if the parent is not present but functional.
+         * In such conditions the child device should not inherit the status
+         * from the parent.
          */
-        else if (device->parent)
-                device->status = device->parent->status;
         else
                 STRUCT_TO_INT(device->status) =
                     ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
                     ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
 
         if (device->status.functional && !device->status.present) {
-                printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: "
-                       "functional but not present; setting present\n",
-                       device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status));
-                device->status.present = 1;
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
+                       "functional but not present;\n",
+                        device->pnp.bus_id,
+                        (u32) STRUCT_TO_INT(device->status)));
         }
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
@@ -155,7 +172,7 @@ int acpi_bus_get_power(acpi_handle handle, int *state)
         int result = 0;
         acpi_status status = 0;
         struct acpi_device *device = NULL;
-        unsigned long psc = 0;
+        unsigned long long psc = 0;
 
 
         result = acpi_bus_get_device(handle, &device);
@@ -223,7 +240,19 @@ int acpi_bus_set_power(acpi_handle handle, int state)
         /*
          * Get device's current power state
          */
-        acpi_bus_get_power(device->handle, &device->power.state);
+        if (!acpi_power_nocheck) {
+                /*
+                 * Maybe the incorrect power state is returned on the bogus
+                 * bios, which is different with the real power state.
+                 * For example: the bios returns D0 state and the real power
+                 * state is D3. OS expects to set the device to D0 state. In
+                 * such case if OS uses the power state returned by the BIOS,
+                 * the device can't be transisted to the correct power state.
+                 * So if the acpi_power_nocheck is set, it is unnecessary to
+                 * get the power state by calling acpi_bus_get_power.
+                 */
+                acpi_bus_get_power(device->handle, &device->power.state);
+        }
         if ((state == device->power.state) && !device->flags.force_power_state) {
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
                                   state));
@@ -496,6 +525,19 @@ static int acpi_bus_check_scope(struct acpi_device *device)
         return 0;
 }
 
+static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
+int register_acpi_bus_notifier(struct notifier_block *nb)
+{
+        return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
+
+void unregister_acpi_bus_notifier(struct notifier_block *nb)
+{
+        blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
+
 /**
  * acpi_bus_notify
  * ---------------
@@ -506,6 +548,8 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
         int result = 0;
         struct acpi_device *device = NULL;
 
+        blocking_notifier_call_chain(&acpi_bus_notify_list,
+                type, (void *)handle);
 
         if (acpi_bus_get_device(handle, &device))
                 return;
@@ -644,6 +688,14 @@ void __init acpi_early_init(void)
         if (acpi_disabled)
                 return;
 
+        /*
+         * ACPI CA initializes acpi_dbg_level to non-zero, which means
+         * we get debug output merely by turning on CONFIG_ACPI_DEBUG.
+         * Turn it off so we don't get output unless the user specifies
+         * acpi.debug_level.
+         */
+        acpi_dbg_level = 0;
+
         printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
 
         /* enable workarounds, unless strict ACPI spec. compliance */
@@ -730,7 +782,7 @@ static int __init acpi_bus_init(void)
                        "Unable to initialize ACPI OS objects\n");
                 goto error1;
         }
-#ifdef CONFIG_ACPI_EC
+
         /*
          * ACPI 2.0 requires the EC driver to be loaded and work before
          * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
@@ -741,7 +793,6 @@ static int __init acpi_bus_init(void)
          */
         status = acpi_ec_ecdt_probe();
         /* Ignore result. Not having an ECDT is not fatal. */
-#endif
 
         status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
         if (ACPI_FAILURE(status)) {
@@ -749,6 +800,12 @@ static int __init acpi_bus_init(void)
                 goto error1;
         }
 
+        /*
+         * Maybe EC region is required at bus_scan/acpi_get_devices. So it
+         * is necessary to enable it as early as possible.
+         */
+        acpi_boot_ec_enable();
+
         printk(KERN_INFO PREFIX "Interpreter enabled\n");
 
         /* Initialize sleep structures */
@@ -818,7 +875,11 @@ static int __init acpi_init(void)
                 }
         } else
                 disable_acpi();
-
+        /*
+         * If the laptop falls into the DMI check table, the power state check
+         * will be disabled in the course of device power transistion.
+         */
+        dmi_check_system(power_nocheck_dmi_table);
         return result;
 }
 
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 1dfec413588c..171fd914f435 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -33,7 +33,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_BUTTON_COMPONENT           0x00080000
 #define ACPI_BUTTON_CLASS               "button"
 #define ACPI_BUTTON_FILE_INFO           "info"
 #define ACPI_BUTTON_FILE_STATE          "state"
@@ -145,7 +144,7 @@ static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_button *button = seq->private;
         acpi_status status;
-        unsigned long state;
+        unsigned long long state;
 
         if (!button || !button->device)
                 return 0;
@@ -253,7 +252,7 @@ static int acpi_button_remove_fs(struct acpi_device *device)
    -------------------------------------------------------------------------- */
 static int acpi_lid_send_state(struct acpi_button *button)
 {
-        unsigned long state;
+        unsigned long long state;
         acpi_status status;
 
         status = acpi_evaluate_integer(button->device->handle, "_LID", NULL,
@@ -262,6 +261,7 @@ static int acpi_lid_send_state(struct acpi_button *button)
                 return -ENODEV;
         /* input layer checks if event is redundant */
         input_report_switch(button->input, SW_LID, !state);
+        input_sync(button->input);
         return 0;
 }
 
@@ -285,8 +285,8 @@ static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
                         input_report_key(input, keycode, 1);
                         input_sync(input);
                         input_report_key(input, keycode, 0);
+                        input_sync(input);
                 }
-                input_sync(input);
 
                 acpi_bus_generate_proc_event(button->device, event,
                                         ++button->pushed);
@@ -384,7 +384,7 @@ static int acpi_button_add(struct acpi_device *device)
                 return -ENOMEM;
 
         button->device = device;
-        acpi_driver_data(device) = button;
+        device->driver_data = button;
 
         button->input = input = input_allocate_device();
         if (!input) {
@@ -478,7 +478,7 @@ static int acpi_button_add(struct acpi_device *device)
                                   device->wakeup.gpe_number,
                                   ACPI_GPE_TYPE_WAKE_RUN);
                 acpi_enable_gpe(device->wakeup.gpe_device,
-                                device->wakeup.gpe_number, ACPI_NOT_ISR);
+                                device->wakeup.gpe_number);
                 device->wakeup.state.enabled = 1;
         }
 
diff --git a/drivers/acpi/cm_sbs.c b/drivers/acpi/cm_sbs.c
index f9db4f444bd0..307963bd1043 100644
--- a/drivers/acpi/cm_sbs.c
+++ b/drivers/acpi/cm_sbs.c
@@ -34,7 +34,6 @@
 ACPI_MODULE_NAME("cm_sbs");
 #define ACPI_AC_CLASS           "ac_adapter"
 #define ACPI_BATTERY_CLASS      "battery"
-#define ACPI_SBS_COMPONENT      0x00080000
 #define _COMPONENT              ACPI_SBS_COMPONENT
 static struct proc_dir_entry *acpi_ac_dir;
 static struct proc_dir_entry *acpi_battery_dir;
@@ -52,8 +51,8 @@ struct proc_dir_entry *acpi_lock_ac_dir(void)
         if (acpi_ac_dir) {
                 lock_ac_dir_cnt++;
         } else {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Cannot create %s\n", ACPI_AC_CLASS));
+                printk(KERN_ERR PREFIX
+                                  "Cannot create %s\n", ACPI_AC_CLASS);
         }
         mutex_unlock(&cm_sbs_mutex);
         return acpi_ac_dir;
@@ -83,8 +82,8 @@ struct proc_dir_entry *acpi_lock_battery_dir(void)
         if (acpi_battery_dir) {
                 lock_battery_dir_cnt++;
         } else {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Cannot create %s\n", ACPI_BATTERY_CLASS));
+                printk(KERN_ERR PREFIX
+                                  "Cannot create %s\n", ACPI_BATTERY_CLASS);
         }
         mutex_unlock(&cm_sbs_mutex);
         return acpi_battery_dir;
@@ -105,9 +104,3 @@ void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
         return;
 }
 EXPORT_SYMBOL(acpi_unlock_battery_dir);
-
-static int __init acpi_cm_sbs_init(void)
-{
-        return 0;
-}
-subsys_initcall(acpi_cm_sbs_init);
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 3c25ec7a1871..17020c12623c 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -41,7 +41,6 @@
 #define INSTALL_NOTIFY_HANDLER          1
 #define UNINSTALL_NOTIFY_HANDLER        2
 
-#define ACPI_CONTAINER_COMPONENT        0x01000000
 #define _COMPONENT                      ACPI_CONTAINER_COMPONENT
 ACPI_MODULE_NAME("container");
 
@@ -76,7 +75,7 @@ static int is_device_present(acpi_handle handle)
 {
         acpi_handle temp;
         acpi_status status;
-        unsigned long sta;
+        unsigned long long sta;
 
 
         status = acpi_get_handle(handle, "_STA", &temp);
@@ -108,7 +107,7 @@ static int acpi_container_add(struct acpi_device *device)
         container->handle = device->handle;
         strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS);
-        acpi_driver_data(device) = container;
+        device->driver_data = container;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n",
                           acpi_device_name(device), acpi_device_bid(device)));
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index 6df564f4ca6e..c48396892008 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -44,11 +44,24 @@ static const struct acpi_dlayer acpi_debug_layers[] = {
         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
         ACPI_DEBUG_INIT(ACPI_COMPILER),
         ACPI_DEBUG_INIT(ACPI_TOOLS),
+
+        ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
+        ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
 };
 
 static const struct acpi_dlevel acpi_debug_levels[] = {
-        ACPI_DEBUG_INIT(ACPI_LV_ERROR),
-        ACPI_DEBUG_INIT(ACPI_LV_WARN),
         ACPI_DEBUG_INIT(ACPI_LV_INIT),
         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
         ACPI_DEBUG_INIT(ACPI_LV_INFO),
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 4613b9ca5792..279a5a60a0dd 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -103,6 +103,9 @@ acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
                                                     NULL);
                 acpi_ex_enter_interpreter();
         }
+
+        acpi_ds_clear_implicit_return(walk_state);
+
 #ifdef ACPI_DISASSEMBLER
         if (ACPI_FAILURE(status)) {
 
diff --git a/drivers/acpi/dispatcher/dsmthdat.c b/drivers/acpi/dispatcher/dsmthdat.c
index 13c43eac35db..d03f81bd1bcb 100644
--- a/drivers/acpi/dispatcher/dsmthdat.c
+++ b/drivers/acpi/dispatcher/dsmthdat.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acdispat.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 #include <acpi/acinterp.h>
 
@@ -52,11 +51,11 @@ ACPI_MODULE_NAME("dsmthdat")
 
 /* Local prototypes */
 static void
-acpi_ds_method_data_delete_value(u16 opcode,
+acpi_ds_method_data_delete_value(u8 type,
                                  u32 index, struct acpi_walk_state *walk_state);
 
 static acpi_status
-acpi_ds_method_data_set_value(u16 opcode,
+acpi_ds_method_data_set_value(u8 type,
                               u32 index,
                               union acpi_operand_object *object,
                               struct acpi_walk_state *walk_state);
@@ -216,7 +215,7 @@ acpi_ds_method_data_init_args(union acpi_operand_object **params,
                  * Store the argument in the method/walk descriptor.
                  * Do not copy the arg in order to implement call by reference
                  */
-                status = acpi_ds_method_data_set_value(AML_ARG_OP, index,
+                status = acpi_ds_method_data_set_value(ACPI_REFCLASS_ARG, index,
                                                        params[index],
                                                        walk_state);
                 if (ACPI_FAILURE(status)) {
@@ -234,7 +233,8 @@ acpi_ds_method_data_init_args(union acpi_operand_object **params,
  *
  * FUNCTION:    acpi_ds_method_data_get_node
  *
- * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP
+ * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
  *              Index               - Which Local or Arg whose type to get
  *              walk_state          - Current walk state object
  *              Node                - Where the node is returned.
@@ -246,7 +246,7 @@ acpi_ds_method_data_init_args(union acpi_operand_object **params,
  ******************************************************************************/
 
 acpi_status
-acpi_ds_method_data_get_node(u16 opcode,
+acpi_ds_method_data_get_node(u8 type,
                              u32 index,
                              struct acpi_walk_state *walk_state,
                              struct acpi_namespace_node **node)
@@ -256,8 +256,8 @@ acpi_ds_method_data_get_node(u16 opcode,
         /*
          * Method Locals and Arguments are supported
          */
-        switch (opcode) {
-        case AML_LOCAL_OP:
+        switch (type) {
+        case ACPI_REFCLASS_LOCAL:
 
                 if (index > ACPI_METHOD_MAX_LOCAL) {
                         ACPI_ERROR((AE_INFO,
@@ -271,7 +271,7 @@ acpi_ds_method_data_get_node(u16 opcode,
                 *node = &walk_state->local_variables[index];
                 break;
 
-        case AML_ARG_OP:
+        case ACPI_REFCLASS_ARG:
 
                 if (index > ACPI_METHOD_MAX_ARG) {
                         ACPI_ERROR((AE_INFO,
@@ -286,8 +286,8 @@ acpi_ds_method_data_get_node(u16 opcode,
                 break;
 
         default:
-                ACPI_ERROR((AE_INFO, "Opcode %d is invalid", opcode));
-                return_ACPI_STATUS(AE_AML_BAD_OPCODE);
+                ACPI_ERROR((AE_INFO, "Type %d is invalid", type));
+                return_ACPI_STATUS(AE_TYPE);
         }
 
         return_ACPI_STATUS(AE_OK);
@@ -297,7 +297,8 @@ acpi_ds_method_data_get_node(u16 opcode,
  *
  * FUNCTION:    acpi_ds_method_data_set_value
  *
- * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP
+ * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
  *              Index               - Which Local or Arg to get
  *              Object              - Object to be inserted into the stack entry
  *              walk_state          - Current walk state object
@@ -310,7 +311,7 @@ acpi_ds_method_data_get_node(u16 opcode,
  ******************************************************************************/
 
 static acpi_status
-acpi_ds_method_data_set_value(u16 opcode,
+acpi_ds_method_data_set_value(u8 type,
                               u32 index,
                               union acpi_operand_object *object,
                               struct acpi_walk_state *walk_state)
@@ -321,13 +322,13 @@ acpi_ds_method_data_set_value(u16 opcode,
         ACPI_FUNCTION_TRACE(ds_method_data_set_value);
 
         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
-                          "NewObj %p Opcode %X, Refs=%d [%s]\n", object,
-                          opcode, object->common.reference_count,
+                          "NewObj %p Type %2.2X, Refs=%d [%s]\n", object,
+                          type, object->common.reference_count,
                           acpi_ut_get_type_name(object->common.type)));
 
         /* Get the namespace node for the arg/local */
 
-        status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
+        status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -350,7 +351,8 @@ acpi_ds_method_data_set_value(u16 opcode,
  *
  * FUNCTION:    acpi_ds_method_data_get_value
  *
- * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP
+ * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
  *              Index               - Which local_var or argument to get
  *              walk_state          - Current walk state object
  *              dest_desc           - Where Arg or Local value is returned
@@ -363,7 +365,7 @@ acpi_ds_method_data_set_value(u16 opcode,
  ******************************************************************************/
 
 acpi_status
-acpi_ds_method_data_get_value(u16 opcode,
+acpi_ds_method_data_get_value(u8 type,
                               u32 index,
                               struct acpi_walk_state *walk_state,
                               union acpi_operand_object **dest_desc)
@@ -383,7 +385,7 @@ acpi_ds_method_data_get_value(u16 opcode,
 
         /* Get the namespace node for the arg/local */
 
-        status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
+        status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -419,8 +421,8 @@ acpi_ds_method_data_get_value(u16 opcode,
                 /* Otherwise, return the error */
 
                 else
-                        switch (opcode) {
-                        case AML_ARG_OP:
+                        switch (type) {
+                        case ACPI_REFCLASS_ARG:
 
                                 ACPI_ERROR((AE_INFO,
                                             "Uninitialized Arg[%d] at node %p",
@@ -428,7 +430,7 @@ acpi_ds_method_data_get_value(u16 opcode,
 
                                 return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG);
 
-                        case AML_LOCAL_OP:
+                        case ACPI_REFCLASS_LOCAL:
 
                                 ACPI_ERROR((AE_INFO,
                                             "Uninitialized Local[%d] at node %p",
@@ -437,9 +439,10 @@ acpi_ds_method_data_get_value(u16 opcode,
                                 return_ACPI_STATUS(AE_AML_UNINITIALIZED_LOCAL);
 
                         default:
+
                                 ACPI_ERROR((AE_INFO,
                                             "Not a Arg/Local opcode: %X",
-                                            opcode));
+                                            type));
                                 return_ACPI_STATUS(AE_AML_INTERNAL);
                         }
         }
@@ -458,7 +461,8 @@ acpi_ds_method_data_get_value(u16 opcode,
  *
  * FUNCTION:    acpi_ds_method_data_delete_value
  *
- * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP
+ * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
  *              Index               - Which local_var or argument to delete
  *              walk_state          - Current walk state object
  *
@@ -470,7 +474,7 @@ acpi_ds_method_data_get_value(u16 opcode,
  ******************************************************************************/
 
 static void
-acpi_ds_method_data_delete_value(u16 opcode,
+acpi_ds_method_data_delete_value(u8 type,
                                  u32 index, struct acpi_walk_state *walk_state)
 {
         acpi_status status;
@@ -481,7 +485,7 @@ acpi_ds_method_data_delete_value(u16 opcode,
 
         /* Get the namespace node for the arg/local */
 
-        status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
+        status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
         if (ACPI_FAILURE(status)) {
                 return_VOID;
         }
@@ -514,7 +518,8 @@ acpi_ds_method_data_delete_value(u16 opcode,
  *
  * FUNCTION:    acpi_ds_store_object_to_local
  *
- * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP
+ * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
  *              Index               - Which Local or Arg to set
  *              obj_desc            - Value to be stored
  *              walk_state          - Current walk state
@@ -528,7 +533,7 @@ acpi_ds_method_data_delete_value(u16 opcode,
  ******************************************************************************/
 
 acpi_status
-acpi_ds_store_object_to_local(u16 opcode,
+acpi_ds_store_object_to_local(u8 type,
                               u32 index,
                               union acpi_operand_object *obj_desc,
                               struct acpi_walk_state *walk_state)
@@ -539,8 +544,8 @@ acpi_ds_store_object_to_local(u16 opcode,
         union acpi_operand_object *new_obj_desc;
 
         ACPI_FUNCTION_TRACE(ds_store_object_to_local);
-        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Opcode=%X Index=%d Obj=%p\n",
-                          opcode, index, obj_desc));
+        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Type=%2.2X Index=%d Obj=%p\n",
+                          type, index, obj_desc));
 
         /* Parameter validation */
 
@@ -550,7 +555,7 @@ acpi_ds_store_object_to_local(u16 opcode,
 
         /* Get the namespace node for the arg/local */
 
-        status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
+        status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -602,7 +607,7 @@ acpi_ds_store_object_to_local(u16 opcode,
                  *
                  * Weird, but true.
                  */
-                if (opcode == AML_ARG_OP) {
+                if (type == ACPI_REFCLASS_ARG) {
                         /*
                          * If we have a valid reference object that came from ref_of(),
                          * do the indirect store
@@ -611,8 +616,8 @@ acpi_ds_store_object_to_local(u16 opcode,
                              ACPI_DESC_TYPE_OPERAND)
                             && (current_obj_desc->common.type ==
                                 ACPI_TYPE_LOCAL_REFERENCE)
-                            && (current_obj_desc->reference.opcode ==
-                                AML_REF_OF_OP)) {
+                            && (current_obj_desc->reference.class ==
+                                ACPI_REFCLASS_REFOF)) {
                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                                                   "Arg (%p) is an ObjRef(Node), storing in node %p\n",
                                                   new_obj_desc,
@@ -640,11 +645,9 @@ acpi_ds_store_object_to_local(u16 opcode,
                         }
                 }
 
-                /*
-                 * Delete the existing object
-                 * before storing the new one
-                 */
-                acpi_ds_method_data_delete_value(opcode, index, walk_state);
+                /* Delete the existing object before storing the new one */
+
+                acpi_ds_method_data_delete_value(type, index, walk_state);
         }
 
         /*
@@ -653,7 +656,7 @@ acpi_ds_store_object_to_local(u16 opcode,
          * (increments the object reference count by one)
          */
         status =
-            acpi_ds_method_data_set_value(opcode, index, new_obj_desc,
+            acpi_ds_method_data_set_value(type, index, new_obj_desc,
                                           walk_state);
 
         /* Remove local reference if we copied the object above */
diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c
index 0f2805899210..4f08e599d07e 100644
--- a/drivers/acpi/dispatcher/dsobject.c
+++ b/drivers/acpi/dispatcher/dsobject.c
@@ -731,54 +731,70 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
                 switch (op_info->type) {
                 case AML_TYPE_LOCAL_VARIABLE:
 
-                        /* Split the opcode into a base opcode + offset */
+                        /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
 
-                        obj_desc->reference.opcode = AML_LOCAL_OP;
-                        obj_desc->reference.offset = opcode - AML_LOCAL_OP;
+                        obj_desc->reference.value = opcode - AML_LOCAL_OP;
+                        obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
-                        status = acpi_ds_method_data_get_node(AML_LOCAL_OP,
-                                                              obj_desc->
-                                                              reference.offset,
-                                                              walk_state,
-                                                              (struct
-                                                               acpi_namespace_node
-                                                               **)&obj_desc->
-                                                              reference.object);
+                        status =
+                            acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
+                                                         obj_desc->reference.
+                                                         value, walk_state,
+                                                         ACPI_CAST_INDIRECT_PTR
+                                                         (struct
+                                                          acpi_namespace_node,
+                                                          &obj_desc->reference.
+                                                          object));
 #endif
                         break;
 
                 case AML_TYPE_METHOD_ARGUMENT:
 
-                        /* Split the opcode into a base opcode + offset */
+                        /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
 
-                        obj_desc->reference.opcode = AML_ARG_OP;
-                        obj_desc->reference.offset = opcode - AML_ARG_OP;
+                        obj_desc->reference.value = opcode - AML_ARG_OP;
+                        obj_desc->reference.class = ACPI_REFCLASS_ARG;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
-                        status = acpi_ds_method_data_get_node(AML_ARG_OP,
+                        status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
                                                               obj_desc->
-                                                              reference.offset,
+                                                              reference.value,
                                                               walk_state,
+                                                              ACPI_CAST_INDIRECT_PTR
                                                               (struct
-                                                               acpi_namespace_node
-                                                               **)&obj_desc->
-                                                              reference.object);
+                                                               acpi_namespace_node,
+                                                               &obj_desc->
+                                                               reference.
+                                                               object));
 #endif
                         break;
 
-                default:        /* Other literals, etc.. */
+                default:        /* Object name or Debug object */
 
-                        if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
+                        switch (op->common.aml_opcode) {
+                        case AML_INT_NAMEPATH_OP:
 
                                 /* Node was saved in Op */
 
                                 obj_desc->reference.node = op->common.node;
                                 obj_desc->reference.object =
                                     op->common.node->object;
-                        }
+                                obj_desc->reference.class = ACPI_REFCLASS_NAME;
+                                break;
+
+                        case AML_DEBUG_OP:
 
-                        obj_desc->reference.opcode = opcode;
+                                obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
+                                break;
+
+                        default:
+
+                                ACPI_ERROR((AE_INFO,
+                                            "Unimplemented reference type for AML opcode: %4.4X",
+                                            opcode));
+                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+                        }
                         break;
                 }
                 break;
diff --git a/drivers/acpi/dispatcher/dsopcode.c b/drivers/acpi/dispatcher/dsopcode.c
index 6a81c4400edf..69fae5905bb8 100644
--- a/drivers/acpi/dispatcher/dsopcode.c
+++ b/drivers/acpi/dispatcher/dsopcode.c
@@ -1330,7 +1330,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
                              (walk_state->results->results.obj_desc[0]) ==
                              ACPI_TYPE_LOCAL_REFERENCE)
                             && ((walk_state->results->results.obj_desc[0])->
-                                reference.opcode != AML_INDEX_OP)) {
+                                reference.class != ACPI_REFCLASS_INDEX)) {
                                 status =
                                     acpi_ex_resolve_to_value(&walk_state->
                                                              results->results.
diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c
index b5072fa9c920..396fe12078cd 100644
--- a/drivers/acpi/dispatcher/dswexec.c
+++ b/drivers/acpi/dispatcher/dswexec.c
@@ -166,6 +166,10 @@ acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
                 status = AE_CTRL_FALSE;
         }
 
+        /* Predicate can be used for an implicit return value */
+
+        (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
+
       cleanup:
 
         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
@@ -429,10 +433,10 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
                              ACPI_TYPE_LOCAL_REFERENCE)
                             && (walk_state->operands[1]->common.type ==
                                 ACPI_TYPE_LOCAL_REFERENCE)
-                            && (walk_state->operands[0]->reference.opcode ==
-                                walk_state->operands[1]->reference.opcode)
-                            && (walk_state->operands[0]->reference.offset ==
-                                walk_state->operands[1]->reference.offset)) {
+                            && (walk_state->operands[0]->reference.class ==
+                                walk_state->operands[1]->reference.class)
+                            && (walk_state->operands[0]->reference.value ==
+                                walk_state->operands[1]->reference.value)) {
                                 status = AE_OK;
                         } else {
                                 ACPI_EXCEPTION((AE_INFO, status,
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 7d2edf143f16..5b30b8d91d71 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -48,7 +48,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
         " before undocking");
 
 static struct atomic_notifier_head dock_notifier_list;
-static struct platform_device *dock_device;
 static char dock_device_name[] = "dock";
 
 static const struct acpi_device_id dock_device_ids[] = {
@@ -65,23 +64,29 @@ struct dock_station {
         struct mutex hp_lock;
         struct list_head dependent_devices;
         struct list_head hotplug_devices;
+
+        struct list_head sibiling;
+        struct platform_device *dock_device;
 };
+static LIST_HEAD(dock_stations);
+static int dock_station_count;
 
 struct dock_dependent_device {
         struct list_head list;
         struct list_head hotplug_list;
         acpi_handle handle;
-        acpi_notify_handler handler;
+        struct acpi_dock_ops *ops;
         void *context;
 };
 
 #define DOCK_DOCKING    0x00000001
 #define DOCK_UNDOCKING  0x00000002
+#define DOCK_IS_DOCK    0x00000010
+#define DOCK_IS_ATA     0x00000020
+#define DOCK_IS_BAT     0x00000040
 #define DOCK_EVENT      3
 #define UNDOCK_EVENT    2
 
-static struct dock_station *dock_station;
-
 /*****************************************************************************
  *                         Dock Dependent device functions                   *
  *****************************************************************************/
@@ -199,6 +204,60 @@ static int is_dock(acpi_handle handle)
         return 1;
 }
 
+static int is_ejectable(acpi_handle handle)
+{
+        acpi_status status;
+        acpi_handle tmp;
+
+        status = acpi_get_handle(handle, "_EJ0", &tmp);
+        if (ACPI_FAILURE(status))
+                return 0;
+        return 1;
+}
+
+static int is_ata(acpi_handle handle)
+{
+        acpi_handle tmp;
+
+        if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
+           (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
+           (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
+           (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
+                return 1;
+
+        return 0;
+}
+
+static int is_battery(acpi_handle handle)
+{
+        struct acpi_device_info *info;
+        struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+        int ret = 1;
+
+        if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer)))
+                return 0;
+        info = buffer.pointer;
+        if (!(info->valid & ACPI_VALID_HID))
+                ret = 0;
+        else
+                ret = !strcmp("PNP0C0A", info->hardware_id.value);
+
+        kfree(buffer.pointer);
+        return ret;
+}
+
+static int is_ejectable_bay(acpi_handle handle)
+{
+        acpi_handle phandle;
+        if (!is_ejectable(handle))
+                return 0;
+        if (is_battery(handle) || is_ata(handle))
+                return 1;
+        if (!acpi_get_parent(handle, &phandle) && is_ata(phandle))
+                return 1;
+        return 0;
+}
+
 /**
  * is_dock_device - see if a device is on a dock station
  * @handle: acpi handle of the device
@@ -209,11 +268,17 @@ static int is_dock(acpi_handle handle)
  */
 int is_dock_device(acpi_handle handle)
 {
-        if (!dock_station)
+        struct dock_station *dock_station;
+
+        if (!dock_station_count)
                 return 0;
 
-        if (is_dock(handle) || find_dock_dependent_device(dock_station, handle))
+        if (is_dock(handle))
                 return 1;
+        list_for_each_entry(dock_station, &dock_stations, sibiling) {
+                if (find_dock_dependent_device(dock_station, handle))
+                        return 1;
+        }
 
         return 0;
 }
@@ -229,7 +294,7 @@ EXPORT_SYMBOL_GPL(is_dock_device);
  */
 static int dock_present(struct dock_station *ds)
 {
-        unsigned long sta;
+        unsigned long long sta;
         acpi_status status;
 
         if (ds) {
@@ -320,8 +385,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
          * First call driver specific hotplug functions
          */
         list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) {
-                if (dd->handler)
-                        dd->handler(dd->handle, event, dd->context);
+                if (dd->ops && dd->ops->handler)
+                        dd->ops->handler(dd->handle, event, dd->context);
         }
 
         /*
@@ -341,9 +406,10 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
 
 static void dock_event(struct dock_station *ds, u32 event, int num)
 {
-        struct device *dev = &dock_device->dev;
+        struct device *dev = &ds->dock_device->dev;
         char event_string[13];
         char *envp[] = { event_string, NULL };
+        struct dock_dependent_device *dd;
 
         if (num == UNDOCK_EVENT)
                 sprintf(event_string, "EVENT=undock");
@@ -354,7 +420,14 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
          * Indicate that the status of the dock station has
          * changed.
          */
-        kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+        if (num == DOCK_EVENT)
+                kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+
+        list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
+                if (dd->ops && dd->ops->uevent)
+                        dd->ops->uevent(dd->handle, event, dd->context);
+        if (num != DOCK_EVENT)
+                kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
 }
 
 /**
@@ -414,9 +487,10 @@ static void handle_dock(struct dock_station *ds, int dock)
         arg.type = ACPI_TYPE_INTEGER;
         arg.integer.value = dock;
         status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer);
-        if (ACPI_FAILURE(status))
-                printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n",
-                         (char *)name_buffer.pointer);
+        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
+                ACPI_EXCEPTION((AE_INFO, status, "%s - failed to execute"
+                        " _DCK\n", (char *)name_buffer.pointer));
+
         kfree(buffer.pointer);
         kfree(name_buffer.pointer);
 }
@@ -452,6 +526,25 @@ static inline void complete_undock(struct dock_station *ds)
         ds->flags &= ~(DOCK_UNDOCKING);
 }
 
+static void dock_lock(struct dock_station *ds, int lock)
+{
+        struct acpi_object_list arg_list;
+        union acpi_object arg;
+        acpi_status status;
+
+        arg_list.count = 1;
+        arg_list.pointer = &arg;
+        arg.type = ACPI_TYPE_INTEGER;
+        arg.integer.value = !!lock;
+        status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
+        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+                if (lock)
+                        printk(KERN_WARNING PREFIX "Locking device failed\n");
+                else
+                        printk(KERN_WARNING PREFIX "Unlocking device failed\n");
+        }
+}
+
 /**
  * dock_in_progress - see if we are in the middle of handling a dock event
  * @ds: the dock station
@@ -479,7 +572,7 @@ static int dock_in_progress(struct dock_station *ds)
  */
 int register_dock_notifier(struct notifier_block *nb)
 {
-        if (!dock_station)
+        if (!dock_station_count)
                 return -ENODEV;
 
         return atomic_notifier_chain_register(&dock_notifier_list, nb);
@@ -493,7 +586,7 @@ EXPORT_SYMBOL_GPL(register_dock_notifier);
  */
 void unregister_dock_notifier(struct notifier_block *nb)
 {
-        if (!dock_station)
+        if (!dock_station_count)
                 return;
 
         atomic_notifier_chain_unregister(&dock_notifier_list, nb);
@@ -504,7 +597,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
 /**
  * register_hotplug_dock_device - register a hotplug function
  * @handle: the handle of the device
- * @handler: the acpi_notifier_handler to call after docking
+ * @ops: handlers to call after docking
  * @context: device specific data
  *
  * If a driver would like to perform a hotplug operation after a dock
@@ -512,27 +605,36 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
  * the dock driver after _DCK is executed.
  */
 int
-register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler,
+register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
                              void *context)
 {
         struct dock_dependent_device *dd;
+        struct dock_station *dock_station;
+        int ret = -EINVAL;
 
-        if (!dock_station)
+        if (!dock_station_count)
                 return -ENODEV;
 
         /*
          * make sure this handle is for a device dependent on the dock,
          * this would include the dock station itself
          */
-        dd = find_dock_dependent_device(dock_station, handle);
-        if (dd) {
-                dd->handler = handler;
-                dd->context = context;
-                dock_add_hotplug_device(dock_station, dd);
-                return 0;
+        list_for_each_entry(dock_station, &dock_stations, sibiling) {
+                /*
+                 * An ATA bay can be in a dock and itself can be ejected
+                 * seperately, so there are two 'dock stations' which need the
+                 * ops
+                 */
+                dd = find_dock_dependent_device(dock_station, handle);
+                if (dd) {
+                        dd->ops = ops;
+                        dd->context = context;
+                        dock_add_hotplug_device(dock_station, dd);
+                        ret = 0;
+                }
         }
 
-        return -EINVAL;
+        return ret;
 }
 
 EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
@@ -544,13 +646,16 @@ EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
 void unregister_hotplug_dock_device(acpi_handle handle)
 {
         struct dock_dependent_device *dd;
+        struct dock_station *dock_station;
 
-        if (!dock_station)
+        if (!dock_station_count)
                 return;
 
-        dd = find_dock_dependent_device(dock_station, handle);
-        if (dd)
-                dock_del_hotplug_device(dock_station, dd);
+        list_for_each_entry(dock_station, &dock_stations, sibiling) {
+                dd = find_dock_dependent_device(dock_station, handle);
+                if (dd)
+                        dock_del_hotplug_device(dock_station, dd);
+        }
 }
 
 EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
@@ -575,13 +680,9 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
          */
         dock_event(ds, event, UNDOCK_EVENT);
 
-        if (!dock_present(ds)) {
-                complete_undock(ds);
-                return -ENODEV;
-        }
-
         hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
         undock(ds);
+        dock_lock(ds, 0);
         eject_dock(ds);
         if (dock_present(ds)) {
                 printk(KERN_ERR PREFIX "Unable to undock!\n");
@@ -604,14 +705,36 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
 static void dock_notify(acpi_handle handle, u32 event, void *data)
 {
         struct dock_station *ds = data;
+        struct acpi_device *tmp;
+        int surprise_removal = 0;
+
+        /*
+         * According to acpi spec 3.0a, if a DEVICE_CHECK notification
+         * is sent and _DCK is present, it is assumed to mean an undock
+         * request.
+         */
+        if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK)
+                event = ACPI_NOTIFY_EJECT_REQUEST;
 
+        /*
+         * dock station: BUS_CHECK - docked or surprise removal
+         *               DEVICE_CHECK - undocked
+         * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal
+         *
+         * To simplify event handling, dock dependent device handler always
+         * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
+         * ACPI_NOTIFY_EJECT_REQUEST for removal
+         */
         switch (event) {
         case ACPI_NOTIFY_BUS_CHECK:
-                if (!dock_in_progress(ds) && dock_present(ds)) {
+        case ACPI_NOTIFY_DEVICE_CHECK:
+                if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle,
+                   &tmp)) {
                         begin_dock(ds);
                         dock(ds);
                         if (!dock_present(ds)) {
                                 printk(KERN_ERR PREFIX "Unable to dock!\n");
+                                complete_dock(ds);
                                 break;
                         }
                         atomic_notifier_call_chain(&dock_notifier_list,
@@ -619,20 +742,19 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
                         hotplug_dock_devices(ds, event);
                         complete_dock(ds);
                         dock_event(ds, event, DOCK_EVENT);
+                        dock_lock(ds, 1);
+                        break;
                 }
-                break;
-        case ACPI_NOTIFY_DEVICE_CHECK:
-        /*
-         * According to acpi spec 3.0a, if a DEVICE_CHECK notification
-         * is sent and _DCK is present, it is assumed to mean an
-         * undock request.  This notify routine will only be called
-         * for objects defining _DCK, so we will fall through to eject
-         * request here.  However, we will pass an eject request through
-         * to the driver who wish to hotplug.
-         */
+                if (dock_present(ds) || dock_in_progress(ds))
+                        break;
+                /* This is a surprise removal */
+                surprise_removal = 1;
+                event = ACPI_NOTIFY_EJECT_REQUEST;
+                /* Fall back */
         case ACPI_NOTIFY_EJECT_REQUEST:
                 begin_undock(ds);
-                if (immediate_undock)
+                if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
+                   || surprise_removal)
                         handle_eject_request(ds, event);
                 else
                         dock_event(ds, event, UNDOCK_EVENT);
@@ -642,6 +764,51 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
         }
 }
 
+struct dock_data {
+        acpi_handle handle;
+        unsigned long event;
+        struct dock_station *ds;
+};
+
+static void acpi_dock_deferred_cb(void *context)
+{
+        struct dock_data *data = (struct dock_data *)context;
+
+        dock_notify(data->handle, data->event, data->ds);
+        kfree(data);
+}
+
+static int acpi_dock_notifier_call(struct notifier_block *this,
+        unsigned long event, void *data)
+{
+        struct dock_station *dock_station;
+        acpi_handle handle = (acpi_handle)data;
+
+        if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK
+           && event != ACPI_NOTIFY_EJECT_REQUEST)
+                return 0;
+        list_for_each_entry(dock_station, &dock_stations, sibiling) {
+                if (dock_station->handle == handle) {
+                        struct dock_data *dock_data;
+
+                        dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL);
+                        if (!dock_data)
+                                return 0;
+                        dock_data->handle = handle;
+                        dock_data->event = event;
+                        dock_data->ds = dock_station;
+                        acpi_os_hotplug_execute(acpi_dock_deferred_cb,
+                                dock_data);
+                        return 0 ;
+                }
+        }
+        return 0;
+}
+
+static struct notifier_block dock_acpi_notifier = {
+        .notifier_call = acpi_dock_notifier_call,
+};
+
 /**
  * find_dock_devices - find devices on the dock station
  * @handle: the handle of the device we are examining
@@ -688,6 +855,8 @@ fdd_out:
 static ssize_t show_docked(struct device *dev,
                            struct device_attribute *attr, char *buf)
 {
+        struct dock_station *dock_station = *((struct dock_station **)
+                dev->platform_data);
         return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station));
 
 }
@@ -699,6 +868,8 @@ static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL);
 static ssize_t show_flags(struct device *dev,
                           struct device_attribute *attr, char *buf)
 {
+        struct dock_station *dock_station = *((struct dock_station **)
+                dev->platform_data);
         return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags);
 
 }
@@ -711,6 +882,8 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
                            const char *buf, size_t count)
 {
         int ret;
+        struct dock_station *dock_station = *((struct dock_station **)
+                dev->platform_data);
 
         if (!count)
                 return -EINVAL;
@@ -727,16 +900,38 @@ static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock);
 static ssize_t show_dock_uid(struct device *dev,
                              struct device_attribute *attr, char *buf)
 {
-        unsigned long lbuf;
+        unsigned long long lbuf;
+        struct dock_station *dock_station = *((struct dock_station **)
+                dev->platform_data);
         acpi_status status = acpi_evaluate_integer(dock_station->handle,
                                         "_UID", NULL, &lbuf);
         if (ACPI_FAILURE(status))
             return 0;
 
-        return snprintf(buf, PAGE_SIZE, "%lx\n", lbuf);
+        return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf);
 }
 static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
 
+static ssize_t show_dock_type(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        struct dock_station *dock_station = *((struct dock_station **)
+                dev->platform_data);
+        char *type;
+
+        if (dock_station->flags & DOCK_IS_DOCK)
+                type = "dock_station";
+        else if (dock_station->flags & DOCK_IS_ATA)
+                type = "ata_bay";
+        else if (dock_station->flags & DOCK_IS_BAT)
+                type = "battery_bay";
+        else
+                type = "unknown";
+
+        return snprintf(buf, PAGE_SIZE, "%s\n", type);
+}
+static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
+
 /**
  * dock_add - add a new dock station
  * @handle: the dock station handle
@@ -747,8 +942,9 @@ static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
 static int dock_add(acpi_handle handle)
 {
         int ret;
-        acpi_status status;
         struct dock_dependent_device *dd;
+        struct dock_station *dock_station;
+        struct platform_device *dock_device;
 
         /* allocate & initialize the dock_station private data */
         dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL);
@@ -758,22 +954,34 @@ static int dock_add(acpi_handle handle)
         dock_station->last_dock_time = jiffies - HZ;
         INIT_LIST_HEAD(&dock_station->dependent_devices);
         INIT_LIST_HEAD(&dock_station->hotplug_devices);
+        INIT_LIST_HEAD(&dock_station->sibiling);
         spin_lock_init(&dock_station->dd_lock);
         mutex_init(&dock_station->hp_lock);
         ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
 
         /* initialize platform device stuff */
-        dock_device =
-                platform_device_register_simple(dock_device_name, 0, NULL, 0);
+        dock_station->dock_device =
+                platform_device_register_simple(dock_device_name,
+                        dock_station_count, NULL, 0);
+        dock_device = dock_station->dock_device;
         if (IS_ERR(dock_device)) {
                 kfree(dock_station);
                 dock_station = NULL;
                 return PTR_ERR(dock_device);
         }
+        platform_device_add_data(dock_device, &dock_station,
+                sizeof(struct dock_station *));
 
         /* we want the dock device to send uevents */
         dock_device->dev.uevent_suppress = 0;
 
+        if (is_dock(handle))
+                dock_station->flags |= DOCK_IS_DOCK;
+        if (is_ata(handle))
+                dock_station->flags |= DOCK_IS_ATA;
+        if (is_battery(handle))
+                dock_station->flags |= DOCK_IS_BAT;
+
         ret = device_create_file(&dock_device->dev, &dev_attr_docked);
         if (ret) {
                 printk("Error %d adding sysfs file\n", ret);
@@ -812,6 +1020,9 @@ static int dock_add(acpi_handle handle)
                 dock_station = NULL;
                 return ret;
         }
+        ret = device_create_file(&dock_device->dev, &dev_attr_type);
+        if (ret)
+                printk(KERN_ERR"Error %d adding sysfs file\n", ret);
 
         /* Find dependent devices */
         acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
@@ -828,24 +1039,12 @@ static int dock_add(acpi_handle handle)
         }
         add_dock_dependent_device(dock_station, dd);
 
-        /* register for dock events */
-        status = acpi_install_notify_handler(dock_station->handle,
-                                             ACPI_SYSTEM_NOTIFY,
-                                             dock_notify, dock_station);
-
-        if (ACPI_FAILURE(status)) {
-                printk(KERN_ERR PREFIX "Error installing notify handler\n");
-                ret = -ENODEV;
-                goto dock_add_err;
-        }
-
-        printk(KERN_INFO PREFIX "%s\n", ACPI_DOCK_DRIVER_DESCRIPTION);
-
+        dock_station_count++;
+        list_add(&dock_station->sibiling, &dock_stations);
         return 0;
 
-dock_add_err:
-        kfree(dd);
 dock_add_err_unregister:
+        device_remove_file(&dock_device->dev, &dev_attr_type);
         device_remove_file(&dock_device->dev, &dev_attr_docked);
         device_remove_file(&dock_device->dev, &dev_attr_undock);
         device_remove_file(&dock_device->dev, &dev_attr_uid);
@@ -859,12 +1058,12 @@ dock_add_err_unregister:
 /**
  * dock_remove - free up resources related to the dock station
  */
-static int dock_remove(void)
+static int dock_remove(struct dock_station *dock_station)
 {
         struct dock_dependent_device *dd, *tmp;
-        acpi_status status;
+        struct platform_device *dock_device = dock_station->dock_device;
 
-        if (!dock_station)
+        if (!dock_station_count)
                 return 0;
 
         /* remove dependent devices */
@@ -872,14 +1071,8 @@ static int dock_remove(void)
                                  list)
             kfree(dd);
 
-        /* remove dock notify handler */
-        status = acpi_remove_notify_handler(dock_station->handle,
-                                            ACPI_SYSTEM_NOTIFY,
-                                            dock_notify);
-        if (ACPI_FAILURE(status))
-                printk(KERN_ERR "Error removing notify handler\n");
-
         /* cleanup sysfs */
+        device_remove_file(&dock_device->dev, &dev_attr_type);
         device_remove_file(&dock_device->dev, &dev_attr_docked);
         device_remove_file(&dock_device->dev, &dev_attr_undock);
         device_remove_file(&dock_device->dev, &dev_attr_uid);
@@ -904,41 +1097,60 @@ static int dock_remove(void)
 static acpi_status
 find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-        int *count = context;
         acpi_status status = AE_OK;
 
         if (is_dock(handle)) {
                 if (dock_add(handle) >= 0) {
-                        (*count)++;
                         status = AE_CTRL_TERMINATE;
                 }
         }
         return status;
 }
 
-static int __init dock_init(void)
+static acpi_status
+find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-        int num = 0;
-
-        dock_station = NULL;
+        /* If bay is a dock, it's already handled */
+        if (is_ejectable_bay(handle) && !is_dock(handle))
+                dock_add(handle);
+        return AE_OK;
+}
 
+static int __init dock_init(void)
+{
         if (acpi_disabled)
                 return 0;
 
         /* look for a dock station */
         acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
-                            ACPI_UINT32_MAX, find_dock, &num, NULL);
+                            ACPI_UINT32_MAX, find_dock, NULL, NULL);
 
-        if (!num)
-                printk(KERN_INFO "No dock devices found.\n");
+        /* look for bay */
+        acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+                        ACPI_UINT32_MAX, find_bay, NULL, NULL);
+        if (!dock_station_count) {
+                printk(KERN_INFO PREFIX "No dock devices found.\n");
+                return 0;
+        }
 
+        register_acpi_bus_notifier(&dock_acpi_notifier);
+        printk(KERN_INFO PREFIX "%s: %d docks/bays found\n",
+                ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);
         return 0;
 }
 
 static void __exit dock_exit(void)
 {
-        dock_remove();
+        struct dock_station *dock_station;
+
+        unregister_acpi_bus_notifier(&dock_acpi_notifier);
+        list_for_each_entry(dock_station, &dock_stations, sibiling)
+                dock_remove(dock_station);
 }
 
-postcore_initcall(dock_init);
+/*
+ * Must be called before drivers of devices in dock, otherwise we can't know
+ * which devices are in a dock
+ */
+subsys_initcall(dock_init);
 module_exit(dock_exit);
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 13593f9f2197..30f3ef236ecb 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1,7 +1,7 @@
 /*
- *  ec.c - ACPI Embedded Controller Driver (v2.0)
+ *  ec.c - ACPI Embedded Controller Driver (v2.1)
  *
- *  Copyright (C) 2006, 2007 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
+ *  Copyright (C) 2006-2008 Alexey Starikovskiy <astarikovskiy@suse.de>
  *  Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com>
  *  Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
@@ -26,7 +26,7 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
-/* Uncomment next line to get verbose print outs*/
+/* Uncomment next line to get verbose printout */
 /* #define DEBUG */
 
 #include <linux/kernel.h>
@@ -38,6 +38,7 @@
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
 #include <linux/list.h>
+#include <linux/spinlock.h>
 #include <asm/io.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
@@ -65,22 +66,21 @@ enum ec_command {
         ACPI_EC_COMMAND_QUERY = 0x84,
 };
 
-/* EC events */
-enum ec_event {
-        ACPI_EC_EVENT_OBF_1 = 1,        /* Output buffer full */
-        ACPI_EC_EVENT_IBF_0,            /* Input buffer empty */
-};
-
 #define ACPI_EC_DELAY           500     /* Wait 500ms max. during EC ops */
 #define ACPI_EC_UDELAY_GLK      1000    /* Wait 1ms max. to get global lock */
 #define ACPI_EC_UDELAY          100     /* Wait 100us before polling EC again */
 
+#define ACPI_EC_STORM_THRESHOLD 8       /* number of false interrupts
+                                           per one transaction */
+
 enum {
-        EC_FLAGS_WAIT_GPE = 0,          /* Don't check status until GPE arrives */
         EC_FLAGS_QUERY_PENDING,         /* Query is pending */
-        EC_FLAGS_GPE_MODE,              /* Expect GPE to be sent for status change */
+        EC_FLAGS_GPE_MODE,              /* Expect GPE to be sent
+                                         * for status change */
         EC_FLAGS_NO_GPE,                /* Don't use GPE mode */
-        EC_FLAGS_RESCHEDULE_POLL        /* Re-schedule poll */
+        EC_FLAGS_GPE_STORM,             /* GPE storm detected */
+        EC_FLAGS_HANDLERS_INSTALLED     /* Handlers for GPE and
+                                         * OpReg are installed */
 };
 
 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
@@ -95,6 +95,18 @@ struct acpi_ec_query_handler {
         u8 query_bit;
 };
 
+struct transaction {
+        const u8 *wdata;
+        u8 *rdata;
+        unsigned short irq_count;
+        u8 command;
+        u8 wi;
+        u8 ri;
+        u8 wlen;
+        u8 rlen;
+        bool done;
+};
+
 static struct acpi_ec {
         acpi_handle handle;
         unsigned long gpe;
@@ -105,9 +117,8 @@ static struct acpi_ec {
         struct mutex lock;
         wait_queue_head_t wait;
         struct list_head list;
-        struct delayed_work work;
-        atomic_t irq_count;
-        u8 handlers_installed;
+        struct transaction *curr;
+        spinlock_t curr_lock;
 } *boot_ec, *first_ec;
 
 /* 
@@ -150,7 +161,7 @@ static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
 {
         u8 x = inb(ec->data_addr);
         pr_debug(PREFIX "---> data = 0x%2.2x\n", x);
-        return inb(ec->data_addr);
+        return x;
 }
 
 static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
@@ -165,158 +176,193 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
         outb(data, ec->data_addr);
 }
 
-static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
+static int ec_transaction_done(struct acpi_ec *ec)
 {
-        if (test_bit(EC_FLAGS_WAIT_GPE, &ec->flags))
-                return 0;
-        if (event == ACPI_EC_EVENT_OBF_1) {
-                if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF)
-                        return 1;
-        } else if (event == ACPI_EC_EVENT_IBF_0) {
-                if (!(acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF))
-                        return 1;
-        }
+        unsigned long flags;
+        int ret = 0;
+        spin_lock_irqsave(&ec->curr_lock, flags);
+        if (!ec->curr || ec->curr->done)
+                ret = 1;
+        spin_unlock_irqrestore(&ec->curr_lock, flags);
+        return ret;
+}
 
-        return 0;
+static void start_transaction(struct acpi_ec *ec)
+{
+        ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
+        ec->curr->done = false;
+        acpi_ec_write_cmd(ec, ec->curr->command);
 }
 
-static void ec_schedule_ec_poll(struct acpi_ec *ec)
+static void gpe_transaction(struct acpi_ec *ec, u8 status)
 {
-        if (test_bit(EC_FLAGS_RESCHEDULE_POLL, &ec->flags))
-                schedule_delayed_work(&ec->work,
-                                      msecs_to_jiffies(ACPI_EC_DELAY));
+        unsigned long flags;
+        spin_lock_irqsave(&ec->curr_lock, flags);
+        if (!ec->curr)
+                goto unlock;
+        if (ec->curr->wlen > ec->curr->wi) {
+                if ((status & ACPI_EC_FLAG_IBF) == 0)
+                        acpi_ec_write_data(ec,
+                                ec->curr->wdata[ec->curr->wi++]);
+                else
+                        goto err;
+        } else if (ec->curr->rlen > ec->curr->ri) {
+                if ((status & ACPI_EC_FLAG_OBF) == 1) {
+                        ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec);
+                        if (ec->curr->rlen == ec->curr->ri)
+                                ec->curr->done = true;
+                } else
+                        goto err;
+        } else if (ec->curr->wlen == ec->curr->wi &&
+                   (status & ACPI_EC_FLAG_IBF) == 0)
+                ec->curr->done = true;
+        goto unlock;
+err:
+        /* false interrupt, state didn't change */
+        if (in_interrupt())
+                ++ec->curr->irq_count;
+unlock:
+        spin_unlock_irqrestore(&ec->curr_lock, flags);
 }
 
-static void ec_switch_to_poll_mode(struct acpi_ec *ec)
+static int acpi_ec_wait(struct acpi_ec *ec)
 {
+        if (wait_event_timeout(ec->wait, ec_transaction_done(ec),
+                               msecs_to_jiffies(ACPI_EC_DELAY)))
+                return 0;
+        /* try restart command if we get any false interrupts */
+        if (ec->curr->irq_count &&
+            (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) {
+                pr_debug(PREFIX "controller reset, restart transaction\n");
+                start_transaction(ec);
+                if (wait_event_timeout(ec->wait, ec_transaction_done(ec),
+                                        msecs_to_jiffies(ACPI_EC_DELAY)))
+                        return 0;
+        }
+        /* missing GPEs, switch back to poll mode */
+        if (printk_ratelimit())
+                pr_info(PREFIX "missing confirmations, "
+                                "switch off interrupt mode.\n");
         set_bit(EC_FLAGS_NO_GPE, &ec->flags);
         clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
-        acpi_disable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
-        set_bit(EC_FLAGS_RESCHEDULE_POLL, &ec->flags);
+        return 1;
 }
 
-static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
+static void acpi_ec_gpe_query(void *ec_cxt);
+
+static int ec_check_sci(struct acpi_ec *ec, u8 state)
 {
-        atomic_set(&ec->irq_count, 0);
-        if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) &&
-            likely(!force_poll)) {
-                if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event),
-                                       msecs_to_jiffies(ACPI_EC_DELAY)))
-                        return 0;
-                clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
-                if (acpi_ec_check_status(ec, event)) {
-                        /* missing GPEs, switch back to poll mode */
-                        if (printk_ratelimit())
-                                pr_info(PREFIX "missing confirmations, "
-                                                "switch off interrupt mode.\n");
-                        ec_switch_to_poll_mode(ec);
-                        ec_schedule_ec_poll(ec);
-                        return 0;
-                }
-        } else {
-                unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
-                clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
-                while (time_before(jiffies, delay)) {
-                        if (acpi_ec_check_status(ec, event))
-                                return 0;
-                        msleep(1);
-                }
-                if (acpi_ec_check_status(ec,event))
+        if (state & ACPI_EC_FLAG_SCI) {
+                if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
+                        return acpi_os_execute(OSL_EC_BURST_HANDLER,
+                                acpi_ec_gpe_query, ec);
+        }
+        return 0;
+}
+
+static int ec_poll(struct acpi_ec *ec)
+{
+        unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
+        udelay(ACPI_EC_UDELAY);
+        while (time_before(jiffies, delay)) {
+                gpe_transaction(ec, acpi_ec_read_status(ec));
+                udelay(ACPI_EC_UDELAY);
+                if (ec_transaction_done(ec))
                         return 0;
         }
-        pr_err(PREFIX "acpi_ec_wait timeout, status = 0x%2.2x, event = %s\n",
-                acpi_ec_read_status(ec),
-                (event == ACPI_EC_EVENT_OBF_1) ? "\"b0=1\"" : "\"b1=0\"");
         return -ETIME;
 }
 
-static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
-                                        const u8 * wdata, unsigned wdata_len,
-                                        u8 * rdata, unsigned rdata_len,
+static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
+                                        struct transaction *t,
                                         int force_poll)
 {
-        int result = 0;
-        set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
+        unsigned long tmp;
+        int ret = 0;
         pr_debug(PREFIX "transaction start\n");
-        acpi_ec_write_cmd(ec, command);
-        for (; wdata_len > 0; --wdata_len) {
-                result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
-                if (result) {
-                        pr_err(PREFIX
-                               "write_cmd timeout, command = %d\n", command);
-                        goto end;
-                }
-                set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
-                acpi_ec_write_data(ec, *(wdata++));
+        /* disable GPE during transaction if storm is detected */
+        if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+                clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
+                acpi_disable_gpe(NULL, ec->gpe);
         }
-
-        if (!rdata_len) {
-                result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
-                if (result) {
-                        pr_err(PREFIX
-                               "finish-write timeout, command = %d\n", command);
-                        goto end;
-                }
-        } else if (command == ACPI_EC_COMMAND_QUERY)
+        /* start transaction */
+        spin_lock_irqsave(&ec->curr_lock, tmp);
+        /* following two actions should be kept atomic */
+        ec->curr = t;
+        start_transaction(ec);
+        if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
                 clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
-
-        for (; rdata_len > 0; --rdata_len) {
-                result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll);
-                if (result) {
-                        pr_err(PREFIX "read timeout, command = %d\n", command);
-                        goto end;
-                }
-                /* Don't expect GPE after last read */
-                if (rdata_len > 1)
-                        set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
-                *(rdata++) = acpi_ec_read_data(ec);
-        }
-      end:
+        spin_unlock_irqrestore(&ec->curr_lock, tmp);
+        /* if we selected poll mode or failed in GPE-mode do a poll loop */
+        if (force_poll ||
+            !test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ||
+            acpi_ec_wait(ec))
+                ret = ec_poll(ec);
         pr_debug(PREFIX "transaction end\n");
-        return result;
+        spin_lock_irqsave(&ec->curr_lock, tmp);
+        ec->curr = NULL;
+        spin_unlock_irqrestore(&ec->curr_lock, tmp);
+        if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+                /* check if we received SCI during transaction */
+                ec_check_sci(ec, acpi_ec_read_status(ec));
+                /* it is safe to enable GPE outside of transaction */
+                acpi_enable_gpe(NULL, ec->gpe);
+        } else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
+                   t->irq_count > ACPI_EC_STORM_THRESHOLD) {
+                pr_info(PREFIX "GPE storm detected, "
+                        "transactions will use polling mode\n");
+                set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
+        }
+        return ret;
+}
+
+static int ec_check_ibf0(struct acpi_ec *ec)
+{
+        u8 status = acpi_ec_read_status(ec);
+        return (status & ACPI_EC_FLAG_IBF) == 0;
+}
+
+static int ec_wait_ibf0(struct acpi_ec *ec)
+{
+        unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
+        /* interrupt wait manually if GPE mode is not active */
+        unsigned long timeout = test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ?
+                msecs_to_jiffies(ACPI_EC_DELAY) : msecs_to_jiffies(1);
+        while (time_before(jiffies, delay))
+                if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), timeout))
+                        return 0;
+        return -ETIME;
 }
 
-static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
-                               const u8 * wdata, unsigned wdata_len,
-                               u8 * rdata, unsigned rdata_len,
+static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t,
                                int force_poll)
 {
         int status;
         u32 glk;
-
-        if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
+        if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))
                 return -EINVAL;
-
-        if (rdata)
-                memset(rdata, 0, rdata_len);
-
+        if (t->rdata)
+                memset(t->rdata, 0, t->rlen);
         mutex_lock(&ec->lock);
         if (ec->global_lock) {
                 status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
                 if (ACPI_FAILURE(status)) {
-                        mutex_unlock(&ec->lock);
-                        return -ENODEV;
+                        status = -ENODEV;
+                        goto unlock;
                 }
         }
-
-        status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0);
-        if (status) {
+        if (ec_wait_ibf0(ec)) {
                 pr_err(PREFIX "input buffer is not empty, "
                                 "aborting transaction\n");
+                status = -ETIME;
                 goto end;
         }
-
-        status = acpi_ec_transaction_unlocked(ec, command,
-                                              wdata, wdata_len,
-                                              rdata, rdata_len,
-                                              force_poll);
-
-      end:
-
+        status = acpi_ec_transaction_unlocked(ec, t, force_poll);
+end:
         if (ec->global_lock)
                 acpi_release_global_lock(glk);
+unlock:
         mutex_unlock(&ec->lock);
-
         return status;
 }
 
@@ -327,21 +373,32 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
 int acpi_ec_burst_enable(struct acpi_ec *ec)
 {
         u8 d;
-        return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1, 0);
+        struct transaction t = {.command = ACPI_EC_BURST_ENABLE,
+                                .wdata = NULL, .rdata = &d,
+                                .wlen = 0, .rlen = 1};
+
+        return acpi_ec_transaction(ec, &t, 0);
 }
 
 int acpi_ec_burst_disable(struct acpi_ec *ec)
 {
-        return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0, 0);
+        struct transaction t = {.command = ACPI_EC_BURST_DISABLE,
+                                .wdata = NULL, .rdata = NULL,
+                                .wlen = 0, .rlen = 0};
+
+        return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?
+                                acpi_ec_transaction(ec, &t, 0) : 0;
 }
 
 static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
 {
         int result;
         u8 d;
+        struct transaction t = {.command = ACPI_EC_COMMAND_READ,
+                                .wdata = &address, .rdata = &d,
+                                .wlen = 1, .rlen = 1};
 
-        result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
-                                     &address, 1, &d, 1, 0);
+        result = acpi_ec_transaction(ec, &t, 0);
         *data = d;
         return result;
 }
@@ -349,8 +406,11 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
 static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
 {
         u8 wdata[2] = { address, data };
-        return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
-                                   wdata, 2, NULL, 0, 0);
+        struct transaction t = {.command = ACPI_EC_COMMAND_WRITE,
+                                .wdata = wdata, .rdata = NULL,
+                                .wlen = 2, .rlen = 0};
+
+        return acpi_ec_transaction(ec, &t, 0);
 }
 
 /*
@@ -412,12 +472,13 @@ int ec_transaction(u8 command,
                    u8 * rdata, unsigned rdata_len,
                    int force_poll)
 {
+        struct transaction t = {.command = command,
+                                .wdata = wdata, .rdata = rdata,
+                                .wlen = wdata_len, .rlen = rdata_len};
         if (!first_ec)
                 return -ENODEV;
 
-        return acpi_ec_transaction(first_ec, command, wdata,
-                                   wdata_len, rdata, rdata_len,
-                                   force_poll);
+        return acpi_ec_transaction(first_ec, &t, force_poll);
 }
 
 EXPORT_SYMBOL(ec_transaction);
@@ -426,7 +487,9 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
 {
         int result;
         u8 d;
-
+        struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
+                                .wdata = NULL, .rdata = &d,
+                                .wlen = 0, .rlen = 1};
         if (!ec || !data)
                 return -EINVAL;
 
@@ -436,7 +499,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
          * bit to be cleared (and thus clearing the interrupt source).
          */
 
-        result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1, 0);
+        result = acpi_ec_transaction(ec, &t, 0);
         if (result)
                 return result;
 
@@ -513,46 +576,35 @@ static void acpi_ec_gpe_query(void *ec_cxt)
 
 static u32 acpi_ec_gpe_handler(void *data)
 {
-        acpi_status status = AE_OK;
         struct acpi_ec *ec = data;
-        u8 state = acpi_ec_read_status(ec);
+        u8 status;
 
         pr_debug(PREFIX "~~~> interrupt\n");
-        atomic_inc(&ec->irq_count);
-        if (atomic_read(&ec->irq_count) > 5) {
-                pr_err(PREFIX "GPE storm detected, disabling EC GPE\n");
-                ec_switch_to_poll_mode(ec);
-                goto end;
+        status = acpi_ec_read_status(ec);
+
+        if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) {
+                gpe_transaction(ec, status);
+                if (ec_transaction_done(ec) &&
+                    (status & ACPI_EC_FLAG_IBF) == 0)
+                        wake_up(&ec->wait);
         }
-        clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
-        if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))
-                wake_up(&ec->wait);
 
-        if (state & ACPI_EC_FLAG_SCI) {
-                if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
-                        status = acpi_os_execute(OSL_EC_BURST_HANDLER,
-                                acpi_ec_gpe_query, ec);
-        } else if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
-                   !test_bit(EC_FLAGS_NO_GPE, &ec->flags) &&
-                   in_interrupt()) {
+        ec_check_sci(ec, status);
+        if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
+            !test_bit(EC_FLAGS_NO_GPE, &ec->flags)) {
                 /* this is non-query, must be confirmation */
-                if (printk_ratelimit())
-                        pr_info(PREFIX "non-query interrupt received,"
+                if (!test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+                        if (printk_ratelimit())
+                                pr_info(PREFIX "non-query interrupt received,"
+                                        " switching to interrupt mode\n");
+                } else {
+                        /* hush, STORM switches the mode every transaction */
+                        pr_debug(PREFIX "non-query interrupt received,"
                                 " switching to interrupt mode\n");
+                }
                 set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
-                clear_bit(EC_FLAGS_RESCHEDULE_POLL, &ec->flags);
         }
-end:
-        ec_schedule_ec_poll(ec);
-        return ACPI_SUCCESS(status) ?
-            ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
-}
-
-static void do_ec_poll(struct work_struct *work)
-{
-        struct acpi_ec *ec = container_of(work, struct acpi_ec, work.work);
-        atomic_set(&ec->irq_count, 0);
-        (void)acpi_ec_gpe_handler(ec);
+        return ACPI_INTERRUPT_HANDLED;
 }
 
 /* --------------------------------------------------------------------------
@@ -696,8 +748,7 @@ static struct acpi_ec *make_acpi_ec(void)
         mutex_init(&ec->lock);
         init_waitqueue_head(&ec->wait);
         INIT_LIST_HEAD(&ec->list);
-        INIT_DELAYED_WORK_DEFERRABLE(&ec->work, do_ec_poll);
-        atomic_set(&ec->irq_count, 0);
+        spin_lock_init(&ec->curr_lock);
         return ec;
 }
 
@@ -718,6 +769,7 @@ static acpi_status
 ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 {
         acpi_status status;
+        unsigned long long tmp = 0;
 
         struct acpi_ec *ec = context;
         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
@@ -727,31 +779,27 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 
         /* Get GPE bit assignment (EC events). */
         /* TODO: Add support for _GPE returning a package */
-        status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe);
+        status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
         if (ACPI_FAILURE(status))
                 return status;
+        ec->gpe = tmp;
         /* Use the global lock for all EC transactions? */
-        acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
+        tmp = 0;
+        acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
+        ec->global_lock = tmp;
         ec->handle = handle;
         return AE_CTRL_TERMINATE;
 }
 
-static void ec_poll_stop(struct acpi_ec *ec)
-{
-        clear_bit(EC_FLAGS_RESCHEDULE_POLL, &ec->flags);
-        cancel_delayed_work(&ec->work);
-}
-
 static void ec_remove_handlers(struct acpi_ec *ec)
 {
-        ec_poll_stop(ec);
         if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
                                 ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
                 pr_err(PREFIX "failed to remove space handler\n");
         if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe,
                                 &acpi_ec_gpe_handler)))
                 pr_err(PREFIX "failed to remove gpe handler\n");
-        ec->handlers_installed = 0;
+        clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags);
 }
 
 static int acpi_ec_add(struct acpi_device *device)
@@ -788,7 +836,7 @@ static int acpi_ec_add(struct acpi_device *device)
 
         if (!first_ec)
                 first_ec = ec;
-        acpi_driver_data(device) = ec;
+        device->driver_data = ec;
         acpi_ec_add_fs(device);
         pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
                           ec->gpe, ec->command_addr, ec->data_addr);
@@ -813,7 +861,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
         }
         mutex_unlock(&ec->lock);
         acpi_ec_remove_fs(device);
-        acpi_driver_data(device) = NULL;
+        device->driver_data = NULL;
         if (ec == first_ec)
                 first_ec = NULL;
         kfree(ec);
@@ -846,27 +894,36 @@ ec_parse_io_ports(struct acpi_resource *resource, void *context)
 static int ec_install_handlers(struct acpi_ec *ec)
 {
         acpi_status status;
-        if (ec->handlers_installed)
+        if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
                 return 0;
         status = acpi_install_gpe_handler(NULL, ec->gpe,
-                                          ACPI_GPE_EDGE_TRIGGERED,
-                                          &acpi_ec_gpe_handler, ec);
+                                  ACPI_GPE_EDGE_TRIGGERED,
+                                  &acpi_ec_gpe_handler, ec);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
-
         acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
-        acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
-
+        acpi_enable_gpe(NULL, ec->gpe);
         status = acpi_install_address_space_handler(ec->handle,
                                                     ACPI_ADR_SPACE_EC,
                                                     &acpi_ec_space_handler,
                                                     NULL, ec);
         if (ACPI_FAILURE(status)) {
-                acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
-                return -ENODEV;
+                if (status == AE_NOT_FOUND) {
+                        /*
+                         * Maybe OS fails in evaluating the _REG object.
+                         * The AE_NOT_FOUND error will be ignored and OS
+                         * continue to initialize EC.
+                         */
+                        printk(KERN_ERR "Fail in evaluating the _REG object"
+                                " of EC device. Broken bios is suspected.\n");
+                } else {
+                        acpi_remove_gpe_handler(NULL, ec->gpe,
+                                &acpi_ec_gpe_handler);
+                        return -ENODEV;
+                }
         }
 
-        ec->handlers_installed = 1;
+        set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags);
         return 0;
 }
 
@@ -887,7 +944,6 @@ static int acpi_ec_start(struct acpi_device *device)
 
         /* EC is fully operational, allow queries */
         clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
-        ec_schedule_ec_poll(ec);
         return ret;
 }
 
@@ -906,7 +962,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
 
 int __init acpi_boot_ec_enable(void)
 {
-        if (!boot_ec || boot_ec->handlers_installed)
+        if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags))
                 return 0;
         if (!ec_install_handlers(boot_ec)) {
                 first_ec = boot_ec;
@@ -985,7 +1041,7 @@ static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state)
         /* Stop using GPE */
         set_bit(EC_FLAGS_NO_GPE, &ec->flags);
         clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
-        acpi_disable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
+        acpi_disable_gpe(NULL, ec->gpe);
         return 0;
 }
 
@@ -994,7 +1050,7 @@ static int acpi_ec_resume(struct acpi_device *device)
         struct acpi_ec *ec = acpi_driver_data(device);
         /* Enable use of GPE back */
         clear_bit(EC_FLAGS_NO_GPE, &ec->flags);
-        acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
+        acpi_enable_gpe(NULL, ec->gpe);
         return 0;
 }
 
diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
index c5e53aae86f7..f45c74fe745e 100644
--- a/drivers/acpi/events/evgpe.c
+++ b/drivers/acpi/events/evgpe.c
@@ -289,8 +289,6 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
          */
         status = acpi_hw_low_disable_gpe(gpe_event_info);
         return_ACPI_STATUS(status);
-
-        return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
index 73bfd6bf962f..41554f736b68 100644
--- a/drivers/acpi/events/evxfevnt.c
+++ b/drivers/acpi/events/evxfevnt.c
@@ -248,21 +248,15 @@ ACPI_EXPORT_SYMBOL(acpi_set_gpe_type)
  * DESCRIPTION: Enable an ACPI event (general purpose)
  *
  ******************************************************************************/
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
+acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
 {
         acpi_status status = AE_OK;
+        acpi_cpu_flags flags;
         struct acpi_gpe_event_info *gpe_event_info;
 
         ACPI_FUNCTION_TRACE(acpi_enable_gpe);
 
-        /* Use semaphore lock if not executing at interrupt level */
-
-        if (flags & ACPI_NOT_ISR) {
-                status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-                if (ACPI_FAILURE(status)) {
-                        return_ACPI_STATUS(status);
-                }
-        }
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
         /* Ensure that we have a valid GPE number */
 
@@ -277,9 +271,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
         status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
 
       unlock_and_exit:
-        if (flags & ACPI_NOT_ISR) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-        }
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
         return_ACPI_STATUS(status);
 }
 
@@ -299,22 +291,15 @@ ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
  * DESCRIPTION: Disable an ACPI event (general purpose)
  *
  ******************************************************************************/
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
+acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
 {
         acpi_status status = AE_OK;
+        acpi_cpu_flags flags;
         struct acpi_gpe_event_info *gpe_event_info;
 
         ACPI_FUNCTION_TRACE(acpi_disable_gpe);
 
-        /* Use semaphore lock if not executing at interrupt level */
-
-        if (flags & ACPI_NOT_ISR) {
-                status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-                if (ACPI_FAILURE(status)) {
-                        return_ACPI_STATUS(status);
-                }
-        }
-
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
         /* Ensure that we have a valid GPE number */
 
         gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
@@ -325,10 +310,8 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
 
         status = acpi_ev_disable_gpe(gpe_event_info);
 
-      unlock_and_exit:
-        if (flags & ACPI_NOT_ISR) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-        }
+unlock_and_exit:
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
         return_ACPI_STATUS(status);
 }
 
@@ -521,6 +504,9 @@ acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
         if (value)
                 *event_status |= ACPI_EVENT_FLAG_SET;
 
+        if (acpi_gbl_fixed_event_handlers[event].handler)
+                *event_status |= ACPI_EVENT_FLAG_HANDLE;
+
         return_ACPI_STATUS(status);
 }
 
@@ -571,6 +557,9 @@ acpi_get_gpe_status(acpi_handle gpe_device,
 
         status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
 
+        if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
+                *event_status |= ACPI_EVENT_FLAG_HANDLE;
+
       unlock_and_exit:
         if (flags & ACPI_NOT_ISR) {
                 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c
index 8892b9824fae..74da6fa52ef1 100644
--- a/drivers/acpi/executer/exconfig.c
+++ b/drivers/acpi/executer/exconfig.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acinterp.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 #include <acpi/actables.h>
 #include <acpi/acdispat.h>
@@ -91,13 +90,12 @@ acpi_ex_add_table(u32 table_index,
 
         /* Init the table handle */
 
-        obj_desc->reference.opcode = AML_LOAD_OP;
+        obj_desc->reference.class = ACPI_REFCLASS_TABLE;
         *ddb_handle = obj_desc;
 
         /* Install the new table into the local data structures */
 
-        obj_desc->reference.object = ACPI_CAST_PTR(void,
-                        (unsigned long)table_index);
+        obj_desc->reference.value = table_index;
 
         /* Add the table to the namespace */
 
@@ -280,6 +278,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
                 struct acpi_walk_state *walk_state)
 {
         union acpi_operand_object *ddb_handle;
+        struct acpi_table_header *table;
         struct acpi_table_desc table_desc;
         u32 table_index;
         acpi_status status;
@@ -294,9 +293,8 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
         case ACPI_TYPE_REGION:
 
-                ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n",
-                                  obj_desc,
-                                  acpi_ut_get_object_type_name(obj_desc)));
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "Load table from Region %p\n", obj_desc));
 
                 /* Region must be system_memory (from ACPI spec) */
 
@@ -316,61 +314,112 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
                 }
 
                 /*
-                 * We will simply map the memory region for the table. However, the
-                 * memory region is technically not guaranteed to remain stable and
-                 * we may eventually have to copy the table to a local buffer.
+                 * Map the table header and get the actual table length. The region
+                 * length is not guaranteed to be the same as the table length.
+                 */
+                table = acpi_os_map_memory(obj_desc->region.address,
+                                           sizeof(struct acpi_table_header));
+                if (!table) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                length = table->length;
+                acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
+
+                /* Must have at least an ACPI table header */
+
+                if (length < sizeof(struct acpi_table_header)) {
+                        return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+                }
+
+                /*
+                 * The memory region is not guaranteed to remain stable and we must
+                 * copy the table to a local buffer. For example, the memory region
+                 * is corrupted after suspend on some machines. Dynamically loaded
+                 * tables are usually small, so this overhead is minimal.
                  */
+
+                /* Allocate a buffer for the table */
+
+                table_desc.pointer = ACPI_ALLOCATE(length);
+                if (!table_desc.pointer) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                /* Map the entire table and copy it */
+
+                table = acpi_os_map_memory(obj_desc->region.address, length);
+                if (!table) {
+                        ACPI_FREE(table_desc.pointer);
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                ACPI_MEMCPY(table_desc.pointer, table, length);
+                acpi_os_unmap_memory(table, length);
+
                 table_desc.address = obj_desc->region.address;
-                table_desc.length = obj_desc->region.length;
-                table_desc.flags = ACPI_TABLE_ORIGIN_MAPPED;
                 break;
 
         case ACPI_TYPE_BUFFER:  /* Buffer or resolved region_field */
 
                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
-                                  "Load from Buffer or Field %p %s\n", obj_desc,
-                                  acpi_ut_get_object_type_name(obj_desc)));
-
-                length = obj_desc->buffer.length;
+                                  "Load table from Buffer or Field %p\n",
+                                  obj_desc));
 
                 /* Must have at least an ACPI table header */
 
-                if (length < sizeof(struct acpi_table_header)) {
+                if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
                         return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
                 }
 
-                /* Validate checksum here. It won't get validated in tb_add_table */
+                /* Get the actual table length from the table header */
 
-                status =
-                    acpi_tb_verify_checksum(ACPI_CAST_PTR
-                                            (struct acpi_table_header,
-                                             obj_desc->buffer.pointer), length);
-                if (ACPI_FAILURE(status)) {
-                        return_ACPI_STATUS(status);
+                table =
+                    ACPI_CAST_PTR(struct acpi_table_header,
+                                  obj_desc->buffer.pointer);
+                length = table->length;
+
+                /* Table cannot extend beyond the buffer */
+
+                if (length > obj_desc->buffer.length) {
+                        return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
+                }
+                if (length < sizeof(struct acpi_table_header)) {
+                        return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
                 }
 
                 /*
-                 * We need to copy the buffer since the original buffer could be
-                 * changed or deleted in the future
+                 * Copy the table from the buffer because the buffer could be modified
+                 * or even deleted in the future
                  */
                 table_desc.pointer = ACPI_ALLOCATE(length);
                 if (!table_desc.pointer) {
                         return_ACPI_STATUS(AE_NO_MEMORY);
                 }
 
-                ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer,
-                            length);
-                table_desc.length = length;
-                table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+                ACPI_MEMCPY(table_desc.pointer, table, length);
+                table_desc.address = ACPI_TO_INTEGER(table_desc.pointer);
                 break;
 
         default:
                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
         }
 
-        /*
-         * Install the new table into the local data structures
-         */
+        /* Validate table checksum (will not get validated in tb_add_table) */
+
+        status = acpi_tb_verify_checksum(table_desc.pointer, length);
+        if (ACPI_FAILURE(status)) {
+                ACPI_FREE(table_desc.pointer);
+                return_ACPI_STATUS(status);
+        }
+
+        /* Complete the table descriptor */
+
+        table_desc.length = length;
+        table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+
+        /* Install the new table into the local data structures */
+
         status = acpi_tb_add_table(&table_desc, &table_index);
         if (ACPI_FAILURE(status)) {
                 goto cleanup;
@@ -379,7 +428,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
         /*
          * Add the table to the namespace.
          *
-         * Note: We load the table objects relative to the root of the namespace.
+         * Note: Load the table objects relative to the root of the namespace.
          * This appears to go against the ACPI specification, but we do it for
          * compatibility with other ACPI implementations.
          */
@@ -415,7 +464,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
       cleanup:
         if (ACPI_FAILURE(status)) {
 
-                /* Delete allocated buffer or mapping */
+                /* Delete allocated table buffer */
 
                 acpi_tb_delete_table(&table_desc);
         }
@@ -455,9 +504,9 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
                 return_ACPI_STATUS(AE_BAD_PARAMETER);
         }
 
-        /* Get the table index from the ddb_handle (acpi_size for 64-bit case) */
+        /* Get the table index from the ddb_handle */
 
-        table_index = (u32) (acpi_size) table_desc->reference.object;
+        table_index = table_desc->reference.value;
 
         /* Invoke table handler if present */
 
diff --git a/drivers/acpi/executer/exconvrt.c b/drivers/acpi/executer/exconvrt.c
index 261d97516d9b..1d1f35adddde 100644
--- a/drivers/acpi/executer/exconvrt.c
+++ b/drivers/acpi/executer/exconvrt.c
@@ -57,7 +57,7 @@ acpi_ex_convert_to_ascii(acpi_integer integer,
  *
  * FUNCTION:    acpi_ex_convert_to_integer
  *
- * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ * PARAMETERS:  obj_desc        - Object to be converted. Must be an
  *                                Integer, Buffer, or String
  *              result_desc     - Where the new Integer object is returned
  *              Flags           - Used for string conversion
@@ -103,7 +103,7 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
         }
 
         /*
-         * Convert the buffer/string to an integer.  Note that both buffers and
+         * Convert the buffer/string to an integer. Note that both buffers and
          * strings are treated as raw data - we don't convert ascii to hex for
          * strings.
          *
@@ -120,7 +120,7 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
 
                 /*
                  * Convert string to an integer - for most cases, the string must be
-                 * hexadecimal as per the ACPI specification.  The only exception (as
+                 * hexadecimal as per the ACPI specification. The only exception (as
                  * of ACPI 3.0) is that the to_integer() operator allows both decimal
                  * and hexadecimal strings (hex prefixed with "0x").
                  */
@@ -159,6 +159,7 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
                 break;
 
         default:
+
                 /* No other types can get here */
                 break;
         }
@@ -185,7 +186,7 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
  *
  * FUNCTION:    acpi_ex_convert_to_buffer
  *
- * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ * PARAMETERS:  obj_desc        - Object to be converted. Must be an
  *                                Integer, Buffer, or String
  *              result_desc     - Where the new buffer object is returned
  *
@@ -365,7 +366,7 @@ acpi_ex_convert_to_ascii(acpi_integer integer,
         }
 
         /*
-         * Since leading zeros are supressed, we must check for the case where
+         * Since leading zeros are suppressed, we must check for the case where
          * the integer equals 0
          *
          * Finally, null terminate the string and return the length
@@ -383,7 +384,7 @@ acpi_ex_convert_to_ascii(acpi_integer integer,
  *
  * FUNCTION:    acpi_ex_convert_to_string
  *
- * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ * PARAMETERS:  obj_desc        - Object to be converted. Must be an
  *                                Integer, Buffer, or String
  *              result_desc     - Where the string object is returned
  *              Type            - String flags (base and conversion type)
@@ -472,7 +473,7 @@ acpi_ex_convert_to_string(union acpi_operand_object * obj_desc,
                         base = 10;
 
                         /*
-                         * Calculate the final string length.  Individual string values
+                         * Calculate the final string length. Individual string values
                          * are variable length (include separator for each)
                          */
                         for (i = 0; i < obj_desc->buffer.length; i++) {
@@ -511,9 +512,14 @@ acpi_ex_convert_to_string(union acpi_operand_object * obj_desc,
                 /*
                  * Create a new string object and string buffer
                  * (-1 because of extra separator included in string_length from above)
+                 * Allow creation of zero-length strings from zero-length buffers.
                  */
+                if (string_length) {
+                        string_length--;
+                }
+
                 return_desc = acpi_ut_create_string_object((acpi_size)
-                                                           (string_length - 1));
+                                                           string_length);
                 if (!return_desc) {
                         return_ACPI_STATUS(AE_NO_MEMORY);
                 }
@@ -536,7 +542,9 @@ acpi_ex_convert_to_string(union acpi_operand_object * obj_desc,
                  * Null terminate the string
                  * (overwrites final comma/space from above)
                  */
-                new_buf--;
+                if (obj_desc->buffer.length) {
+                        new_buf--;
+                }
                 *new_buf = 0;
                 break;
 
@@ -617,7 +625,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
                 case ACPI_TYPE_LOCAL_BANK_FIELD:
                 case ACPI_TYPE_LOCAL_INDEX_FIELD:
                         /*
-                         * These types require an Integer operand.  We can convert
+                         * These types require an Integer operand. We can convert
                          * a Buffer or a String to an Integer if necessary.
                          */
                         status =
@@ -627,7 +635,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
 
                 case ACPI_TYPE_STRING:
                         /*
-                         * The operand must be a String.  We can convert an
+                         * The operand must be a String. We can convert an
                          * Integer or Buffer if necessary
                          */
                         status =
@@ -637,7 +645,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
 
                 case ACPI_TYPE_BUFFER:
                         /*
-                         * The operand must be a Buffer.  We can convert an
+                         * The operand must be a Buffer. We can convert an
                          * Integer or String if necessary
                          */
                         status =
diff --git a/drivers/acpi/executer/exdump.c b/drivers/acpi/executer/exdump.c
index 2be2e2bf95bf..d087a7d28aa5 100644
--- a/drivers/acpi/executer/exdump.c
+++ b/drivers/acpi/executer/exdump.c
@@ -45,7 +45,6 @@
 #include <acpi/acinterp.h>
 #include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
 
 #define _COMPONENT          ACPI_EXECUTER
 ACPI_MODULE_NAME("exdump")
@@ -214,10 +213,11 @@ static struct acpi_exdump_info acpi_ex_dump_index_field[5] = {
         {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(index_field.data_obj), "Data Object"}
 };
 
-static struct acpi_exdump_info acpi_ex_dump_reference[7] = {
+static struct acpi_exdump_info acpi_ex_dump_reference[8] = {
         {ACPI_EXD_INIT, ACPI_EXD_TABLE_SIZE(acpi_ex_dump_reference), NULL},
+        {ACPI_EXD_UINT8, ACPI_EXD_OFFSET(reference.class), "Class"},
         {ACPI_EXD_UINT8, ACPI_EXD_OFFSET(reference.target_type), "Target Type"},
-        {ACPI_EXD_UINT32, ACPI_EXD_OFFSET(reference.offset), "Offset"},
+        {ACPI_EXD_UINT32, ACPI_EXD_OFFSET(reference.value), "Value"},
         {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(reference.object), "Object Desc"},
         {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(reference.node), "Node"},
         {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(reference.where), "Where"},
@@ -413,10 +413,10 @@ acpi_ex_dump_object(union acpi_operand_object *obj_desc,
 
                 case ACPI_EXD_REFERENCE:
 
-                        acpi_ex_out_string("Opcode",
-                                           (acpi_ps_get_opcode_info
-                                            (obj_desc->reference.opcode))->
-                                           name);
+                        acpi_ex_out_string("Class Name",
+                                           (char *)
+                                           acpi_ut_get_reference_name
+                                           (obj_desc));
                         acpi_ex_dump_reference_obj(obj_desc);
                         break;
 
@@ -494,40 +494,41 @@ void acpi_ex_dump_operand(union acpi_operand_object *obj_desc, u32 depth)
         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                switch (obj_desc->reference.opcode) {
-                case AML_DEBUG_OP:
+                acpi_os_printf("Reference: [%s] ",
+                               acpi_ut_get_reference_name(obj_desc));
+
+                switch (obj_desc->reference.class) {
+                case ACPI_REFCLASS_DEBUG:
 
-                        acpi_os_printf("Reference: Debug\n");
+                        acpi_os_printf("\n");
                         break;
 
-                case AML_INDEX_OP:
+                case ACPI_REFCLASS_INDEX:
 
-                        acpi_os_printf("Reference: Index %p\n",
-                                       obj_desc->reference.object);
+                        acpi_os_printf("%p\n", obj_desc->reference.object);
                         break;
 
-                case AML_LOAD_OP:
+                case ACPI_REFCLASS_TABLE:
 
-                        acpi_os_printf("Reference: [DdbHandle] TableIndex %p\n",
-                                       obj_desc->reference.object);
+                        acpi_os_printf("Table Index %X\n",
+                                       obj_desc->reference.value);
                         break;
 
-                case AML_REF_OF_OP:
+                case ACPI_REFCLASS_REFOF:
 
-                        acpi_os_printf("Reference: (RefOf) %p [%s]\n",
-                                       obj_desc->reference.object,
+                        acpi_os_printf("%p [%s]\n", obj_desc->reference.object,
                                        acpi_ut_get_type_name(((union
                                                                acpi_operand_object
-                                                               *)obj_desc->
+                                                               *)
+                                                              obj_desc->
                                                               reference.
                                                               object)->common.
                                                              type));
                         break;
 
-                case AML_ARG_OP:
+                case ACPI_REFCLASS_ARG:
 
-                        acpi_os_printf("Reference: Arg%d",
-                                       obj_desc->reference.offset);
+                        acpi_os_printf("%X", obj_desc->reference.value);
 
                         if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
 
@@ -542,10 +543,9 @@ void acpi_ex_dump_operand(union acpi_operand_object *obj_desc, u32 depth)
                         acpi_os_printf("\n");
                         break;
 
-                case AML_LOCAL_OP:
+                case ACPI_REFCLASS_LOCAL:
 
-                        acpi_os_printf("Reference: Local%d",
-                                       obj_desc->reference.offset);
+                        acpi_os_printf("%X", obj_desc->reference.value);
 
                         if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
 
@@ -560,21 +560,16 @@ void acpi_ex_dump_operand(union acpi_operand_object *obj_desc, u32 depth)
                         acpi_os_printf("\n");
                         break;
 
-                case AML_INT_NAMEPATH_OP:
+                case ACPI_REFCLASS_NAME:
 
-                        acpi_os_printf("Reference: Namepath %X [%4.4s]\n",
-                                       obj_desc->reference.node->name.integer,
+                        acpi_os_printf("- [%4.4s]\n",
                                        obj_desc->reference.node->name.ascii);
                         break;
 
-                default:
-
-                        /* Unknown opcode */
+                default:        /* Unknown reference class */
 
-                        acpi_os_printf("Unknown Reference opcode=%X\n",
-                                       obj_desc->reference.opcode);
+                        acpi_os_printf("%2.2X\n", obj_desc->reference.class);
                         break;
-
                 }
                 break;
 
@@ -865,8 +860,8 @@ static void acpi_ex_dump_reference_obj(union acpi_operand_object *obj_desc)
 
         ret_buf.length = ACPI_ALLOCATE_LOCAL_BUFFER;
 
-        if (obj_desc->reference.opcode == AML_INT_NAMEPATH_OP) {
-                acpi_os_printf(" Named Object %p ", obj_desc->reference.node);
+        if (obj_desc->reference.class == ACPI_REFCLASS_NAME) {
+                acpi_os_printf(" %p ", obj_desc->reference.node);
 
                 status =
                     acpi_ns_handle_to_pathname(obj_desc->reference.node,
@@ -882,14 +877,12 @@ static void acpi_ex_dump_reference_obj(union acpi_operand_object *obj_desc)
                     ACPI_DESC_TYPE_OPERAND) {
                         acpi_os_printf(" Target: %p",
                                        obj_desc->reference.object);
-                        if (obj_desc->reference.opcode == AML_LOAD_OP) {
-                                /*
-                                 * For DDBHandle reference,
-                                 * obj_desc->Reference.Object is the table index
-                                 */
-                                acpi_os_printf(" [DDBHandle]\n");
+                        if (obj_desc->reference.class == ACPI_REFCLASS_TABLE) {
+                                acpi_os_printf(" Table Index: %X\n",
+                                               obj_desc->reference.value);
                         } else {
-                                acpi_os_printf(" [%s]\n",
+                                acpi_os_printf(" Target: %p [%s]\n",
+                                               obj_desc->reference.object,
                                                acpi_ut_get_type_name(((union
                                                                        acpi_operand_object
                                                                        *)
@@ -988,9 +981,9 @@ acpi_ex_dump_package_obj(union acpi_operand_object *obj_desc,
 
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                acpi_os_printf("[Object Reference] %s",
-                               (acpi_ps_get_opcode_info
-                                (obj_desc->reference.opcode))->name);
+                acpi_os_printf("[Object Reference] Type [%s] %2.2X",
+                               acpi_ut_get_reference_name(obj_desc),
+                               obj_desc->reference.class);
                 acpi_ex_dump_reference_obj(obj_desc);
                 break;
 
diff --git a/drivers/acpi/executer/exmisc.c b/drivers/acpi/executer/exmisc.c
index 731414a581a6..efb191340059 100644
--- a/drivers/acpi/executer/exmisc.c
+++ b/drivers/acpi/executer/exmisc.c
@@ -86,10 +86,10 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
                 /*
                  * Must be a reference to a Local or Arg
                  */
-                switch (obj_desc->reference.opcode) {
-                case AML_LOCAL_OP:
-                case AML_ARG_OP:
-                case AML_DEBUG_OP:
+                switch (obj_desc->reference.class) {
+                case ACPI_REFCLASS_LOCAL:
+                case ACPI_REFCLASS_ARG:
+                case ACPI_REFCLASS_DEBUG:
 
                         /* The referenced object is the pseudo-node for the local/arg */
 
@@ -98,8 +98,8 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
 
                 default:
 
-                        ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X",
-                                    obj_desc->reference.opcode));
+                        ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
+                                    obj_desc->reference.class));
                         return_ACPI_STATUS(AE_AML_INTERNAL);
                 }
                 break;
@@ -127,7 +127,7 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
                 return_ACPI_STATUS(AE_NO_MEMORY);
         }
 
-        reference_obj->reference.opcode = AML_REF_OF_OP;
+        reference_obj->reference.class = ACPI_REFCLASS_REFOF;
         reference_obj->reference.object = referenced_obj;
         *return_desc = reference_obj;
 
diff --git a/drivers/acpi/executer/exoparg1.c b/drivers/acpi/executer/exoparg1.c
index 7c3bea575e02..f622f9eac8a1 100644
--- a/drivers/acpi/executer/exoparg1.c
+++ b/drivers/acpi/executer/exoparg1.c
@@ -825,16 +825,16 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                                  *
                                  * Must resolve/dereference the local/arg reference first
                                  */
-                                switch (operand[0]->reference.opcode) {
-                                case AML_LOCAL_OP:
-                                case AML_ARG_OP:
+                                switch (operand[0]->reference.class) {
+                                case ACPI_REFCLASS_LOCAL:
+                                case ACPI_REFCLASS_ARG:
 
                                         /* Set Operand[0] to the value of the local/arg */
 
                                         status =
                                             acpi_ds_method_data_get_value
-                                            (operand[0]->reference.opcode,
-                                             operand[0]->reference.offset,
+                                            (operand[0]->reference.class,
+                                             operand[0]->reference.value,
                                              walk_state, &temp_desc);
                                         if (ACPI_FAILURE(status)) {
                                                 goto cleanup;
@@ -848,7 +848,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                                         operand[0] = temp_desc;
                                         break;
 
-                                case AML_REF_OF_OP:
+                                case ACPI_REFCLASS_REFOF:
 
                                         /* Get the object to which the reference refers */
 
@@ -928,8 +928,8 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                          * This must be a reference object produced by either the
                          * Index() or ref_of() operator
                          */
-                        switch (operand[0]->reference.opcode) {
-                        case AML_INDEX_OP:
+                        switch (operand[0]->reference.class) {
+                        case ACPI_REFCLASS_INDEX:
 
                                 /*
                                  * The target type for the Index operator must be
@@ -965,7 +965,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                                         return_desc->integer.value =
                                             temp_desc->buffer.
                                             pointer[operand[0]->reference.
-                                                    offset];
+                                                    value];
                                         break;
 
                                 case ACPI_TYPE_PACKAGE:
@@ -985,7 +985,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                                 default:
 
                                         ACPI_ERROR((AE_INFO,
-                                                    "Unknown Index TargetType %X in obj %p",
+                                                    "Unknown Index TargetType %X in reference object %p",
                                                     operand[0]->reference.
                                                     target_type, operand[0]));
                                         status = AE_AML_OPERAND_TYPE;
@@ -993,7 +993,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
                                 }
                                 break;
 
-                        case AML_REF_OF_OP:
+                        case ACPI_REFCLASS_REFOF:
 
                                 return_desc = operand[0]->reference.object;
 
@@ -1013,9 +1013,9 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
 
                         default:
                                 ACPI_ERROR((AE_INFO,
-                                            "Unknown opcode in reference(%p) - %X",
+                                            "Unknown class in reference(%p) - %2.2X",
                                             operand[0],
-                                            operand[0]->reference.opcode));
+                                            operand[0]->reference.class));
 
                                 status = AE_TYPE;
                                 goto cleanup;
diff --git a/drivers/acpi/executer/exoparg2.c b/drivers/acpi/executer/exoparg2.c
index 8e8bbb6ccebd..368def5dffce 100644
--- a/drivers/acpi/executer/exoparg2.c
+++ b/drivers/acpi/executer/exoparg2.c
@@ -391,8 +391,8 @@ acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
                 /* Initialize the Index reference object */
 
                 index = operand[1]->integer.value;
-                return_desc->reference.offset = (u32) index;
-                return_desc->reference.opcode = AML_INDEX_OP;
+                return_desc->reference.value = (u32) index;
+                return_desc->reference.class = ACPI_REFCLASS_INDEX;
 
                 /*
                  * At this point, the Source operand is a String, Buffer, or Package.
diff --git a/drivers/acpi/executer/exresnte.c b/drivers/acpi/executer/exresnte.c
index 5596f42c9676..423ad3635f3d 100644
--- a/drivers/acpi/executer/exresnte.c
+++ b/drivers/acpi/executer/exresnte.c
@@ -46,8 +46,6 @@
 #include <acpi/acdispat.h>
 #include <acpi/acinterp.h>
 #include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
-#include <acpi/amlcode.h>
 
 #define _COMPONENT          ACPI_EXECUTER
 ACPI_MODULE_NAME("exresnte")
@@ -238,10 +236,10 @@ acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
 
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                switch (source_desc->reference.opcode) {
-                case AML_LOAD_OP:       /* This is a ddb_handle */
-                case AML_REF_OF_OP:
-                case AML_INDEX_OP:
+                switch (source_desc->reference.class) {
+                case ACPI_REFCLASS_TABLE:       /* This is a ddb_handle */
+                case ACPI_REFCLASS_REFOF:
+                case ACPI_REFCLASS_INDEX:
 
                         /* Return an additional reference to the object */
 
@@ -253,10 +251,8 @@ acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
                         /* No named references are allowed here */
 
                         ACPI_ERROR((AE_INFO,
-                                    "Unsupported Reference opcode %X (%s)",
-                                    source_desc->reference.opcode,
-                                    acpi_ps_get_opcode_name(source_desc->
-                                                            reference.opcode)));
+                                    "Unsupported Reference type %X",
+                                    source_desc->reference.class));
 
                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
                 }
diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c
index b35f7c817acf..89571b92a522 100644
--- a/drivers/acpi/executer/exresolv.c
+++ b/drivers/acpi/executer/exresolv.c
@@ -47,7 +47,6 @@
 #include <acpi/acdispat.h>
 #include <acpi/acinterp.h>
 #include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
 
 #define _COMPONENT          ACPI_EXECUTER
 ACPI_MODULE_NAME("exresolv")
@@ -141,7 +140,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
         acpi_status status = AE_OK;
         union acpi_operand_object *stack_desc;
         union acpi_operand_object *obj_desc = NULL;
-        u16 opcode;
+        u8 ref_type;
 
         ACPI_FUNCTION_TRACE(ex_resolve_object_to_value);
 
@@ -152,19 +151,19 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
         switch (ACPI_GET_OBJECT_TYPE(stack_desc)) {
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                opcode = stack_desc->reference.opcode;
+                ref_type = stack_desc->reference.class;
 
-                switch (opcode) {
-                case AML_LOCAL_OP:
-                case AML_ARG_OP:
+                switch (ref_type) {
+                case ACPI_REFCLASS_LOCAL:
+                case ACPI_REFCLASS_ARG:
 
                         /*
                          * Get the local from the method's state info
                          * Note: this increments the local's object reference count
                          */
-                        status = acpi_ds_method_data_get_value(opcode,
+                        status = acpi_ds_method_data_get_value(ref_type,
                                                                stack_desc->
-                                                               reference.offset,
+                                                               reference.value,
                                                                walk_state,
                                                                &obj_desc);
                         if (ACPI_FAILURE(status)) {
@@ -173,7 +172,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
 
                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                                           "[Arg/Local %X] ValueObj is %p\n",
-                                          stack_desc->reference.offset,
+                                          stack_desc->reference.value,
                                           obj_desc));
 
                         /*
@@ -184,7 +183,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
                         *stack_ptr = obj_desc;
                         break;
 
-                case AML_INDEX_OP:
+                case ACPI_REFCLASS_INDEX:
 
                         switch (stack_desc->reference.target_type) {
                         case ACPI_TYPE_BUFFER_FIELD:
@@ -239,15 +238,15 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
                         }
                         break;
 
-                case AML_REF_OF_OP:
-                case AML_DEBUG_OP:
-                case AML_LOAD_OP:
+                case ACPI_REFCLASS_REFOF:
+                case ACPI_REFCLASS_DEBUG:
+                case ACPI_REFCLASS_TABLE:
 
                         /* Just leave the object as-is, do not dereference */
 
                         break;
 
-                case AML_INT_NAMEPATH_OP:       /* Reference to a named object */
+                case ACPI_REFCLASS_NAME:        /* Reference to a named object */
 
                         /* Dereference the name */
 
@@ -273,8 +272,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
                 default:
 
                         ACPI_ERROR((AE_INFO,
-                                    "Unknown Reference opcode %X (%s) in %p",
-                                    opcode, acpi_ps_get_opcode_name(opcode),
+                                    "Unknown Reference type %X in %p", ref_type,
                                     stack_desc));
                         status = AE_AML_INTERNAL;
                         break;
@@ -388,13 +386,13 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
          * traversing the list of possibly many nested references.
          */
         while (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
-                switch (obj_desc->reference.opcode) {
-                case AML_REF_OF_OP:
-                case AML_INT_NAMEPATH_OP:
+                switch (obj_desc->reference.class) {
+                case ACPI_REFCLASS_REFOF:
+                case ACPI_REFCLASS_NAME:
 
                         /* Dereference the reference pointer */
 
-                        if (obj_desc->reference.opcode == AML_REF_OF_OP) {
+                        if (obj_desc->reference.class == ACPI_REFCLASS_REFOF) {
                                 node = obj_desc->reference.object;
                         } else {        /* AML_INT_NAMEPATH_OP */
 
@@ -429,7 +427,7 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
                         }
                         break;
 
-                case AML_INDEX_OP:
+                case ACPI_REFCLASS_INDEX:
 
                         /* Get the type of this reference (index into another object) */
 
@@ -455,22 +453,22 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
                         }
                         break;
 
-                case AML_LOAD_OP:
+                case ACPI_REFCLASS_TABLE:
 
                         type = ACPI_TYPE_DDB_HANDLE;
                         goto exit;
 
-                case AML_LOCAL_OP:
-                case AML_ARG_OP:
+                case ACPI_REFCLASS_LOCAL:
+                case ACPI_REFCLASS_ARG:
 
                         if (return_desc) {
                                 status =
                                     acpi_ds_method_data_get_value(obj_desc->
                                                                   reference.
-                                                                  opcode,
+                                                                  class,
                                                                   obj_desc->
                                                                   reference.
-                                                                  offset,
+                                                                  value,
                                                                   walk_state,
                                                                   &obj_desc);
                                 if (ACPI_FAILURE(status)) {
@@ -481,10 +479,10 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
                                 status =
                                     acpi_ds_method_data_get_node(obj_desc->
                                                                  reference.
-                                                                 opcode,
+                                                                 class,
                                                                  obj_desc->
                                                                  reference.
-                                                                 offset,
+                                                                 value,
                                                                  walk_state,
                                                                  &node);
                                 if (ACPI_FAILURE(status)) {
@@ -499,7 +497,7 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
                         }
                         break;
 
-                case AML_DEBUG_OP:
+                case ACPI_REFCLASS_DEBUG:
 
                         /* The Debug Object is of type "DebugObject" */
 
@@ -509,8 +507,8 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
                 default:
 
                         ACPI_ERROR((AE_INFO,
-                                    "Unknown Reference subtype %X",
-                                    obj_desc->reference.opcode));
+                                    "Unknown Reference Class %2.2X",
+                                    obj_desc->reference.class));
                         return_ACPI_STATUS(AE_AML_INTERNAL);
                 }
         }
diff --git a/drivers/acpi/executer/exresop.c b/drivers/acpi/executer/exresop.c
index 54085f16ec28..0bb82593da72 100644
--- a/drivers/acpi/executer/exresop.c
+++ b/drivers/acpi/executer/exresop.c
@@ -225,41 +225,36 @@ acpi_ex_resolve_operands(u16 opcode,
 
                         if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
 
-                                /* Decode the Reference */
+                                /* Validate the Reference */
 
-                                op_info = acpi_ps_get_opcode_info(opcode);
-                                if (op_info->class == AML_CLASS_UNKNOWN) {
-                                        return_ACPI_STATUS(AE_AML_BAD_OPCODE);
-                                }
+                                switch (obj_desc->reference.class) {
+                                case ACPI_REFCLASS_DEBUG:
 
-                                switch (obj_desc->reference.opcode) {
-                                case AML_DEBUG_OP:
                                         target_op = AML_DEBUG_OP;
 
                                         /*lint -fallthrough */
 
-                                case AML_INDEX_OP:
-                                case AML_REF_OF_OP:
-                                case AML_ARG_OP:
-                                case AML_LOCAL_OP:
-                                case AML_LOAD_OP:       /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
-                                case AML_INT_NAMEPATH_OP:       /* Reference to a named object */
-
-                                        ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT
-                                                                ((ACPI_DB_EXEC,
-                                                                  "Operand is a Reference, RefOpcode [%s]\n",
-                                                                  (acpi_ps_get_opcode_info
-                                                                   (obj_desc->
-                                                                    reference.
-                                                                    opcode))->
-                                                                  name)));
+                                case ACPI_REFCLASS_ARG:
+                                case ACPI_REFCLASS_LOCAL:
+                                case ACPI_REFCLASS_INDEX:
+                                case ACPI_REFCLASS_REFOF:
+                                case ACPI_REFCLASS_TABLE:       /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
+                                case ACPI_REFCLASS_NAME:        /* Reference to a named object */
+
+                                        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                                          "Operand is a Reference, Class [%s] %2.2X\n",
+                                                          acpi_ut_get_reference_name
+                                                          (obj_desc),
+                                                          obj_desc->reference.
+                                                          class));
                                         break;
 
                                 default:
+
                                         ACPI_ERROR((AE_INFO,
-                                                    "Operand is a Reference, Unknown Reference Opcode: %X",
-                                                    obj_desc->reference.
-                                                    opcode));
+                                                    "Unknown Reference Class %2.2X in %p",
+                                                    obj_desc->reference.class,
+                                                    obj_desc));
 
                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
                                 }
@@ -270,8 +265,7 @@ acpi_ex_resolve_operands(u16 opcode,
 
                         /* Invalid descriptor */
 
-                        ACPI_ERROR((AE_INFO,
-                                    "Invalid descriptor %p [%s]",
+                        ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
                                     obj_desc,
                                     acpi_ut_get_descriptor_name(obj_desc)));
 
@@ -343,7 +337,7 @@ acpi_ex_resolve_operands(u16 opcode,
                         if ((opcode == AML_STORE_OP) &&
                             (ACPI_GET_OBJECT_TYPE(*stack_ptr) ==
                              ACPI_TYPE_LOCAL_REFERENCE)
-                            && ((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {
+                            && ((*stack_ptr)->reference.class == ACPI_REFCLASS_INDEX)) {
                                 goto next_operand;
                         }
                         break;
diff --git a/drivers/acpi/executer/exstore.c b/drivers/acpi/executer/exstore.c
index 38b55e352495..3318df4cbd98 100644
--- a/drivers/acpi/executer/exstore.c
+++ b/drivers/acpi/executer/exstore.c
@@ -47,7 +47,6 @@
 #include <acpi/acinterp.h>
 #include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
 
 #define _COMPONENT          ACPI_EXECUTER
 ACPI_MODULE_NAME("exstore")
@@ -179,22 +178,26 @@ acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
 
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                if (source_desc->reference.opcode == AML_INDEX_OP) {
-                        ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-                                              "[%s, 0x%X]\n",
-                                              acpi_ps_get_opcode_name
-                                              (source_desc->reference.opcode),
-                                              source_desc->reference.offset));
-                } else {
-                        ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s]",
-                                              acpi_ps_get_opcode_name
-                                              (source_desc->reference.opcode)));
-                }
+                ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ",
+                                      acpi_ut_get_reference_name(source_desc)));
+
+                /* Decode the reference */
+
+                switch (source_desc->reference.class) {
+                case ACPI_REFCLASS_INDEX:
+
+                        ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n",
+                                              source_desc->reference.value));
+                        break;
+
+                case ACPI_REFCLASS_TABLE:
 
-                if (source_desc->reference.opcode == AML_LOAD_OP) {     /* Load and load_table */
                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-                                              " Table OwnerId %p\n",
-                                              source_desc->reference.object));
+                                              "Table Index 0x%X\n",
+                                              source_desc->reference.value));
+                        break;
+
+                default:
                         break;
                 }
 
@@ -347,15 +350,15 @@ acpi_ex_store(union acpi_operand_object *source_desc,
         }
 
         /*
-         * Examine the Reference opcode.  These cases are handled:
+         * Examine the Reference class. These cases are handled:
          *
          * 1) Store to Name (Change the object associated with a name)
          * 2) Store to an indexed area of a Buffer or Package
          * 3) Store to a Method Local or Arg
          * 4) Store to the debug object
          */
-        switch (ref_desc->reference.opcode) {
-        case AML_REF_OF_OP:
+        switch (ref_desc->reference.class) {
+        case ACPI_REFCLASS_REFOF:
 
                 /* Storing an object into a Name "container" */
 
@@ -365,7 +368,7 @@ acpi_ex_store(union acpi_operand_object *source_desc,
                                                       ACPI_IMPLICIT_CONVERSION);
                 break;
 
-        case AML_INDEX_OP:
+        case ACPI_REFCLASS_INDEX:
 
                 /* Storing to an Index (pointer into a packager or buffer) */
 
@@ -374,18 +377,18 @@ acpi_ex_store(union acpi_operand_object *source_desc,
                                                   walk_state);
                 break;
 
-        case AML_LOCAL_OP:
-        case AML_ARG_OP:
+        case ACPI_REFCLASS_LOCAL:
+        case ACPI_REFCLASS_ARG:
 
                 /* Store to a method local/arg  */
 
                 status =
-                    acpi_ds_store_object_to_local(ref_desc->reference.opcode,
-                                                  ref_desc->reference.offset,
+                    acpi_ds_store_object_to_local(ref_desc->reference.class,
+                                                  ref_desc->reference.value,
                                                   source_desc, walk_state);
                 break;
 
-        case AML_DEBUG_OP:
+        case ACPI_REFCLASS_DEBUG:
 
                 /*
                  * Storing to the Debug object causes the value stored to be
@@ -401,9 +404,9 @@ acpi_ex_store(union acpi_operand_object *source_desc,
 
         default:
 
-                ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X",
-                            ref_desc->reference.opcode));
-                ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_ERROR);
+                ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
+                            ref_desc->reference.class));
+                ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO);
 
                 status = AE_AML_INTERNAL;
                 break;
@@ -458,7 +461,7 @@ acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
 
                 if (ACPI_GET_OBJECT_TYPE(source_desc) ==
                     ACPI_TYPE_LOCAL_REFERENCE
-                    && source_desc->reference.opcode == AML_LOAD_OP) {
+                    && source_desc->reference.class == ACPI_REFCLASS_TABLE) {
 
                         /* This is a DDBHandle, just add a reference to it */
 
@@ -553,7 +556,7 @@ acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
 
                 /* Store the source value into the target buffer byte */
 
-                obj_desc->buffer.pointer[index_desc->reference.offset] = value;
+                obj_desc->buffer.pointer[index_desc->reference.value] = value;
                 break;
 
         default:
diff --git a/drivers/acpi/executer/exstoren.c b/drivers/acpi/executer/exstoren.c
index a6d2168b81f9..eef61a00803e 100644
--- a/drivers/acpi/executer/exstoren.c
+++ b/drivers/acpi/executer/exstoren.c
@@ -121,7 +121,8 @@ acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,
                     (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) &&
                     !((ACPI_GET_OBJECT_TYPE(source_desc) ==
                        ACPI_TYPE_LOCAL_REFERENCE)
-                      && (source_desc->reference.opcode == AML_LOAD_OP))) {
+                      && (source_desc->reference.class ==
+                          ACPI_REFCLASS_TABLE))) {
 
                         /* Conversion successful but still not a valid type */
 
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 2655bc1b4eeb..eaaee1660bdf 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -34,7 +34,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_FAN_COMPONENT              0x00200000
 #define ACPI_FAN_CLASS                  "fan"
 #define ACPI_FAN_FILE_STATE             "state"
 
@@ -265,7 +264,7 @@ static int acpi_fan_add(struct acpi_device *device)
 
         dev_info(&device->dev, "registered as cooling_device%d\n", cdev->id);
 
-        acpi_driver_data(device) = cdev;
+        device->driver_data = cdev;
         result = sysfs_create_link(&device->dev.kobj,
                                    &cdev->device.kobj,
                                    "thermal_cooling");
@@ -327,8 +326,8 @@ static int acpi_fan_resume(struct acpi_device *device)
 
         result = acpi_bus_get_power(device->handle, &power_state);
         if (result) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Error reading fan power state\n"));
+                printk(KERN_ERR PREFIX
+                                  "Error reading fan power state\n");
                 return result;
         }
 
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 24649ada08df..adec3d15810a 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -140,6 +140,46 @@ struct device *acpi_get_physical_device(acpi_handle handle)
 
 EXPORT_SYMBOL(acpi_get_physical_device);
 
+/* ToDo: When a PCI bridge is found, return the PCI device behind the bridge
+ *       This should work in general, but did not on a Lenovo T61 for the
+ *       graphics card. But this must be fixed when the PCI device is
+ *       bound and the kernel device struct is attached to the acpi device
+ * Note: A success call will increase reference count by one
+ *       Do call put_device(dev) on the returned device then
+ */
+struct device *acpi_get_physical_pci_device(acpi_handle handle)
+{
+        struct device *dev;
+        long long device_id;
+        acpi_status status;
+
+        status =
+                acpi_evaluate_integer(handle, "_ADR", NULL, &device_id);
+
+        if (ACPI_FAILURE(status))
+                return NULL;
+
+        /* We need to attempt to determine whether the _ADR refers to a
+           PCI device or not. There's no terribly good way to do this,
+           so the best we can hope for is to assume that there'll never
+           be a device in the host bridge */
+        if (device_id >= 0x10000) {
+                /* It looks like a PCI device. Does it exist? */
+                dev = acpi_get_physical_device(handle);
+        } else {
+                /* It doesn't look like a PCI device. Does its parent
+                   exist? */
+                acpi_handle phandle;
+                if (acpi_get_parent(handle, &phandle))
+                        return NULL;
+                dev = acpi_get_physical_device(phandle);
+        }
+        if (!dev)
+                return NULL;
+        return dev;
+}
+EXPORT_SYMBOL(acpi_get_physical_pci_device);
+
 static int acpi_bind_one(struct device *dev, acpi_handle handle)
 {
         struct acpi_device *acpi_dev;
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index dba3cfbe8cba..25dccdf179b9 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -78,19 +78,17 @@ acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
                 return_ACPI_STATUS(status);
         }
 
-        /* Set the vector */
+        /*
+         * According to the ACPI specification 2.0c and later, the 64-bit
+         * waking vector should be cleared and the 32-bit waking vector should
+         * be used, unless we want the wake-up code to be called by the BIOS in
+         * Protected Mode.  Some systems (for example HP dv5-1004nr) are known
+         * to fail to resume if the 64-bit vector is used.
+         */
+        if (facs->version >= 1)
+                facs->xfirmware_waking_vector = 0;
 
-        if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
-                /*
-                 * ACPI 1.0 FACS or short table or optional X_ field is zero
-                 */
-                facs->firmware_waking_vector = (u32) physical_address;
-        } else {
-                /*
-                 * ACPI 2.0 FACS with valid X_ field
-                 */
-                facs->xfirmware_waking_vector = physical_address;
-        }
+        facs->firmware_waking_vector = (u32)physical_address;
 
         return_ACPI_STATUS(AE_OK);
 }
@@ -134,20 +132,7 @@ acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
         }
 
         /* Get the vector */
-
-        if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
-                /*
-                 * ACPI 1.0 FACS or short table or optional X_ field is zero
-                 */
-                *physical_address =
-                    (acpi_physical_address) facs->firmware_waking_vector;
-        } else {
-                /*
-                 * ACPI 2.0 FACS with valid X_ field
-                 */
-                *physical_address =
-                    (acpi_physical_address) facs->xfirmware_waking_vector;
-        }
+        *physical_address = (acpi_physical_address)facs->firmware_waking_vector;
 
         return_ACPI_STATUS(AE_OK);
 }
@@ -627,6 +612,13 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
         }
         /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
 
+        /*
+         * Some BIOSes assume that WAK_STS will be cleared on resume and use
+         * it to determine whether the system is rebooting or resuming. Clear
+         * it for compatibility.
+         */
+        acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+
         acpi_gbl_system_awake_and_running = TRUE;
 
         /* Enable power button */
diff --git a/drivers/acpi/namespace/Makefile b/drivers/acpi/namespace/Makefile
index 3f63d3640696..371a2daf837f 100644
--- a/drivers/acpi/namespace/Makefile
+++ b/drivers/acpi/namespace/Makefile
@@ -5,7 +5,7 @@
 obj-y := nsaccess.o  nsload.o    nssearch.o  nsxfeval.o \
          nsalloc.o   nseval.o    nsnames.o   nsutils.o   nsxfname.o \
          nsdump.o    nsinit.o    nsobject.o  nswalk.o    nsxfobj.o  \
-         nsparse.o
+         nsparse.o   nspredef.o
 
 obj-$(ACPI_FUTURE_USAGE) += nsdumpdv.o
 
diff --git a/drivers/acpi/namespace/nsdump.c b/drivers/acpi/namespace/nsdump.c
index 0ab22004728a..cc0ae39440e4 100644
--- a/drivers/acpi/namespace/nsdump.c
+++ b/drivers/acpi/namespace/nsdump.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
 
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsdump")
@@ -334,9 +333,7 @@ acpi_ns_dump_one_object(acpi_handle obj_handle,
                 case ACPI_TYPE_LOCAL_REFERENCE:
 
                         acpi_os_printf("[%s]\n",
-                                       acpi_ps_get_opcode_name(obj_desc->
-                                                               reference.
-                                                               opcode));
+                                       acpi_ut_get_reference_name(obj_desc));
                         break;
 
                 case ACPI_TYPE_BUFFER_FIELD:
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c
index d369164e00b0..4cdf03ac2b46 100644
--- a/drivers/acpi/namespace/nseval.c
+++ b/drivers/acpi/namespace/nseval.c
@@ -78,6 +78,7 @@ ACPI_MODULE_NAME("nseval")
 acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
 {
         acpi_status status;
+        struct acpi_namespace_node *node;
 
         ACPI_FUNCTION_TRACE(ns_evaluate);
 
@@ -117,6 +118,8 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
                           info->resolved_node,
                           acpi_ns_get_attached_object(info->resolved_node)));
 
+        node = info->resolved_node;
+
         /*
          * Two major cases here:
          *
@@ -148,21 +151,22 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
                                 info->param_count++;
                 }
 
-                /* Error if too few arguments were passed in */
+                /*
+                 * Warning if too few or too many arguments have been passed by the
+                 * caller. We don't want to abort here with an error because an
+                 * incorrect number of arguments may not cause the method to fail.
+                 * However, the method will fail if there are too few arguments passed
+                 * and the method attempts to use one of the missing ones.
+                 */
 
                 if (info->param_count < info->obj_desc->method.param_count) {
-                        ACPI_ERROR((AE_INFO,
+                        ACPI_WARNING((AE_INFO,
                                     "Insufficient arguments - "
                                     "method [%4.4s] needs %d, found %d",
                                     acpi_ut_get_node_name(info->resolved_node),
                                     info->obj_desc->method.param_count,
                                     info->param_count));
-                        return_ACPI_STATUS(AE_MISSING_ARGUMENTS);
-                }
-
-                /* Just a warning if too many arguments */
-
-                else if (info->param_count >
+                } else if (info->param_count >
                                 info->obj_desc->method.param_count) {
                         ACPI_WARNING((AE_INFO,
                                       "Excess arguments - "
@@ -195,7 +199,28 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
         } else {
                 /*
                  * 2) Object is not a method, return its current value
+                 *
+                 * Disallow certain object types. For these, "evaluation" is undefined.
                  */
+                switch (info->resolved_node->type) {
+                case ACPI_TYPE_DEVICE:
+                case ACPI_TYPE_EVENT:
+                case ACPI_TYPE_MUTEX:
+                case ACPI_TYPE_REGION:
+                case ACPI_TYPE_THERMAL:
+                case ACPI_TYPE_LOCAL_SCOPE:
+
+                        ACPI_ERROR((AE_INFO,
+                                    "[%4.4s] Evaluation of object type [%s] is not supported",
+                                    info->resolved_node->name.ascii,
+                                    acpi_ut_get_type_name(info->resolved_node->
+                                                          type)));
+
+                        return_ACPI_STATUS(AE_TYPE);
+
+                default:
+                        break;
+                }
 
                 /*
                  * Objects require additional resolution steps (e.g., the Node may be
@@ -239,9 +264,35 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
                 }
         }
 
-        /*
-         * Check if there is a return value that must be dealt with
-         */
+        /* Validation of return values for ACPI-predefined methods and objects */
+
+        if ((status == AE_OK) || (status == AE_CTRL_RETURN_VALUE)) {
+                /*
+                 * If this is the first evaluation, check the return value. This
+                 * ensures that any warnings will only be emitted during the very
+                 * first evaluation of the object.
+                 */
+                if (!(node->flags & ANOBJ_EVALUATED)) {
+                        /*
+                         * Check for a predefined ACPI name. If found, validate the
+                         * returned object.
+                         *
+                         * Note: Ignore return status for now, emit warnings if there are
+                         * problems with the returned object. May change later to abort
+                         * the method on invalid return object.
+                         */
+                        (void)acpi_ns_check_predefined_names(node,
+                                                             info->
+                                                             return_object);
+                }
+
+                /* Mark the node as having been evaluated */
+
+                node->flags |= ANOBJ_EVALUATED;
+        }
+
+        /* Check if there is a return value that must be dealt with */
+
         if (status == AE_CTRL_RETURN_VALUE) {
 
                 /* If caller does not want the return value, delete it */
diff --git a/drivers/acpi/namespace/nsnames.c b/drivers/acpi/namespace/nsnames.c
index bd5773878009..42a39a7c96e9 100644
--- a/drivers/acpi/namespace/nsnames.c
+++ b/drivers/acpi/namespace/nsnames.c
@@ -115,7 +115,6 @@ acpi_ns_build_external_path(struct acpi_namespace_node *node,
         return (AE_OK);
 }
 
-#ifdef ACPI_DEBUG_OUTPUT
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ns_get_external_pathname
@@ -142,7 +141,7 @@ char *acpi_ns_get_external_pathname(struct acpi_namespace_node *node)
 
         size = acpi_ns_get_pathname_length(node);
         if (!size) {
-                return (NULL);
+                return_PTR(NULL);
         }
 
         /* Allocate a buffer to be returned to caller */
@@ -157,12 +156,12 @@ char *acpi_ns_get_external_pathname(struct acpi_namespace_node *node)
 
         status = acpi_ns_build_external_path(node, size, name_buffer);
         if (ACPI_FAILURE(status)) {
-                return (NULL);
+                ACPI_FREE(name_buffer);
+                return_PTR(NULL);
         }
 
         return_PTR(name_buffer);
 }
-#endif
 
 /*******************************************************************************
  *
diff --git a/drivers/acpi/namespace/nspredef.c b/drivers/acpi/namespace/nspredef.c
new file mode 100644
index 000000000000..0f17cf0898c9
--- /dev/null
+++ b/drivers/acpi/namespace/nspredef.c
@@ -0,0 +1,900 @@
+/******************************************************************************
+ *
+ * Module Name: nspredef - Validation of ACPI predefined methods and objects
+ *              $Revision: 1.1 $
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acpredef.h>
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("nspredef")
+
+/*******************************************************************************
+ *
+ * This module validates predefined ACPI objects that appear in the namespace,
+ * at the time they are evaluated (via acpi_evaluate_object). The purpose of this
+ * validation is to detect problems with BIOS-exposed predefined ACPI objects
+ * before the results are returned to the ACPI-related drivers.
+ *
+ * There are several areas that are validated:
+ *
+ *  1) The number of input arguments as defined by the method/object in the
+ *      ASL is validated against the ACPI specification.
+ *  2) The type of the return object (if any) is validated against the ACPI
+ *      specification.
+ *  3) For returned package objects, the count of package elements is
+ *      validated, as well as the type of each package element. Nested
+ *      packages are supported.
+ *
+ * For any problems found, a warning message is issued.
+ *
+ ******************************************************************************/
+/* Local prototypes */
+static acpi_status
+acpi_ns_check_package(char *pathname,
+                      union acpi_operand_object *return_object,
+                      const union acpi_predefined_info *predefined);
+
+static acpi_status
+acpi_ns_check_package_elements(char *pathname,
+                               union acpi_operand_object **elements,
+                               u8 type1, u32 count1, u8 type2, u32 count2);
+
+static acpi_status
+acpi_ns_check_object_type(char *pathname,
+                          union acpi_operand_object *return_object,
+                          u32 expected_btypes, u32 package_index);
+
+static acpi_status
+acpi_ns_check_reference(char *pathname,
+                        union acpi_operand_object *return_object);
+
+/*
+ * Names for the types that can be returned by the predefined objects.
+ * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
+ */
+static const char *acpi_rtype_names[] = {
+        "/Integer",
+        "/String",
+        "/Buffer",
+        "/Package",
+        "/Reference",
+};
+
+#define ACPI_NOT_PACKAGE    ACPI_UINT32_MAX
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_predefined_names
+ *
+ * PARAMETERS:  Node            - Namespace node for the method/object
+ *              return_object   - Object returned from the evaluation of this
+ *                                method/object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check an ACPI name for a match in the predefined name list.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
+                               union acpi_operand_object *return_object)
+{
+        acpi_status status = AE_OK;
+        const union acpi_predefined_info *predefined;
+        char *pathname;
+
+        /* Match the name for this method/object against the predefined list */
+
+        predefined = acpi_ns_check_for_predefined_name(node);
+        if (!predefined) {
+
+                /* Name was not one of the predefined names */
+
+                return (AE_OK);
+        }
+
+        /* Get the full pathname to the object, for use in error messages */
+
+        pathname = acpi_ns_get_external_pathname(node);
+        if (!pathname) {
+                pathname = ACPI_CAST_PTR(char, predefined->info.name);
+        }
+
+        /*
+         * Check that the parameter count for this method is in accordance
+         * with the ACPI specification.
+         */
+        acpi_ns_check_parameter_count(pathname, node, predefined);
+
+        /*
+         * If there is no return value, check if we require a return value for
+         * this predefined name. Either one return value is expected, or none,
+         * for both methods and other objects.
+         *
+         * Exit now if there is no return object. Warning if one was expected.
+         */
+        if (!return_object) {
+                if ((predefined->info.expected_btypes) &&
+                    (!(predefined->info.expected_btypes & ACPI_RTYPE_NONE))) {
+                        ACPI_ERROR((AE_INFO,
+                                    "%s: Missing expected return value",
+                                    pathname));
+
+                        status = AE_AML_NO_RETURN_VALUE;
+                }
+                goto exit;
+        }
+
+        /*
+         * We have a return value, but if one wasn't expected, just exit, this is
+         * not a problem
+         *
+         * For example, if "Implicit return value" is enabled, methods will
+         * always return a value
+         */
+        if (!predefined->info.expected_btypes) {
+                goto exit;
+        }
+
+        /*
+         * Check that the type of the return object is what is expected for
+         * this predefined name
+         */
+        status = acpi_ns_check_object_type(pathname, return_object,
+                                           predefined->info.expected_btypes,
+                                           ACPI_NOT_PACKAGE);
+        if (ACPI_FAILURE(status)) {
+                goto exit;
+        }
+
+        /* For returned Package objects, check the type of all sub-objects */
+
+        if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_PACKAGE) {
+                status =
+                    acpi_ns_check_package(pathname, return_object, predefined);
+        }
+
+      exit:
+        if (pathname) {
+                ACPI_FREE(pathname);
+        }
+
+        return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_parameter_count
+ *
+ * PARAMETERS:  Pathname        - Full pathname to the node (for error msgs)
+ *              Node            - Namespace node for the method/object
+ *              Predefined      - Pointer to entry in predefined name table
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Check that the declared (in ASL/AML) parameter count for a
+ *              predefined name is what is expected (i.e., what is defined in
+ *              the ACPI specification for this predefined name.)
+ *
+ ******************************************************************************/
+
+void
+acpi_ns_check_parameter_count(char *pathname,
+                              struct acpi_namespace_node *node,
+                              const union acpi_predefined_info *predefined)
+{
+        u32 param_count;
+        u32 required_params_current;
+        u32 required_params_old;
+
+        /*
+         * Check that the ASL-defined parameter count is what is expected for
+         * this predefined name.
+         *
+         * Methods have 0-7 parameters. All other types have zero.
+         */
+        param_count = 0;
+        if (node->type == ACPI_TYPE_METHOD) {
+                param_count = node->object->method.param_count;
+        }
+
+        /* Validate parameter count - allow two different legal counts (_SCP) */
+
+        required_params_current = predefined->info.param_count & 0x0F;
+        required_params_old = predefined->info.param_count >> 4;
+
+        if ((param_count != required_params_current) &&
+            (param_count != required_params_old)) {
+                ACPI_WARNING((AE_INFO,
+                              "%s: Parameter count mismatch - ASL declared %d, expected %d",
+                              pathname, param_count, required_params_current));
+        }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_for_predefined_name
+ *
+ * PARAMETERS:  Node            - Namespace node for the method/object
+ *
+ * RETURN:      Pointer to entry in predefined table. NULL indicates not found.
+ *
+ * DESCRIPTION: Check an object name against the predefined object list.
+ *
+ ******************************************************************************/
+
+const union acpi_predefined_info *acpi_ns_check_for_predefined_name(struct
+                                                                    acpi_namespace_node
+                                                                    *node)
+{
+        const union acpi_predefined_info *this_name;
+
+        /* Quick check for a predefined name, first character must be underscore */
+
+        if (node->name.ascii[0] != '_') {
+                return (NULL);
+        }
+
+        /* Search info table for a predefined method/object name */
+
+        this_name = predefined_names;
+        while (this_name->info.name[0]) {
+                if (ACPI_COMPARE_NAME(node->name.ascii, this_name->info.name)) {
+
+                        /* Return pointer to this table entry */
+
+                        return (this_name);
+                }
+
+                /*
+                 * Skip next entry in the table if this name returns a Package
+                 * (next entry contains the package info)
+                 */
+                if (this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) {
+                        this_name++;
+                }
+
+                this_name++;
+        }
+
+        return (NULL);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_package
+ *
+ * PARAMETERS:  Pathname        - Full pathname to the node (for error msgs)
+ *              return_object   - Object returned from the evaluation of a
+ *                                method or object
+ *              Predefined      - Pointer to entry in predefined name table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check a returned package object for the correct count and
+ *              correct type of all sub-objects.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_check_package(char *pathname,
+                      union acpi_operand_object *return_object,
+                      const union acpi_predefined_info *predefined)
+{
+        const union acpi_predefined_info *package;
+        union acpi_operand_object *sub_package;
+        union acpi_operand_object **elements;
+        union acpi_operand_object **sub_elements;
+        acpi_status status;
+        u32 expected_count;
+        u32 count;
+        u32 i;
+        u32 j;
+
+        ACPI_FUNCTION_NAME(ns_check_package);
+
+        /* The package info for this name is in the next table entry */
+
+        package = predefined + 1;
+
+        ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
+                          "%s Validating return Package of Type %X, Count %X\n",
+                          pathname, package->ret_info.type,
+                          return_object->package.count));
+
+        /* Extract package count and elements array */
+
+        elements = return_object->package.elements;
+        count = return_object->package.count;
+
+        /* The package must have at least one element, else invalid */
+
+        if (!count) {
+                ACPI_WARNING((AE_INFO,
+                              "%s: Return Package has no elements (empty)",
+                              pathname));
+
+                return (AE_AML_OPERAND_VALUE);
+        }
+
+        /*
+         * Decode the type of the expected package contents
+         *
+         * PTYPE1 packages contain no subpackages
+         * PTYPE2 packages contain sub-packages
+         */
+        switch (package->ret_info.type) {
+        case ACPI_PTYPE1_FIXED:
+
+                /*
+                 * The package count is fixed and there are no sub-packages
+                 *
+                 * If package is too small, exit.
+                 * If package is larger than expected, issue warning but continue
+                 */
+                expected_count =
+                    package->ret_info.count1 + package->ret_info.count2;
+                if (count < expected_count) {
+                        goto package_too_small;
+                } else if (count > expected_count) {
+                        ACPI_WARNING((AE_INFO,
+                                      "%s: Return Package is larger than needed - "
+                                      "found %u, expected %u", pathname, count,
+                                      expected_count));
+                }
+
+                /* Validate all elements of the returned package */
+
+                status = acpi_ns_check_package_elements(pathname, elements,
+                                                        package->ret_info.
+                                                        object_type1,
+                                                        package->ret_info.
+                                                        count1,
+                                                        package->ret_info.
+                                                        object_type2,
+                                                        package->ret_info.
+                                                        count2);
+                if (ACPI_FAILURE(status)) {
+                        return (status);
+                }
+                break;
+
+        case ACPI_PTYPE1_VAR:
+
+                /*
+                 * The package count is variable, there are no sub-packages, and all
+                 * elements must be of the same type
+                 */
+                for (i = 0; i < count; i++) {
+                        status = acpi_ns_check_object_type(pathname, *elements,
+                                                           package->ret_info.
+                                                           object_type1, i);
+                        if (ACPI_FAILURE(status)) {
+                                return (status);
+                        }
+                        elements++;
+                }
+                break;
+
+        case ACPI_PTYPE1_OPTION:
+
+                /*
+                 * The package count is variable, there are no sub-packages. There are
+                 * a fixed number of required elements, and a variable number of
+                 * optional elements.
+                 *
+                 * Check if package is at least as large as the minimum required
+                 */
+                expected_count = package->ret_info3.count;
+                if (count < expected_count) {
+                        goto package_too_small;
+                }
+
+                /* Variable number of sub-objects */
+
+                for (i = 0; i < count; i++) {
+                        if (i < package->ret_info3.count) {
+
+                                /* These are the required package elements (0, 1, or 2) */
+
+                                status =
+                                    acpi_ns_check_object_type(pathname,
+                                                              *elements,
+                                                              package->
+                                                              ret_info3.
+                                                              object_type[i],
+                                                              i);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+                        } else {
+                                /* These are the optional package elements */
+
+                                status =
+                                    acpi_ns_check_object_type(pathname,
+                                                              *elements,
+                                                              package->
+                                                              ret_info3.
+                                                              tail_object_type,
+                                                              i);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+                        }
+                        elements++;
+                }
+                break;
+
+        case ACPI_PTYPE2_PKG_COUNT:
+
+                /* First element is the (Integer) count of sub-packages to follow */
+
+                status = acpi_ns_check_object_type(pathname, *elements,
+                                                   ACPI_RTYPE_INTEGER, 0);
+                if (ACPI_FAILURE(status)) {
+                        return (status);
+                }
+
+                /*
+                 * Count cannot be larger than the parent package length, but allow it
+                 * to be smaller. The >= accounts for the Integer above.
+                 */
+                expected_count = (u32) (*elements)->integer.value;
+                if (expected_count >= count) {
+                        goto package_too_small;
+                }
+
+                count = expected_count;
+                elements++;
+
+                /* Now we can walk the sub-packages */
+
+                /*lint -fallthrough */
+
+        case ACPI_PTYPE2:
+        case ACPI_PTYPE2_FIXED:
+        case ACPI_PTYPE2_MIN:
+        case ACPI_PTYPE2_COUNT:
+
+                /*
+                 * These types all return a single package that consists of a variable
+                 * number of sub-packages
+                 */
+                for (i = 0; i < count; i++) {
+                        sub_package = *elements;
+                        sub_elements = sub_package->package.elements;
+
+                        /* Each sub-object must be of type Package */
+
+                        status =
+                            acpi_ns_check_object_type(pathname, sub_package,
+                                                      ACPI_RTYPE_PACKAGE, i);
+                        if (ACPI_FAILURE(status)) {
+                                return (status);
+                        }
+
+                        /* Examine the different types of sub-packages */
+
+                        switch (package->ret_info.type) {
+                        case ACPI_PTYPE2:
+                        case ACPI_PTYPE2_PKG_COUNT:
+
+                                /* Each subpackage has a fixed number of elements */
+
+                                expected_count =
+                                    package->ret_info.count1 +
+                                    package->ret_info.count2;
+                                if (sub_package->package.count !=
+                                    expected_count) {
+                                        count = sub_package->package.count;
+                                        goto package_too_small;
+                                }
+
+                                status =
+                                    acpi_ns_check_package_elements(pathname,
+                                                                   sub_elements,
+                                                                   package->
+                                                                   ret_info.
+                                                                   object_type1,
+                                                                   package->
+                                                                   ret_info.
+                                                                   count1,
+                                                                   package->
+                                                                   ret_info.
+                                                                   object_type2,
+                                                                   package->
+                                                                   ret_info.
+                                                                   count2);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+                                break;
+
+                        case ACPI_PTYPE2_FIXED:
+
+                                /* Each sub-package has a fixed length */
+
+                                expected_count = package->ret_info2.count;
+                                if (sub_package->package.count < expected_count) {
+                                        count = sub_package->package.count;
+                                        goto package_too_small;
+                                }
+
+                                /* Check the type of each sub-package element */
+
+                                for (j = 0; j < expected_count; j++) {
+                                        status =
+                                            acpi_ns_check_object_type(pathname,
+                                                                      sub_elements
+                                                                      [j],
+                                                                      package->
+                                                                      ret_info2.
+                                                                      object_type
+                                                                      [j], j);
+                                        if (ACPI_FAILURE(status)) {
+                                                return (status);
+                                        }
+                                }
+                                break;
+
+                        case ACPI_PTYPE2_MIN:
+
+                                /* Each sub-package has a variable but minimum length */
+
+                                expected_count = package->ret_info.count1;
+                                if (sub_package->package.count < expected_count) {
+                                        count = sub_package->package.count;
+                                        goto package_too_small;
+                                }
+
+                                /* Check the type of each sub-package element */
+
+                                status =
+                                    acpi_ns_check_package_elements(pathname,
+                                                                   sub_elements,
+                                                                   package->
+                                                                   ret_info.
+                                                                   object_type1,
+                                                                   sub_package->
+                                                                   package.
+                                                                   count, 0, 0);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+                                break;
+
+                        case ACPI_PTYPE2_COUNT:
+
+                                /* First element is the (Integer) count of elements to follow */
+
+                                status =
+                                    acpi_ns_check_object_type(pathname,
+                                                              *sub_elements,
+                                                              ACPI_RTYPE_INTEGER,
+                                                              0);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+
+                                /* Make sure package is large enough for the Count */
+
+                                expected_count =
+                                    (u32) (*sub_elements)->integer.value;
+                                if (sub_package->package.count < expected_count) {
+                                        count = sub_package->package.count;
+                                        goto package_too_small;
+                                }
+
+                                /* Check the type of each sub-package element */
+
+                                status =
+                                    acpi_ns_check_package_elements(pathname,
+                                                                   (sub_elements
+                                                                    + 1),
+                                                                   package->
+                                                                   ret_info.
+                                                                   object_type1,
+                                                                   (expected_count
+                                                                    - 1), 0, 0);
+                                if (ACPI_FAILURE(status)) {
+                                        return (status);
+                                }
+                                break;
+
+                        default:
+                                break;
+                        }
+
+                        elements++;
+                }
+                break;
+
+        default:
+
+                /* Should not get here if predefined info table is correct */
+
+                ACPI_WARNING((AE_INFO,
+                              "%s: Invalid internal return type in table entry: %X",
+                              pathname, package->ret_info.type));
+
+                return (AE_AML_INTERNAL);
+        }
+
+        return (AE_OK);
+
+      package_too_small:
+
+        /* Error exit for the case with an incorrect package count */
+
+        ACPI_WARNING((AE_INFO, "%s: Return Package is too small - "
+                      "found %u, expected %u", pathname, count,
+                      expected_count));
+
+        return (AE_AML_OPERAND_VALUE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_package_elements
+ *
+ * PARAMETERS:  Pathname        - Full pathname to the node (for error msgs)
+ *              Elements        - Pointer to the package elements array
+ *              Type1           - Object type for first group
+ *              Count1          - Count for first group
+ *              Type2           - Object type for second group
+ *              Count2          - Count for second group
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check that all elements of a package are of the correct object
+ *              type. Supports up to two groups of different object types.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_check_package_elements(char *pathname,
+                               union acpi_operand_object **elements,
+                               u8 type1, u32 count1, u8 type2, u32 count2)
+{
+        union acpi_operand_object **this_element = elements;
+        acpi_status status;
+        u32 i;
+
+        /*
+         * Up to two groups of package elements are supported by the data
+         * structure. All elements in each group must be of the same type.
+         * The second group can have a count of zero.
+         */
+        for (i = 0; i < count1; i++) {
+                status = acpi_ns_check_object_type(pathname, *this_element,
+                                                   type1, i);
+                if (ACPI_FAILURE(status)) {
+                        return (status);
+                }
+                this_element++;
+        }
+
+        for (i = 0; i < count2; i++) {
+                status = acpi_ns_check_object_type(pathname, *this_element,
+                                                   type2, (i + count1));
+                if (ACPI_FAILURE(status)) {
+                        return (status);
+                }
+                this_element++;
+        }
+
+        return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_object_type
+ *
+ * PARAMETERS:  Pathname        - Full pathname to the node (for error msgs)
+ *              return_object   - Object return from the execution of this
+ *                                method/object
+ *              expected_btypes - Bitmap of expected return type(s)
+ *              package_index   - Index of object within parent package (if
+ *                                applicable - ACPI_NOT_PACKAGE otherwise)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check the type of the return object against the expected object
+ *              type(s). Use of Btype allows multiple expected object types.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_check_object_type(char *pathname,
+                          union acpi_operand_object *return_object,
+                          u32 expected_btypes, u32 package_index)
+{
+        acpi_status status = AE_OK;
+        u32 return_btype;
+        char type_buffer[48];   /* Room for 5 types */
+        u32 this_rtype;
+        u32 i;
+        u32 j;
+
+        /*
+         * If we get a NULL return_object here, it is a NULL package element,
+         * and this is always an error.
+         */
+        if (!return_object) {
+                goto type_error_exit;
+        }
+
+        /* A Namespace node should not get here, but make sure */
+
+        if (ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
+                ACPI_WARNING((AE_INFO,
+                              "%s: Invalid return type - Found a Namespace node [%4.4s] type %s",
+                              pathname, return_object->node.name.ascii,
+                              acpi_ut_get_type_name(return_object->node.type)));
+                return (AE_AML_OPERAND_TYPE);
+        }
+
+        /*
+         * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
+         * The bitmapped type allows multiple possible return types.
+         *
+         * Note, the cases below must handle all of the possible types returned
+         * from all of the predefined names (including elements of returned
+         * packages)
+         */
+        switch (ACPI_GET_OBJECT_TYPE(return_object)) {
+        case ACPI_TYPE_INTEGER:
+                return_btype = ACPI_RTYPE_INTEGER;
+                break;
+
+        case ACPI_TYPE_BUFFER:
+                return_btype = ACPI_RTYPE_BUFFER;
+                break;
+
+        case ACPI_TYPE_STRING:
+                return_btype = ACPI_RTYPE_STRING;
+                break;
+
+        case ACPI_TYPE_PACKAGE:
+                return_btype = ACPI_RTYPE_PACKAGE;
+                break;
+
+        case ACPI_TYPE_LOCAL_REFERENCE:
+                return_btype = ACPI_RTYPE_REFERENCE;
+                break;
+
+        default:
+                /* Not one of the supported objects, must be incorrect */
+
+                goto type_error_exit;
+        }
+
+        /* Is the object one of the expected types? */
+
+        if (!(return_btype & expected_btypes)) {
+                goto type_error_exit;
+        }
+
+        /* For reference objects, check that the reference type is correct */
+
+        if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_LOCAL_REFERENCE) {
+                status = acpi_ns_check_reference(pathname, return_object);
+        }
+
+        return (status);
+
+      type_error_exit:
+
+        /* Create a string with all expected types for this predefined object */
+
+        j = 1;
+        type_buffer[0] = 0;
+        this_rtype = ACPI_RTYPE_INTEGER;
+
+        for (i = 0; i < ACPI_NUM_RTYPES; i++) {
+
+                /* If one of the expected types, concatenate the name of this type */
+
+                if (expected_btypes & this_rtype) {
+                        ACPI_STRCAT(type_buffer, &acpi_rtype_names[i][j]);
+                        j = 0;  /* Use name separator from now on */
+                }
+                this_rtype <<= 1;       /* Next Rtype */
+        }
+
+        if (package_index == ACPI_NOT_PACKAGE) {
+                ACPI_WARNING((AE_INFO,
+                              "%s: Return type mismatch - found %s, expected %s",
+                              pathname,
+                              acpi_ut_get_object_type_name(return_object),
+                              type_buffer));
+        } else {
+                ACPI_WARNING((AE_INFO,
+                              "%s: Return Package type mismatch at index %u - "
+                              "found %s, expected %s", pathname, package_index,
+                              acpi_ut_get_object_type_name(return_object),
+                              type_buffer));
+        }
+
+        return (AE_AML_OPERAND_TYPE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_check_reference
+ *
+ * PARAMETERS:  Pathname        - Full pathname to the node (for error msgs)
+ *              return_object   - Object returned from the evaluation of a
+ *                                method or object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check a returned reference object for the correct reference
+ *              type. The only reference type that can be returned from a
+ *              predefined method is a named reference. All others are invalid.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_check_reference(char *pathname,
+                        union acpi_operand_object *return_object)
+{
+
+        /*
+         * Check the reference object for the correct reference type (opcode).
+         * The only type of reference that can be converted to an union acpi_object is
+         * a reference to a named object (reference class: NAME)
+         */
+        if (return_object->reference.class == ACPI_REFCLASS_NAME) {
+                return (AE_OK);
+        }
+
+        ACPI_WARNING((AE_INFO,
+                      "%s: Return type mismatch - unexpected reference object type [%s] %2.2X",
+                      pathname, acpi_ut_get_reference_name(return_object),
+                      return_object->reference.class));
+
+        return (AE_AML_OPERAND_TYPE);
+}
diff --git a/drivers/acpi/namespace/nssearch.c b/drivers/acpi/namespace/nssearch.c
index 8399276cba1e..a9a80bf811b3 100644
--- a/drivers/acpi/namespace/nssearch.c
+++ b/drivers/acpi/namespace/nssearch.c
@@ -331,7 +331,7 @@ acpi_ns_search_and_enter(u32 target_name,
                                       "Found bad character(s) in name, repaired: [%4.4s]\n",
                                       ACPI_CAST_PTR(char, &target_name)));
                 } else {
-                        ACPI_DEBUG_PRINT((ACPI_DB_WARN,
+                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                           "Found bad character(s) in name, repaired: [%4.4s]\n",
                                           ACPI_CAST_PTR(char, &target_name)));
                 }
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index 38be5865d95d..a085cc39c055 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -48,6 +48,10 @@
 
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsxfeval")
+
+/* Local prototypes */
+static void acpi_ns_resolve_references(struct acpi_evaluate_info *info);
+
 #ifdef ACPI_FUTURE_USAGE
 /*******************************************************************************
  *
@@ -69,6 +73,7 @@ ACPI_MODULE_NAME("nsxfeval")
  *              be valid (non-null)
  *
  ******************************************************************************/
+
 acpi_status
 acpi_evaluate_object_typed(acpi_handle handle,
                            acpi_string pathname,
@@ -283,6 +288,10 @@ acpi_evaluate_object(acpi_handle handle,
 
                         if (ACPI_SUCCESS(status)) {
 
+                                /* Dereference Index and ref_of references */
+
+                                acpi_ns_resolve_references(info);
+
                                 /* Get the size of the returned object */
 
                                 status =
@@ -352,6 +361,74 @@ ACPI_EXPORT_SYMBOL(acpi_evaluate_object)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ns_resolve_references
+ *
+ * PARAMETERS:  Info                    - Evaluation info block
+ *
+ * RETURN:      Info->return_object is replaced with the dereferenced object
+ *
+ * DESCRIPTION: Dereference certain reference objects. Called before an
+ *              internal return object is converted to an external union acpi_object.
+ *
+ * Performs an automatic dereference of Index and ref_of reference objects.
+ * These reference objects are not supported by the union acpi_object, so this is a
+ * last resort effort to return something useful. Also, provides compatibility
+ * with other ACPI implementations.
+ *
+ * NOTE: does not handle references within returned package objects or nested
+ * references, but this support could be added later if found to be necessary.
+ *
+ ******************************************************************************/
+static void acpi_ns_resolve_references(struct acpi_evaluate_info *info)
+{
+        union acpi_operand_object *obj_desc = NULL;
+        struct acpi_namespace_node *node;
+
+        /* We are interested in reference objects only */
+
+        if (ACPI_GET_OBJECT_TYPE(info->return_object) !=
+            ACPI_TYPE_LOCAL_REFERENCE) {
+                return;
+        }
+
+        /*
+         * Two types of references are supported - those created by Index and
+         * ref_of operators. A name reference (AML_NAMEPATH_OP) can be converted
+         * to an union acpi_object, so it is not dereferenced here. A ddb_handle
+         * (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to
+         * an union acpi_object.
+         */
+        switch (info->return_object->reference.class) {
+        case ACPI_REFCLASS_INDEX:
+
+                obj_desc = *(info->return_object->reference.where);
+                break;
+
+        case ACPI_REFCLASS_REFOF:
+
+                node = info->return_object->reference.object;
+                if (node) {
+                        obj_desc = node->object;
+                }
+                break;
+
+        default:
+                return;
+        }
+
+        /* Replace the existing reference object */
+
+        if (obj_desc) {
+                acpi_ut_add_reference(obj_desc);
+                acpi_ut_remove_reference(info->return_object);
+                info->return_object = obj_desc;
+        }
+
+        return;
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_walk_namespace
  *
  * PARAMETERS:  Type                - acpi_object_type to search for
@@ -379,6 +456,7 @@ ACPI_EXPORT_SYMBOL(acpi_evaluate_object)
  *              function, etc.
  *
  ******************************************************************************/
+
 acpi_status
 acpi_walk_namespace(acpi_object_type type,
                     acpi_handle start_object,
diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c
index a287ed550f54..5efa4e7ddb0b 100644
--- a/drivers/acpi/namespace/nsxfname.c
+++ b/drivers/acpi/namespace/nsxfname.c
@@ -253,6 +253,7 @@ acpi_get_object_info(acpi_handle handle, struct acpi_buffer * buffer)
         node = acpi_ns_map_handle_to_node(handle);
         if (!node) {
                 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+                status = AE_BAD_PARAMETER;
                 goto cleanup;
         }
 
@@ -264,6 +265,10 @@ acpi_get_object_info(acpi_handle handle, struct acpi_buffer * buffer)
         info->name = node->name.integer;
         info->valid = 0;
 
+        if (node->type == ACPI_TYPE_METHOD) {
+                info->param_count = node->object->method.param_count;
+        }
+
         status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
         if (ACPI_FAILURE(status)) {
                 goto cleanup;
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index cb9864e39bae..25ceae9191ef 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -258,7 +258,7 @@ int __init acpi_numa_init(void)
 
 int acpi_get_pxm(acpi_handle h)
 {
-        unsigned long pxm;
+        unsigned long long pxm;
         acpi_status status;
         acpi_handle handle;
         acpi_handle phandle = h;
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 235a1386888a..c8111424dcb8 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -35,7 +35,6 @@
 #include <linux/interrupt.h>
 #include <linux/kmod.h>
 #include <linux/delay.h>
-#include <linux/dmi.h>
 #include <linux/workqueue.h>
 #include <linux/nmi.h>
 #include <linux/acpi.h>
@@ -97,54 +96,44 @@ static DEFINE_SPINLOCK(acpi_res_lock);
 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
 
 /*
- * "Ode to _OSI(Linux)"
+ * The story of _OSI(Linux)
  *
- * osi_linux -- Control response to BIOS _OSI(Linux) query.
+ * From pre-history through Linux-2.6.22,
+ * Linux responded TRUE upon a BIOS OSI(Linux) query.
  *
- * As Linux evolves, the features that it supports change.
- * So an OSI string such as "Linux" is not specific enough
- * to be useful across multiple versions of Linux.  It
- * doesn't identify any particular feature, interface,
- * or even any particular version of Linux...
+ * Unfortunately, reference BIOS writers got wind of this
+ * and put OSI(Linux) in their example code, quickly exposing
+ * this string as ill-conceived and opening the door to
+ * an un-bounded number of BIOS incompatibilities.
  *
- * Unfortunately, Linux-2.6.22 and earlier responded "yes"
- * to a BIOS _OSI(Linux) query.  When
- * a reference mobile BIOS started using it, its use
- * started to spread to many vendor platforms.
- * As it is not supportable, we need to halt that spread.
+ * For example, OSI(Linux) was used on resume to re-POST a
+ * video card on one system, because Linux at that time
+ * could not do a speedy restore in its native driver.
+ * But then upon gaining quick native restore capability,
+ * Linux has no way to tell the BIOS to skip the time-consuming
+ * POST -- putting Linux at a permanent performance disadvantage.
+ * On another system, the BIOS writer used OSI(Linux)
+ * to infer native OS support for IPMI!  On other systems,
+ * OSI(Linux) simply got in the way of Linux claiming to
+ * be compatible with other operating systems, exposing
+ * BIOS issues such as skipped device initialization.
  *
- * Today, most BIOS references to _OSI(Linux) are noise --
- * they have no functional effect and are just dead code
- * carried over from the reference BIOS.
- *
- * The next most common case is that _OSI(Linux) harms Linux,
- * usually by causing the BIOS to follow paths that are
- * not tested during Windows validation.
- *
- * Finally, there is a short list of platforms
- * where OSI(Linux) benefits Linux.
- *
- * In Linux-2.6.23, OSI(Linux) is first disabled by default.
- * DMI is used to disable the dmesg warning about OSI(Linux)
- * on platforms where it is known to have no effect.
- * But a dmesg warning remains for systems where
- * we do not know if OSI(Linux) is good or bad for the system.
- * DMI is also used to enable OSI(Linux) for the machines
- * that are known to need it.
+ * So "Linux" turned out to be a really poor chose of
+ * OSI string, and from Linux-2.6.23 onward we respond FALSE.
  *
  * BIOS writers should NOT query _OSI(Linux) on future systems.
- * It will be ignored by default, and to get Linux to
- * not ignore it will require a kernel source update to
- * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
+ * Linux will complain on the console when it sees it, and return FALSE.
+ * To get Linux to return TRUE for your system  will require
+ * a kernel source update to add a DMI entry,
+ * or boot with "acpi_osi=Linux"
  */
-#define OSI_LINUX_ENABLE 0
 
 static struct osi_linux {
         unsigned int    enable:1;
         unsigned int    dmi:1;
         unsigned int    cmdline:1;
         unsigned int    known:1;
-} osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0};
+} osi_linux = { 0, 0, 0, 0};
 
 static void __init acpi_request_region (struct acpi_generic_address *addr,
         unsigned int length, char *desc)
@@ -608,7 +597,7 @@ static void acpi_os_derive_pci_id_2(acpi_handle rhandle,	/* upper bound  */
         acpi_handle handle;
         struct acpi_pci_id *pci_id = *id;
         acpi_status status;
-        unsigned long temp;
+        unsigned long long temp;
         acpi_object_type type;
 
         acpi_get_parent(chandle, &handle);
@@ -620,8 +609,7 @@ static void acpi_os_derive_pci_id_2(acpi_handle rhandle,	/* upper bound  */
                 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
                         return;
 
-                status =
-                    acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
+                status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
                                           &temp);
                 if (ACPI_SUCCESS(status)) {
                         u32 val;
@@ -682,6 +670,22 @@ static void acpi_os_execute_deferred(struct work_struct *work)
         return;
 }
 
+static void acpi_os_execute_hp_deferred(struct work_struct *work)
+{
+        struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
+        if (!dpc) {
+                printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
+                return;
+        }
+
+        acpi_os_wait_events_complete(NULL);
+
+        dpc->function(dpc->context);
+        kfree(dpc);
+
+        return;
+}
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_os_execute
@@ -697,12 +701,13 @@ static void acpi_os_execute_deferred(struct work_struct *work)
  *
  ******************************************************************************/
 
-acpi_status acpi_os_execute(acpi_execute_type type,
-                            acpi_osd_exec_callback function, void *context)
+static acpi_status __acpi_os_execute(acpi_execute_type type,
+        acpi_osd_exec_callback function, void *context, int hp)
 {
         acpi_status status = AE_OK;
         struct acpi_os_dpc *dpc;
         struct workqueue_struct *queue;
+        int ret;
         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                           "Scheduling function [%p(%p)] for deferred execution.\n",
                           function, context));
@@ -726,19 +731,38 @@ acpi_status acpi_os_execute(acpi_execute_type type,
         dpc->function = function;
         dpc->context = context;
 
-        INIT_WORK(&dpc->work, acpi_os_execute_deferred);
-        queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
-        if (!queue_work(queue, &dpc->work)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                          "Call to queue_work() failed.\n"));
+        if (!hp) {
+                INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+                queue = (type == OSL_NOTIFY_HANDLER) ?
+                        kacpi_notify_wq : kacpid_wq;
+                ret = queue_work(queue, &dpc->work);
+        } else {
+                INIT_WORK(&dpc->work, acpi_os_execute_hp_deferred);
+                ret = schedule_work(&dpc->work);
+        }
+
+        if (!ret) {
+                printk(KERN_ERR PREFIX
+                          "Call to queue_work() failed.\n");
                 status = AE_ERROR;
                 kfree(dpc);
         }
         return_ACPI_STATUS(status);
 }
 
+acpi_status acpi_os_execute(acpi_execute_type type,
+                            acpi_osd_exec_callback function, void *context)
+{
+        return __acpi_os_execute(type, function, context, 0);
+}
 EXPORT_SYMBOL(acpi_os_execute);
 
+acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
+        void *context)
+{
+        return __acpi_os_execute(0, function, context, 1);
+}
+
 void acpi_os_wait_events_complete(void *context)
 {
         flush_workqueue(kacpid_wq);
@@ -1261,34 +1285,6 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
         return (AE_OK);
 }
 
-/**
- *      acpi_dmi_dump - dump DMI slots needed for blacklist entry
- *
- *      Returns 0 on success
- */
-static int acpi_dmi_dump(void)
-{
-
-        if (!dmi_available)
-                return -1;
-
-        printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
-                dmi_get_system_info(DMI_SYS_VENDOR));
-        printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
-                dmi_get_system_info(DMI_PRODUCT_NAME));
-        printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
-                dmi_get_system_info(DMI_PRODUCT_VERSION));
-        printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
-                dmi_get_system_info(DMI_BOARD_NAME));
-        printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
-                dmi_get_system_info(DMI_BIOS_VENDOR));
-        printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
-                dmi_get_system_info(DMI_BIOS_DATE));
-
-        return 0;
-}
-
-
 /******************************************************************************
  *
  * FUNCTION:    acpi_os_validate_interface
@@ -1315,21 +1311,6 @@ acpi_os_validate_interface (char *interface)
                         osi_linux.cmdline ? " via cmdline" :
                         osi_linux.dmi ? " via DMI" : "");
 
-                if (!osi_linux.dmi) {
-                        if (acpi_dmi_dump())
-                                printk(KERN_NOTICE PREFIX
-                                        "[please extract dmidecode output]\n");
-                        printk(KERN_NOTICE PREFIX
-                                "Please send DMI info above to "
-                                "linux-acpi@vger.kernel.org\n");
-                }
-                if (!osi_linux.known && !osi_linux.cmdline) {
-                        printk(KERN_NOTICE PREFIX
-                                "If \"acpi_osi=%sLinux\" works better, "
-                                "please notify linux-acpi@vger.kernel.org\n",
-                                osi_linux.enable ? "!" : "");
-                }
-
                 if (osi_linux.enable)
                         return AE_OK;
         }
diff --git a/drivers/acpi/parser/psloop.c b/drivers/acpi/parser/psloop.c
index c06238e55d98..4647039a0d8a 100644
--- a/drivers/acpi/parser/psloop.c
+++ b/drivers/acpi/parser/psloop.c
@@ -719,6 +719,8 @@ acpi_ps_complete_op(struct acpi_walk_state *walk_state,
                 *op = NULL;
         }
 
+        ACPI_PREEMPTION_POINT();
+
         return_ACPI_STATUS(AE_OK);
 }
 
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
index 15e1702e48d6..68e932f215ea 100644
--- a/drivers/acpi/parser/psparse.c
+++ b/drivers/acpi/parser/psparse.c
@@ -137,6 +137,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
         union acpi_parse_object *next;
         const struct acpi_opcode_info *parent_info;
         union acpi_parse_object *replacement_op = NULL;
+        acpi_status status = AE_OK;
 
         ACPI_FUNCTION_TRACE_PTR(ps_complete_this_op, op);
 
@@ -186,7 +187,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
                         replacement_op =
                             acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
                         if (!replacement_op) {
-                                goto allocate_error;
+                                status = AE_NO_MEMORY;
                         }
                         break;
 
@@ -211,7 +212,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
                                 replacement_op =
                                     acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
                                 if (!replacement_op) {
-                                        goto allocate_error;
+                                        status = AE_NO_MEMORY;
                                 }
                         } else
                             if ((op->common.parent->common.aml_opcode ==
@@ -226,13 +227,13 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
                                             acpi_ps_alloc_op(op->common.
                                                              aml_opcode);
                                         if (!replacement_op) {
-                                                goto allocate_error;
+                                                status = AE_NO_MEMORY;
+                                        } else {
+                                                replacement_op->named.data =
+                                                    op->named.data;
+                                                replacement_op->named.length =
+                                                    op->named.length;
                                         }
-
-                                        replacement_op->named.data =
-                                            op->named.data;
-                                        replacement_op->named.length =
-                                            op->named.length;
                                 }
                         }
                         break;
@@ -242,7 +243,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
                         replacement_op =
                             acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
                         if (!replacement_op) {
-                                goto allocate_error;
+                                status = AE_NO_MEMORY;
                         }
                 }
 
@@ -302,14 +303,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
         /* Now we can actually delete the subtree rooted at Op */
 
         acpi_ps_delete_parse_tree(op);
-        return_ACPI_STATUS(AE_OK);
-
-      allocate_error:
-
-        /* Always delete the subtree, even on error */
-
-        acpi_ps_delete_parse_tree(op);
-        return_ACPI_STATUS(AE_NO_MEMORY);
+        return_ACPI_STATUS(status);
 }
 
 /*******************************************************************************
@@ -641,10 +635,12 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
                                             ACPI_WALK_METHOD_RESTART;
                                 }
                         } else {
-                                /* On error, delete any return object */
+                                /* On error, delete any return object or implicit return */
 
                                 acpi_ut_remove_reference(previous_walk_state->
                                                          return_desc);
+                                acpi_ds_clear_implicit_return
+                                    (previous_walk_state);
                         }
                 }
 
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 11acaee14d66..bf79d83bdfbb 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -384,6 +384,27 @@ acpi_pci_free_irq(struct acpi_prt_entry *entry,
         return irq;
 }
 
+#ifdef CONFIG_X86_IO_APIC
+extern int noioapicquirk;
+
+static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
+{
+        struct pci_bus *bus_it;
+
+        for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
+                if (!bus_it->self)
+                        return 0;
+
+                printk(KERN_INFO "vendor=%04x device=%04x\n", bus_it->self->vendor,
+                                bus_it->self->device);
+
+                if (bus_it->self->irq_reroute_variant)
+                        return bus_it->self->irq_reroute_variant;
+        }
+        return 0;
+}
+#endif /* CONFIG_X86_IO_APIC */
+
 /*
  * acpi_pci_irq_lookup
  * success: return IRQ >= 0
@@ -413,6 +434,41 @@ acpi_pci_irq_lookup(struct pci_bus *bus,
         }
 
         ret = func(entry, triggering, polarity, link);
+
+#ifdef CONFIG_X86_IO_APIC
+        /*
+         * Some chipsets (e.g. intel 6700PXH) generate a legacy INTx when the
+         * IRQ entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel
+         * does during interrupt handling). When this INTx generation cannot be
+         * disabled, we reroute these interrupts to their legacy equivalent to
+         * get rid of spurious interrupts.
+         */
+        if (!noioapicquirk) {
+                switch (bridge_has_boot_interrupt_variant(bus)) {
+                case 0:
+                        /* no rerouting necessary */
+                        break;
+
+                case INTEL_IRQ_REROUTE_VARIANT:
+                        /*
+                         * Remap according to INTx routing table in 6700PXH
+                         * specs, intel order number 302628-002, section
+                         * 2.15.2. Other chipsets (80332, ...) have the same
+                         * mapping and are handled here as well.
+                         */
+                        printk(KERN_INFO "pci irq %d -> rerouted to legacy "
+                                         "irq %d\n", ret, (ret % 4) + 16);
+                        ret = (ret % 4) + 16;
+                        break;
+
+                default:
+                        printk(KERN_INFO "not rerouting irq %d to legacy irq: "
+                                         "unknown mapping\n", ret);
+                        break;
+                }
+        }
+#endif /* CONFIG_X86_IO_APIC */
+
         return ret;
 }
 
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index cf47805a7448..e52ad91ce2dc 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -531,7 +531,7 @@ int __init acpi_irq_penalty_init(void)
         return 0;
 }
 
-static int acpi_irq_balance;    /* 0: static, 1: balance */
+static int acpi_irq_balance = -1;       /* 0: static, 1: balance */
 
 static int acpi_pci_link_allocate(struct acpi_pci_link *link)
 {
@@ -709,7 +709,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
                           acpi_device_bid(link->device)));
 
         if (link->refcnt == 0) {
-                acpi_ut_evaluate_object(link->device->handle, "_DIS", 0, NULL);
+                acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL);
         }
         mutex_unlock(&acpi_link_lock);
         return (link->irq.active);
@@ -737,7 +737,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
         link->device = device;
         strcpy(acpi_device_name(device), ACPI_PCI_LINK_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_PCI_LINK_CLASS);
-        acpi_driver_data(device) = link;
+        device->driver_data = link;
 
         mutex_lock(&acpi_link_lock);
         result = acpi_pci_link_get_possible(link);
@@ -773,7 +773,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
 
       end:
         /* disable all links -- to be activated on use */
-        acpi_ut_evaluate_object(device->handle, "_DIS", 0, NULL);
+        acpi_evaluate_object(device->handle, "_DIS", NULL, NULL);
         mutex_unlock(&acpi_link_lock);
 
         if (result)
@@ -950,10 +950,17 @@ device_initcall(irqrouter_init_sysfs);
 
 static int __init acpi_pci_link_init(void)
 {
-
         if (acpi_noirq)
                 return 0;
 
+        if (acpi_irq_balance == -1) {
+                /* no command line switch: enable balancing in IOAPIC mode */
+                if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
+                        acpi_irq_balance = 1;
+                else
+                        acpi_irq_balance = 0;
+        }
+
         acpi_link.count = 0;
         INIT_LIST_HEAD(&acpi_link.entries);
 
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index c3fed31166b5..642554b1b60c 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -190,7 +190,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
         struct acpi_pci_root *root = NULL;
         struct acpi_pci_root *tmp;
         acpi_status status = AE_OK;
-        unsigned long value = 0;
+        unsigned long long value = 0;
         acpi_handle handle = NULL;
         struct acpi_device *child;
 
@@ -206,7 +206,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
         root->device = device;
         strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
-        acpi_driver_data(device) = root;
+        device->driver_data = root;
 
         device->ops.bind = acpi_pci_bind;
 
@@ -376,15 +376,9 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 
 static int __init acpi_pci_root_init(void)
 {
-
         if (acpi_pci_disabled)
                 return 0;
 
-        /* DEBUG:
-           acpi_dbg_layer = ACPI_PCI_COMPONENT;
-           acpi_dbg_level = 0xFFFFFFFF;
-         */
-
         if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
                 return -ENODEV;
 
diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c
index d5b4ef898879..cd1f4467be7b 100644
--- a/drivers/acpi/pci_slot.c
+++ b/drivers/acpi/pci_slot.c
@@ -76,10 +76,10 @@ static struct acpi_pci_driver acpi_pci_slot_driver = {
 };
 
 static int
-check_slot(acpi_handle handle, unsigned long *sun)
+check_slot(acpi_handle handle, unsigned long long *sun)
 {
         int device = -1;
-        unsigned long adr, sta;
+        unsigned long long adr, sta;
         acpi_status status;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 
@@ -132,7 +132,7 @@ static acpi_status
 register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
         int device;
-        unsigned long sun;
+        unsigned long long sun;
         char name[SLOT_NAME_SIZE];
         struct acpi_pci_slot *slot;
         struct pci_slot *pci_slot;
@@ -150,7 +150,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
         }
 
         snprintf(name, sizeof(name), "%u", (u32)sun);
-        pci_slot = pci_create_slot(pci_bus, device, name);
+        pci_slot = pci_create_slot(pci_bus, device, name, NULL);
         if (IS_ERR(pci_slot)) {
                 err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot));
                 kfree(slot);
@@ -182,7 +182,7 @@ static acpi_status
 walk_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
         int device, function;
-        unsigned long adr;
+        unsigned long long adr;
         acpi_status status;
         acpi_handle dummy_handle;
         acpi_walk_callback user_function;
@@ -239,7 +239,7 @@ static int
 walk_root_bridge(acpi_handle handle, acpi_walk_callback user_function)
 {
         int seg, bus;
-        unsigned long tmp;
+        unsigned long long tmp;
         acpi_status status;
         acpi_handle dummy_handle;
         struct pci_bus *pci_bus;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 4ab21cb1c8c7..bb7d50dd2818 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -44,9 +44,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define _COMPONENT              ACPI_POWER_COMPONENT
+#define _COMPONENT                      ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("power");
-#define ACPI_POWER_COMPONENT            0x00800000
 #define ACPI_POWER_CLASS                "power_resource"
 #define ACPI_POWER_DEVICE_NAME          "Power Resource"
 #define ACPI_POWER_FILE_INFO            "info"
@@ -54,6 +53,14 @@ ACPI_MODULE_NAME("power");
 #define ACPI_POWER_RESOURCE_STATE_OFF   0x00
 #define ACPI_POWER_RESOURCE_STATE_ON    0x01
 #define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
+
+#ifdef MODULE_PARAM_PREFIX
+#undef MODULE_PARAM_PREFIX
+#endif
+#define MODULE_PARAM_PREFIX "acpi."
+int acpi_power_nocheck;
+module_param_named(power_nocheck, acpi_power_nocheck, bool, 000);
+
 static int acpi_power_add(struct acpi_device *device);
 static int acpi_power_remove(struct acpi_device *device, int type);
 static int acpi_power_resume(struct acpi_device *device);
@@ -128,16 +135,16 @@ acpi_power_get_context(acpi_handle handle,
         return 0;
 }
 
-static int acpi_power_get_state(struct acpi_power_resource *resource, int *state)
+static int acpi_power_get_state(acpi_handle handle, int *state)
 {
         acpi_status status = AE_OK;
-        unsigned long sta = 0;
+        unsigned long long sta = 0;
 
 
-        if (!resource || !state)
+        if (!handle || !state)
                 return -EINVAL;
 
-        status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta);
+        status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
@@ -145,7 +152,8 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
                               ACPI_POWER_RESOURCE_STATE_OFF;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",
-                          resource->name, state ? "on" : "off"));
+                          acpi_ut_get_node_name(handle),
+                                *state ? "on" : "off"));
 
         return 0;
 }
@@ -153,7 +161,6 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
 static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 {
         int result = 0, state1;
-        struct acpi_power_resource *resource = NULL;
         u32 i = 0;
 
 
@@ -161,12 +168,15 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
                 return -EINVAL;
 
         /* The state of the list is 'on' IFF all resources are 'on'. */
+        /* */
 
         for (i = 0; i < list->count; i++) {
-                result = acpi_power_get_context(list->handles[i], &resource);
-                if (result)
-                        return result;
-                result = acpi_power_get_state(resource, &state1);
+                /*
+                 * The state of the power resource can be obtained by
+                 * using the ACPI handle. In such case it is unnecessary to
+                 * get the Power resource first and then get its state again.
+                 */
+                result = acpi_power_get_state(list->handles[i], &state1);
                 if (result)
                         return result;
 
@@ -226,12 +236,18 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
-        result = acpi_power_get_state(resource, &state);
-        if (result)
-                return result;
-        if (state != ACPI_POWER_RESOURCE_STATE_ON)
-                return -ENOEXEC;
-
+        if (!acpi_power_nocheck) {
+                /*
+                 * If acpi_power_nocheck is set, it is unnecessary to check
+                 * the power state after power transition.
+                 */
+                result = acpi_power_get_state(resource->device->handle,
+                                &state);
+                if (result)
+                        return result;
+                if (state != ACPI_POWER_RESOURCE_STATE_ON)
+                        return -ENOEXEC;
+        }
         /* Update the power resource's _device_ power state */
         resource->device->power.state = ACPI_STATE_D0;
 
@@ -277,11 +293,17 @@ static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev)
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
-        result = acpi_power_get_state(resource, &state);
-        if (result)
-                return result;
-        if (state != ACPI_POWER_RESOURCE_STATE_OFF)
-                return -ENOEXEC;
+        if (!acpi_power_nocheck) {
+                /*
+                 * If acpi_power_nocheck is set, it is unnecessary to check
+                 * the power state after power transition.
+                 */
+                result = acpi_power_get_state(handle, &state);
+                if (result)
+                        return result;
+                if (state != ACPI_POWER_RESOURCE_STATE_OFF)
+                        return -ENOEXEC;
+        }
 
         /* Update the power resource's _device_ power state */
         resource->device->power.state = ACPI_STATE_D3;
@@ -494,11 +516,6 @@ int acpi_power_transition(struct acpi_device *device, int state)
         cl = &device->power.states[device->power.state].resources;
         tl = &device->power.states[state].resources;
 
-        if (!cl->count && !tl->count) {
-                result = -ENODEV;
-                goto end;
-        }
-
         /* TBD: Resources must be ordered. */
 
         /*
@@ -555,7 +572,7 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset)
         if (!resource)
                 goto end;
 
-        result = acpi_power_get_state(resource, &state);
+        result = acpi_power_get_state(resource->device->handle, &state);
         if (result)
                 goto end;
 
@@ -657,7 +674,7 @@ static int acpi_power_add(struct acpi_device *device)
         strcpy(resource->name, device->pnp.bus_id);
         strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
-        acpi_driver_data(device) = resource;
+        device->driver_data = resource;
 
         /* Evalute the object to get the system level and resource order. */
         status = acpi_evaluate_object(device->handle, NULL, NULL, &buffer);
@@ -668,7 +685,7 @@ static int acpi_power_add(struct acpi_device *device)
         resource->system_level = acpi_object.power_resource.system_level;
         resource->order = acpi_object.power_resource.resource_order;
 
-        result = acpi_power_get_state(resource, &state);
+        result = acpi_power_get_state(device->handle, &state);
         if (result)
                 goto end;
 
@@ -733,9 +750,9 @@ static int acpi_power_resume(struct acpi_device *device)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        resource = (struct acpi_power_resource *)acpi_driver_data(device);
+        resource = acpi_driver_data(device);
 
-        result = acpi_power_get_state(resource, &state);
+        result = acpi_power_get_state(device->handle, &state);
         if (result)
                 return result;
 
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index ee68ac54c0d4..34948362f41d 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -59,7 +59,6 @@
 #include <acpi/acpi_drivers.h>
 #include <acpi/processor.h>
 
-#define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define ACPI_PROCESSOR_DEVICE_NAME      "Processor"
 #define ACPI_PROCESSOR_FILE_INFO        "info"
@@ -89,6 +88,7 @@ static int acpi_processor_handle_eject(struct acpi_processor *pr);
 
 
 static const struct acpi_device_id processor_device_ids[] = {
+        {ACPI_PROCESSOR_OBJECT_HID, 0},
         {ACPI_PROCESSOR_HID, 0},
         {"", 0},
 };
@@ -409,7 +409,7 @@ static int acpi_processor_remove_fs(struct acpi_device *device)
 /* Use the acpiid in MADT to map cpus in case of SMP */
 
 #ifndef CONFIG_SMP
-static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;}
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; }
 #else
 
 static struct acpi_table_madt *madt;
@@ -428,27 +428,35 @@ static int map_lapic_id(struct acpi_subtable_header *entry,
 }
 
 static int map_lsapic_id(struct acpi_subtable_header *entry,
-                  u32 acpi_id, int *apic_id)
+                int device_declaration, u32 acpi_id, int *apic_id)
 {
         struct acpi_madt_local_sapic *lsapic =
                 (struct acpi_madt_local_sapic *)entry;
+        u32 tmp = (lsapic->id << 8) | lsapic->eid;
+
         /* Only check enabled APICs*/
-        if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
-                /* First check against id */
-                if (lsapic->processor_id == acpi_id) {
-                        *apic_id = (lsapic->id << 8) | lsapic->eid;
-                        return 1;
-                /* Check against optional uid */
-                } else if (entry->length >= 16 &&
-                        lsapic->uid == acpi_id) {
-                        *apic_id = lsapic->uid;
-                        return 1;
-                }
-        }
+        if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
+                return 0;
+
+        /* Device statement declaration type */
+        if (device_declaration) {
+                if (entry->length < 16)
+                        printk(KERN_ERR PREFIX
+                            "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
+                            tmp);
+                else if (lsapic->uid == acpi_id)
+                        goto found;
+        /* Processor statement declaration type */
+        } else if (lsapic->processor_id == acpi_id)
+                goto found;
+
         return 0;
+found:
+        *apic_id = tmp;
+        return 1;
 }
 
-static int map_madt_entry(u32 acpi_id)
+static int map_madt_entry(int type, u32 acpi_id)
 {
         unsigned long madt_end, entry;
         int apic_id = -1;
@@ -469,7 +477,7 @@ static int map_madt_entry(u32 acpi_id)
                         if (map_lapic_id(header, acpi_id, &apic_id))
                                 break;
                 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
-                        if (map_lsapic_id(header, acpi_id, &apic_id))
+                        if (map_lsapic_id(header, type, acpi_id, &apic_id))
                                 break;
                 }
                 entry += header->length;
@@ -477,7 +485,7 @@ static int map_madt_entry(u32 acpi_id)
         return apic_id;
 }
 
-static int map_mat_entry(acpi_handle handle, u32 acpi_id)
+static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
 {
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
         union acpi_object *obj;
@@ -500,7 +508,7 @@ static int map_mat_entry(acpi_handle handle, u32 acpi_id)
         if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
                 map_lapic_id(header, acpi_id, &apic_id);
         } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
-                map_lsapic_id(header, acpi_id, &apic_id);
+                map_lsapic_id(header, type, acpi_id, &apic_id);
         }
 
 exit:
@@ -509,14 +517,14 @@ exit:
         return apic_id;
 }
 
-static int get_cpu_id(acpi_handle handle, u32 acpi_id)
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
 {
         int i;
         int apic_id = -1;
 
-        apic_id = map_mat_entry(handle, acpi_id);
+        apic_id = map_mat_entry(handle, type, acpi_id);
         if (apic_id == -1)
-                apic_id = map_madt_entry(acpi_id);
+                apic_id = map_madt_entry(type, acpi_id);
         if (apic_id == -1)
                 return apic_id;
 
@@ -532,15 +540,16 @@ static int get_cpu_id(acpi_handle handle, u32 acpi_id)
                                  Driver Interface
    -------------------------------------------------------------------------- */
 
-static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
+static int acpi_processor_get_info(struct acpi_device *device)
 {
         acpi_status status = 0;
         union acpi_object object = { 0 };
         struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
-        int cpu_index;
+        struct acpi_processor *pr;
+        int cpu_index, device_declaration = 0;
         static int cpu0_initialized;
 
-
+        pr = acpi_driver_data(device);
         if (!pr)
                 return -EINVAL;
 
@@ -561,22 +570,23 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                   "No bus mastering arbitration control\n"));
 
-        /* Check if it is a Device with HID and UID */
-        if (has_uid) {
-                unsigned long value;
+        if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_HID)) {
+                /*
+                 * Declared with "Device" statement; match _UID.
+                 * Note that we don't handle string _UIDs yet.
+                 */
+                unsigned long long value;
                 status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
                                                 NULL, &value);
                 if (ACPI_FAILURE(status)) {
-                        printk(KERN_ERR PREFIX "Evaluating processor _UID\n");
+                        printk(KERN_ERR PREFIX
+                            "Evaluating processor _UID [%#x]\n", status);
                         return -ENODEV;
                 }
+                device_declaration = 1;
                 pr->acpi_id = value;
         } else {
-                /*
-                * Evalute the processor object.  Note that it is common on SMP to
-                * have the first (boot) processor with a valid PBLK address while
-                * all others have a NULL address.
-                */
+                /* Declared with "Processor" statement; match ProcessorID */
                 status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
                 if (ACPI_FAILURE(status)) {
                         printk(KERN_ERR PREFIX "Evaluating processor object\n");
@@ -584,12 +594,13 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
                 }
 
                 /*
-                * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
-                *      >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c
-                */
+                 * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
+                 *      >>> 'acpi_get_processor_id(acpi_id, &id)' in
+                 *      arch/xxx/acpi.c
+                 */
                 pr->acpi_id = object.processor.proc_id;
         }
-        cpu_index = get_cpu_id(pr->handle, pr->acpi_id);
+        cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id);
 
         /* Handle UP system running SMP kernel, with no LAPIC in MADT */
         if (!cpu0_initialized && (cpu_index == -1) &&
@@ -661,7 +672,7 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device)
 
         pr = acpi_driver_data(device);
 
-        result = acpi_processor_get_info(pr, device->flags.unique_id);
+        result = acpi_processor_get_info(device);
         if (result) {
                 /* Processor is physically not present */
                 return 0;
@@ -761,20 +772,20 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
                 acpi_bus_generate_proc_event(device, event,
                                         pr->performance_platform_limit);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event,
+                                                  dev_name(&device->dev), event,
                                                   pr->performance_platform_limit);
                 break;
         case ACPI_PROCESSOR_NOTIFY_POWER:
                 acpi_processor_cst_has_changed(pr);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event, 0);
+                                                  dev_name(&device->dev), event, 0);
                 break;
         case ACPI_PROCESSOR_NOTIFY_THROTTLING:
                 acpi_processor_tstate_has_changed(pr);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event, 0);
+                                                  dev_name(&device->dev), event, 0);
         default:
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                   "Unsupported event [0x%x]\n", event));
@@ -818,7 +829,7 @@ static int acpi_processor_add(struct acpi_device *device)
         pr->handle = device->handle;
         strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
-        acpi_driver_data(device) = pr;
+        device->driver_data = pr;
 
         return 0;
 }
@@ -875,7 +886,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
 static int is_processor_present(acpi_handle handle)
 {
         acpi_status status;
-        unsigned long sta = 0;
+        unsigned long long sta = 0;
 
 
         status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index cf5b1b7b684f..5f8d746a9b81 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -59,7 +59,6 @@
 #include <acpi/processor.h>
 #include <asm/processor.h>
 
-#define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_idle");
@@ -1587,6 +1586,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 
         if (acpi_idle_bm_check()) {
                 if (dev->safe_state) {
+                        dev->last_state = dev->safe_state;
                         return dev->safe_state->enter(dev, dev->safe_state);
                 } else {
                         local_irq_disable();
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 80c251ec6d2a..0d7b772bef50 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -39,10 +39,14 @@
 #include <asm/uaccess.h>
 #endif
 
+#ifdef CONFIG_X86
+#include <asm/cpufeature.h>
+#endif
+
 #include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
 #include <acpi/processor.h>
 
-#define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
@@ -126,7 +130,7 @@ static struct notifier_block acpi_ppc_notifier_block = {
 static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 {
         acpi_status status = 0;
-        unsigned long ppc = 0;
+        unsigned long long ppc = 0;
 
 
         if (!pr)
@@ -334,7 +338,6 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
         acpi_status status = AE_OK;
         acpi_handle handle = NULL;
 
-
         if (!pr || !pr->performance || !pr->handle)
                 return -EINVAL;
 
@@ -347,13 +350,27 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
 
         result = acpi_processor_get_performance_control(pr);
         if (result)
-                return result;
+                goto update_bios;
 
         result = acpi_processor_get_performance_states(pr);
         if (result)
-                return result;
+                goto update_bios;
 
         return 0;
+
+        /*
+         * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that
+         * the BIOS is older than the CPU and does not know its frequencies
+         */
+ update_bios:
+#ifdef CONFIG_X86
+        if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){
+                if(boot_cpu_has(X86_FEATURE_EST))
+                        printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
+                               "frequency support\n");
+        }
+#endif
+        return result;
 }
 
 int acpi_processor_notify_smm(struct module *calling_module)
@@ -524,13 +541,13 @@ static int acpi_processor_get_psd(struct acpi_processor	*pr)
 
         psd = buffer.pointer;
         if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _PSD data\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (psd->package.count != 1) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _PSD data\n");
                 result = -EFAULT;
                 goto end;
         }
@@ -543,19 +560,19 @@ static int acpi_processor_get_psd(struct acpi_processor	*pr)
         status = acpi_extract_package(&(psd->package.elements[0]),
                 &format, &state);
         if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _PSD data\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n"));
+                printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n"));
+                printk(KERN_ERR PREFIX "Unknown _PSD:revision\n");
                 result = -EFAULT;
                 goto end;
         }
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index ef34b18f95ca..b1eb376fae45 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -40,7 +40,6 @@
 #include <acpi/processor.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_thermal");
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index a56fc6c4394b..a0c38c94a8a0 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -38,9 +38,9 @@
 #include <asm/uaccess.h>
 
 #include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
 #include <acpi/processor.h>
 
-#define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_throttling");
@@ -274,7 +274,7 @@ static int acpi_processor_throttling_notifier(unsigned long event, void *data)
 static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 {
         acpi_status status = 0;
-        unsigned long tpc = 0;
+        unsigned long long tpc = 0;
 
         if (!pr)
                 return -EINVAL;
@@ -528,13 +528,13 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
 
         tsd = buffer.pointer;
         if (!tsd || (tsd->type != ACPI_TYPE_PACKAGE)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _TSD data\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (tsd->package.count != 1) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _TSD data\n");
                 result = -EFAULT;
                 goto end;
         }
@@ -547,19 +547,19 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
         status = acpi_extract_package(&(tsd->package.elements[0]),
                                       &format, &state);
         if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
+                printk(KERN_ERR PREFIX "Invalid _TSD data\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (pdomain->num_entries != ACPI_TSD_REV0_ENTRIES) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _TSD:num_entries\n"));
+                printk(KERN_ERR PREFIX "Unknown _TSD:num_entries\n");
                 result = -EFAULT;
                 goto end;
         }
 
         if (pdomain->revision != ACPI_TSD_REV0_REVISION) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _TSD:revision\n"));
+                printk(KERN_ERR PREFIX "Unknown _TSD:revision\n");
                 result = -EFAULT;
                 goto end;
         }
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
index d9063ea414e3..8eaaecf92009 100644
--- a/drivers/acpi/resources/rscalc.c
+++ b/drivers/acpi/resources/rscalc.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acresrc.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 
 #define _COMPONENT          ACPI_RESOURCES
@@ -560,8 +559,8 @@ acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object,
                               ACPI_GET_OBJECT_TYPE(*sub_object_list)) ||
                              ((ACPI_TYPE_LOCAL_REFERENCE ==
                                ACPI_GET_OBJECT_TYPE(*sub_object_list)) &&
-                              ((*sub_object_list)->reference.opcode ==
-                               AML_INT_NAMEPATH_OP)))) {
+                              ((*sub_object_list)->reference.class ==
+                               ACPI_REFCLASS_NAME)))) {
                                 name_found = TRUE;
                         } else {
                                 /* Look at the next element */
diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c
index 7804a8c40e7a..c0bbfa2c4193 100644
--- a/drivers/acpi/resources/rscreate.c
+++ b/drivers/acpi/resources/rscreate.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acresrc.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 
 #define _COMPONENT          ACPI_RESOURCES
@@ -310,13 +309,12 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
                         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                                if (obj_desc->reference.opcode !=
-                                    AML_INT_NAMEPATH_OP) {
+                                if (obj_desc->reference.class !=
+                                    ACPI_REFCLASS_NAME) {
                                         ACPI_ERROR((AE_INFO,
-                                                    "(PRT[%X].Source) Need name, found reference op %X",
+                                                    "(PRT[%X].Source) Need name, found Reference Class %X",
                                                     index,
-                                                    obj_desc->reference.
-                                                    opcode));
+                                                    obj_desc->reference.class));
                                         return_ACPI_STATUS(AE_BAD_DATA);
                                 }
 
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 7b011e7e29fe..6050ce481873 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -931,7 +931,7 @@ static int acpi_sbs_add(struct acpi_device *device)
         sbs->device = device;
         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
-        acpi_driver_data(device) = sbs;
+        device->driver_data = sbs;
 
         result = acpi_charger_add(sbs);
         if (result)
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index a4e3767b8c64..e53e590252c0 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -258,7 +258,7 @@ extern int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 static int acpi_smbus_hc_add(struct acpi_device *device)
 {
         int status;
-        unsigned long val;
+        unsigned long long val;
         struct acpi_smb_hc *hc;
 
         if (!device)
@@ -282,7 +282,7 @@ static int acpi_smbus_hc_add(struct acpi_device *device)
         hc->ec = acpi_driver_data(device->parent);
         hc->offset = (val >> 8) & 0xff;
         hc->query_bit = val & 0xff;
-        acpi_driver_data(device) = hc;
+        device->driver_data = hc;
 
         acpi_ec_add_query_handler(hc->ec, hc->query_bit, NULL, smbus_alarm, hc);
         printk(KERN_INFO PREFIX "SBS HC: EC = 0x%p, offset = 0x%0x, query_bit = 0x%0x\n",
@@ -303,7 +303,7 @@ static int acpi_smbus_hc_remove(struct acpi_device *device, int type)
         hc = acpi_driver_data(device);
         acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
         kfree(hc);
-        acpi_driver_data(device) = NULL;
+        device->driver_data = NULL;
         return 0;
 }
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f6f52c1a2aba..39b7233c3485 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -109,20 +109,19 @@ static int acpi_bus_hot_remove_device(void *context)
                 return 0;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                "Hot-removing device %s...\n", device->dev.bus_id));
-
+                "Hot-removing device %s...\n", dev_name(&device->dev)));
 
         if (acpi_bus_trim(device, 1)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                "Removing device failed\n"));
+                printk(KERN_ERR PREFIX
+                                "Removing device failed\n");
                 return -1;
         }
 
         /* power off device */
         status = acpi_evaluate_object(handle, "_PS3", NULL, NULL);
         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
-                ACPI_DEBUG_PRINT((ACPI_DB_WARN,
-                                "Power-off device failed\n"));
+                printk(KERN_WARNING PREFIX
+                                "Power-off device failed\n");
 
         if (device->flags.lockable) {
                 arg_list.count = 1;
@@ -276,6 +275,13 @@ int acpi_match_device_ids(struct acpi_device *device,
 {
         const struct acpi_device_id *id;
 
+        /*
+         * If the device is not present, it is unnecessary to load device
+         * driver for it.
+         */
+        if (!device->status.present)
+                return -ENODEV;
+
         if (device->flags.hardware_id) {
                 for (id = ids; id->id[0]; id++) {
                         if (!strcmp((char*)id->id, device->pnp.hardware_id))
@@ -384,7 +390,7 @@ static int acpi_device_remove(struct device * dev)
                         acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
         }
         acpi_dev->driver = NULL;
-        acpi_driver_data(dev) = NULL;
+        acpi_dev->driver_data = NULL;
 
         put_device(dev);
         return 0;
@@ -453,7 +459,7 @@ static int acpi_device_register(struct acpi_device *device,
                 acpi_device_bus_id->instance_no = 0;
                 list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
         }
-        sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
+        dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
 
         if (device->parent) {
                 list_add_tail(&device->node, &device->parent->children);
@@ -477,7 +483,8 @@ static int acpi_device_register(struct acpi_device *device,
 
         result = acpi_device_setup_files(device);
         if(result)
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id));
+                printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n",
+                       dev_name(&device->dev));
 
         device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
         return 0;
@@ -537,7 +544,7 @@ acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
         result = driver->ops.add(device);
         if (result) {
                 device->driver = NULL;
-                acpi_driver_data(device) = NULL;
+                device->driver_data = NULL;
                 return result;
         }
 
@@ -807,6 +814,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
         /* TBD: System wake support and resource requirements. */
 
         device->power.state = ACPI_STATE_UNKNOWN;
+        acpi_bus_get_power(device->handle, &(device->power.state));
 
         return 0;
 }
@@ -901,36 +909,6 @@ static void acpi_device_get_busid(struct acpi_device *device,
         }
 }
 
-static int
-acpi_video_bus_match(struct acpi_device *device)
-{
-        acpi_handle h_dummy;
-
-        if (!device)
-                return -EINVAL;
-
-        /* Since there is no HID, CID for ACPI Video drivers, we have
-         * to check well known required nodes for each feature we support.
-         */
-
-        /* Does this device able to support video switching ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy)))
-                return 0;
-
-        /* Does this device able to retrieve a video ROM ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy)))
-                return 0;
-
-        /* Does this device able to configure which video head to be POSTed ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy)))
-                return 0;
-
-        return -ENODEV;
-}
-
 /*
  * acpi_bay_match - see if a device is an ejectable driver bay
  *
@@ -1013,7 +991,7 @@ static void acpi_device_set_id(struct acpi_device *device,
                    will get autoloaded and the device might still match
                    against another driver.
                 */
-                if (ACPI_SUCCESS(acpi_video_bus_match(device)))
+                if (acpi_is_video_device(device))
                         cid_add = ACPI_VIDEO_HID;
                 else if (ACPI_SUCCESS(acpi_bay_match(device)))
                         cid_add = ACPI_BAY_HID;
@@ -1025,7 +1003,7 @@ static void acpi_device_set_id(struct acpi_device *device,
                 hid = ACPI_POWER_HID;
                 break;
         case ACPI_BUS_TYPE_PROCESSOR:
-                hid = ACPI_PROCESSOR_HID;
+                hid = ACPI_PROCESSOR_OBJECT_HID;
                 break;
         case ACPI_BUS_TYPE_SYSTEM:
                 hid = ACPI_SYSTEM_HID;
@@ -1153,20 +1131,6 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 }
 
 static int
-acpi_is_child_device(struct acpi_device *device,
-                        int (*matcher)(struct acpi_device *))
-{
-        int result = -ENODEV;
-
-        do {
-                if (ACPI_SUCCESS(matcher(device)))
-                        return AE_OK;
-        } while ((device = device->parent));
-
-        return result;
-}
-
-static int
 acpi_add_single_object(struct acpi_device **child,
                        struct acpi_device *parent, acpi_handle handle, int type,
                         struct acpi_bus_ops *ops)
@@ -1221,15 +1185,18 @@ acpi_add_single_object(struct acpi_device **child,
                         result = -ENODEV;
                         goto end;
                 }
-                if (!device->status.present) {
-                        /* Bay and dock should be handled even if absent */
-                        if (!ACPI_SUCCESS(
-                             acpi_is_child_device(device, acpi_bay_match)) &&
-                            !ACPI_SUCCESS(
-                             acpi_is_child_device(device, acpi_dock_match))) {
-                                        result = -ENODEV;
-                                        goto end;
-                        }
+                /*
+                 * When the device is neither present nor functional, the
+                 * device should not be added to Linux ACPI device tree.
+                 * When the status of the device is not present but functinal,
+                 * it should be added to Linux ACPI tree. For example : bay
+                 * device , dock device.
+                 * In such conditions it is unncessary to check whether it is
+                 * bay device or dock device.
+                 */
+                if (!device->status.present && !device->status.functional) {
+                        result = -ENODEV;
+                        goto end;
                 }
                 break;
         default:
@@ -1252,6 +1219,16 @@ acpi_add_single_object(struct acpi_device **child,
         acpi_device_set_id(device, parent, handle, type);
 
         /*
+         * The ACPI device is attached to acpi handle before getting
+         * the power/wakeup/peformance flags. Otherwise OS can't get
+         * the corresponding ACPI device by the acpi handle in the course
+         * of getting the power/wakeup/performance flags.
+         */
+        result = acpi_device_set_context(device, type);
+        if (result)
+                goto end;
+
+        /*
          * Power Management
          * ----------------
          */
@@ -1281,8 +1258,6 @@ acpi_add_single_object(struct acpi_device **child,
                         goto end;
         }
 
-        if ((result = acpi_device_set_context(device, type)))
-                goto end;
 
         result = acpi_device_register(device, parent);
 
@@ -1402,7 +1377,12 @@ static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
                  * TBD: Need notifications and other detection mechanisms
                  *      in place before we can fully implement this.
                  */
-                if (child->status.present) {
+                 /*
+                 * When the device is not present but functional, it is also
+                 * necessary to scan the children of this device.
+                 */
+                if (child->status.present || (!child->status.present &&
+                                        child->status.functional)) {
                         status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
                                                       NULL, NULL);
                         if (ACPI_SUCCESS(status)) {
@@ -1545,7 +1525,6 @@ static int acpi_bus_scan_fixed(struct acpi_device *root)
         return result;
 }
 
-int __init acpi_boot_ec_enable(void);
 
 static int __init acpi_scan_init(void)
 {
@@ -1579,9 +1558,6 @@ static int __init acpi_scan_init(void)
          */
         result = acpi_bus_scan_fixed(acpi_root);
 
-        /* EC region might be needed at bus_scan, so enable it now */
-        acpi_boot_ec_enable();
-
         if (!result)
                 result = acpi_bus_scan(acpi_root, &ops);
 
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index d13194a031bf..28a691cc625e 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -15,6 +15,7 @@
 #include <linux/dmi.h>
 #include <linux/device.h>
 #include <linux/suspend.h>
+#include <linux/reboot.h>
 
 #include <asm/io.h>
 
@@ -24,6 +25,36 @@
 
 u8 sleep_states[ACPI_S_STATE_COUNT];
 
+static void acpi_sleep_tts_switch(u32 acpi_state)
+{
+        union acpi_object in_arg = { ACPI_TYPE_INTEGER };
+        struct acpi_object_list arg_list = { 1, &in_arg };
+        acpi_status status = AE_OK;
+
+        in_arg.integer.value = acpi_state;
+        status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL);
+        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+                /*
+                 * OS can't evaluate the _TTS object correctly. Some warning
+                 * message will be printed. But it won't break anything.
+                 */
+                printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
+        }
+}
+
+static int tts_notify_reboot(struct notifier_block *this,
+                        unsigned long code, void *x)
+{
+        acpi_sleep_tts_switch(ACPI_STATE_S5);
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block tts_notifier = {
+        .notifier_call  = tts_notify_reboot,
+        .next           = NULL,
+        .priority       = 0,
+};
+
 static int acpi_sleep_prepare(u32 acpi_state)
 {
 #ifdef CONFIG_ACPI_SLEEP
@@ -45,9 +76,8 @@ static int acpi_sleep_prepare(u32 acpi_state)
         return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_ACPI_SLEEP
 static u32 acpi_target_sleep_state = ACPI_STATE_S0;
-
 /*
  * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
  * user to request that behavior by using the 'acpi_old_suspend_ordering'
@@ -60,6 +90,18 @@ void __init acpi_old_suspend_ordering(void)
         old_suspend_ordering = true;
 }
 
+/*
+ * According to the ACPI specification the BIOS should make sure that ACPI is
+ * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states.  Still,
+ * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI
+ * on such systems during resume.  Unfortunately that doesn't help in
+ * particularly pathological cases in which SCI_EN has to be set directly on
+ * resume, although the specification states very clearly that this flag is
+ * owned by the hardware.  The set_sci_en_on_resume variable will be set in such
+ * cases.
+ */
+static bool set_sci_en_on_resume;
+
 /**
  *      acpi_pm_disable_gpes - Disable the GPEs.
  */
@@ -131,8 +173,11 @@ static void acpi_pm_end(void)
          * failing transition to a sleep state.
          */
         acpi_target_sleep_state = ACPI_STATE_S0;
+        acpi_sleep_tts_switch(acpi_target_sleep_state);
 }
-#endif /* CONFIG_PM_SLEEP */
+#else /* !CONFIG_ACPI_SLEEP */
+#define acpi_target_sleep_state ACPI_STATE_S0
+#endif /* CONFIG_ACPI_SLEEP */
 
 #ifdef CONFIG_SUSPEND
 extern void do_suspend_lowlevel(void);
@@ -155,6 +200,7 @@ static int acpi_suspend_begin(suspend_state_t pm_state)
 
         if (sleep_states[acpi_state]) {
                 acpi_target_sleep_state = acpi_state;
+                acpi_sleep_tts_switch(acpi_target_sleep_state);
         } else {
                 printk(KERN_ERR "ACPI does not support this state: %d\n",
                         pm_state);
@@ -200,6 +246,12 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
                 break;
         }
 
+        /* If ACPI is not enabled by the BIOS, we need to enable it here. */
+        if (set_sci_en_on_resume)
+                acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
+        else
+                acpi_enable();
+
         /* Reprogram control registers and execute _BFS */
         acpi_leave_sleep_state_prep(acpi_state);
 
@@ -287,6 +339,12 @@ static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
         return 0;
 }
 
+static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d)
+{
+        set_sci_en_on_resume = true;
+        return 0;
+}
+
 static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
         {
         .callback = init_old_suspend_ordering,
@@ -296,6 +354,30 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
                 DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
                 },
         },
+        {
+        .callback = init_old_suspend_ordering,
+        .ident = "HP xw4600 Workstation",
+        .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+                DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
+                },
+        },
+        {
+        .callback = init_set_sci_en_on_resume,
+        .ident = "Apple MacBook 1,1",
+        .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
+                },
+        },
+        {
+        .callback = init_set_sci_en_on_resume,
+        .ident = "Apple MacMini 1,1",
+        .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
+                },
+        },
         {},
 };
 #endif /* CONFIG_SUSPEND */
@@ -313,6 +395,7 @@ void __init acpi_no_s4_hw_signature(void)
 static int acpi_hibernation_begin(void)
 {
         acpi_target_sleep_state = ACPI_STATE_S4;
+        acpi_sleep_tts_switch(acpi_target_sleep_state);
         return 0;
 }
 
@@ -376,7 +459,15 @@ static struct platform_hibernation_ops acpi_hibernation_ops = {
  */
 static int acpi_hibernation_begin_old(void)
 {
-        int error = acpi_sleep_prepare(ACPI_STATE_S4);
+        int error;
+        /*
+         * The _TTS object should always be evaluated before the _PTS object.
+         * When the old_suspended_ordering is true, the _PTS object is
+         * evaluated in the acpi_sleep_prepare.
+         */
+        acpi_sleep_tts_switch(ACPI_STATE_S4);
+
+        error = acpi_sleep_prepare(ACPI_STATE_S4);
 
         if (!error)
                 acpi_target_sleep_state = ACPI_STATE_S4;
@@ -444,7 +535,7 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
         acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
         struct acpi_device *adev;
         char acpi_method[] = "_SxD";
-        unsigned long d_min, d_max;
+        unsigned long long d_min, d_max;
 
         if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
                 printk(KERN_DEBUG "ACPI handle has no context!\n");
@@ -596,5 +687,10 @@ int __init acpi_sleep_init(void)
                 pm_power_off = acpi_power_off;
         }
         printk(")\n");
+        /*
+         * Register the tts_notifier to reboot notifier list so that the _TTS
+         * object can also be evaluated when the system enters S5.
+         */
+        register_reboot_notifier(&tts_notifier);
         return 0;
 }
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 631ee2ee2ca0..4dbc2271acf5 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -367,7 +367,7 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
                 if (ldev)
                         seq_printf(seq, "%s:%s",
                                    ldev->bus ? ldev->bus->name : "no-bus",
-                                   ldev->bus_id);
+                                   dev_name(ldev));
                 seq_printf(seq, "\n");
                 put_device(ldev);
 
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
index 38655eb132dc..dea4c23df764 100644
--- a/drivers/acpi/sleep/wakeup.c
+++ b/drivers/acpi/sleep/wakeup.c
@@ -88,7 +88,7 @@ void acpi_enable_wakeup_device(u8 sleep_state)
                 spin_unlock(&acpi_device_lock);
                 if (!dev->wakeup.flags.run_wake)
                         acpi_enable_gpe(dev->wakeup.gpe_device,
-                                        dev->wakeup.gpe_number, ACPI_ISR);
+                                        dev->wakeup.gpe_number);
                 spin_lock(&acpi_device_lock);
         }
         spin_unlock(&acpi_device_lock);
@@ -122,7 +122,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
                                                   ACPI_GPE_TYPE_WAKE_RUN);
                                 /* Re-enable it, since set_gpe_type will disable it */
                                 acpi_enable_gpe(dev->wakeup.gpe_device,
-                                                dev->wakeup.gpe_number, ACPI_NOT_ISR);
+                                                dev->wakeup.gpe_number);
                                 spin_lock(&acpi_device_lock);
                         }
                         continue;
@@ -133,7 +133,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
                 /* Never disable run-wake GPE */
                 if (!dev->wakeup.flags.run_wake) {
                         acpi_disable_gpe(dev->wakeup.gpe_device,
-                                         dev->wakeup.gpe_number, ACPI_NOT_ISR);
+                                         dev->wakeup.gpe_number);
                         acpi_clear_gpe(dev->wakeup.gpe_device,
                                        dev->wakeup.gpe_number, ACPI_NOT_ISR);
                 }
@@ -162,7 +162,7 @@ static int __init acpi_wakeup_device_init(void)
                                   dev->wakeup.gpe_number,
                                   ACPI_GPE_TYPE_WAKE_RUN);
                 acpi_enable_gpe(dev->wakeup.gpe_device,
-                                dev->wakeup.gpe_number, ACPI_NOT_ISR);
+                                dev->wakeup.gpe_number);
                 dev->wakeup.state.enabled = 1;
                 spin_lock(&acpi_device_lock);
         }
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 24e80fd927e2..6e4107f82403 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -78,9 +78,15 @@ static ssize_t acpi_table_show(struct kobject *kobj,
             container_of(bin_attr, struct acpi_table_attr, attr);
         struct acpi_table_header *table_header = NULL;
         acpi_status status;
+        char name[ACPI_NAME_SIZE];
+
+        if (strncmp(table_attr->name, "NULL", 4))
+                memcpy(name, table_attr->name, ACPI_NAME_SIZE);
+        else
+                memcpy(name, "\0\0\0\0", 4);
 
         status =
-            acpi_get_table(table_attr->name, table_attr->instance,
+            acpi_get_table(name, table_attr->instance,
                            &table_header);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
@@ -95,21 +101,24 @@ static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
         struct acpi_table_header *header = NULL;
         struct acpi_table_attr *attr = NULL;
 
-        memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);
+        if (table_header->signature[0] != '\0')
+                memcpy(table_attr->name, table_header->signature,
+                        ACPI_NAME_SIZE);
+        else
+                memcpy(table_attr->name, "NULL", 4);
 
         list_for_each_entry(attr, &acpi_table_attr_list, node) {
-                if (!memcmp(table_header->signature, attr->name,
-                            ACPI_NAME_SIZE))
+                if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
                         if (table_attr->instance < attr->instance)
                                 table_attr->instance = attr->instance;
         }
         table_attr->instance++;
 
         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
-                                         !acpi_get_table(table_header->
-                                                         signature, 2,
-                                                         &header)))
-                sprintf(table_attr->name + 4, "%d", table_attr->instance);
+                                        !acpi_get_table
+                                        (table_header->signature, 2, &header)))
+                sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
+                        table_attr->instance);
 
         table_attr->attr.size = 0;
         table_attr->attr.read = acpi_table_show;
@@ -167,7 +176,6 @@ static int acpi_system_sysfs_init(void)
 #define COUNT_ERROR 2   /* other */
 #define NUM_COUNTERS_EXTRA 3
 
-#define ACPI_EVENT_VALID        0x01
 struct event_counter {
         u32 count;
         u32 flags;
@@ -312,12 +320,6 @@ static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
                 result = acpi_get_event_status(index - num_gpes, status);
 
-        /*
-         * sleep/power button GPE/Fixed Event is enabled after acpi_system_init,
-         * check the status at runtime and mark it as valid once it's enabled
-         */
-        if (!result && (*status & ACPI_EVENT_FLAG_ENABLED))
-                all_counters[index].flags |= ACPI_EVENT_VALID;
 end:
         return result;
 }
@@ -346,12 +348,14 @@ static ssize_t counter_show(struct kobject *kobj,
         if (result)
                 goto end;
 
-        if (!(all_counters[index].flags & ACPI_EVENT_VALID))
-                size += sprintf(buf + size, "  invalid");
+        if (!(status & ACPI_EVENT_FLAG_HANDLE))
+                size += sprintf(buf + size, "   invalid");
         else if (status & ACPI_EVENT_FLAG_ENABLED)
-                size += sprintf(buf + size, "   enable");
+                size += sprintf(buf + size, "   enabled");
+        else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
+                size += sprintf(buf + size, "   wake_enabled");
         else
-                size += sprintf(buf + size, "  disable");
+                size += sprintf(buf + size, "   disabled");
 
 end:
         size += sprintf(buf + size, "\n");
@@ -385,19 +389,19 @@ static ssize_t counter_set(struct kobject *kobj,
         if (result)
                 goto end;
 
-        if (!(all_counters[index].flags & ACPI_EVENT_VALID)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_WARN,
-                        "Can not change Invalid GPE/Fixed Event status\n"));
+        if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
+                printk(KERN_WARNING PREFIX
+                        "Can not change Invalid GPE/Fixed Event status\n");
                 return -EINVAL;
         }
 
         if (index < num_gpes) {
                 if (!strcmp(buf, "disable\n") &&
                                 (status & ACPI_EVENT_FLAG_ENABLED))
-                        result = acpi_disable_gpe(handle, index, ACPI_NOT_ISR);
+                        result = acpi_disable_gpe(handle, index);
                 else if (!strcmp(buf, "enable\n") &&
                                 !(status & ACPI_EVENT_FLAG_ENABLED))
-                        result = acpi_enable_gpe(handle, index, ACPI_NOT_ISR);
+                        result = acpi_enable_gpe(handle, index);
                 else if (!strcmp(buf, "clear\n") &&
                                 (status & ACPI_EVENT_FLAG_SET))
                         result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
diff --git a/drivers/acpi/tables/tbfadt.c b/drivers/acpi/tables/tbfadt.c
index a4a41ba2484b..2817158fb6a1 100644
--- a/drivers/acpi/tables/tbfadt.c
+++ b/drivers/acpi/tables/tbfadt.c
@@ -50,7 +50,7 @@ ACPI_MODULE_NAME("tbfadt")
 /* Local prototypes */
 static void inline
 acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
-                             u8 bit_width, u64 address);
+                             u8 byte_width, u64 address);
 
 static void acpi_tb_convert_fadt(void);
 
@@ -111,7 +111,7 @@ static struct acpi_fadt_info fadt_info_table[] = {
  * FUNCTION:    acpi_tb_init_generic_address
  *
  * PARAMETERS:  generic_address     - GAS struct to be initialized
- *              bit_width           - Width of this register
+ *              byte_width          - Width of this register
  *              Address             - Address of the register
  *
  * RETURN:      None
@@ -124,7 +124,7 @@ static struct acpi_fadt_info fadt_info_table[] = {
 
 static void inline
 acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
-                             u8 bit_width, u64 address)
+                             u8 byte_width, u64 address)
 {
 
         /*
@@ -136,7 +136,7 @@ acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
         /* All other fields are byte-wide */
 
         generic_address->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
-        generic_address->bit_width = bit_width;
+        generic_address->bit_width = byte_width << 3;
         generic_address->bit_offset = 0;
         generic_address->access_width = 0;
 }
@@ -304,7 +304,7 @@ static void acpi_tb_convert_fadt(void)
          * The ACPI 1.0 reserved fields that will be zeroed are the bytes located at
          * offset 45, 55, 95, and the word located at offset 109, 110.
          */
-        if (acpi_gbl_FADT.header.revision < 3) {
+        if (acpi_gbl_FADT.header.revision < FADT2_REVISION_ID) {
                 acpi_gbl_FADT.preferred_profile = 0;
                 acpi_gbl_FADT.pstate_control = 0;
                 acpi_gbl_FADT.cst_control = 0;
@@ -342,9 +342,20 @@ static void acpi_tb_convert_fadt(void)
          * useful to calculate them once, here.
          *
          * The PM event blocks are split into two register blocks, first is the
-         * PM Status Register block, followed immediately by the PM Enable Register
-         * block. Each is of length (pm1_event_length/2)
+         * PM Status Register block, followed immediately by the PM Enable
+         * Register block. Each is of length (xpm1x_event_block.bit_width/2).
+         *
+         * On various systems the v2 fields (and particularly the bit widths)
+         * cannot be relied upon, though. Hence resort to using the v1 length
+         * here (and warn about the inconsistency).
          */
+        if (acpi_gbl_FADT.xpm1a_event_block.bit_width
+            != acpi_gbl_FADT.pm1_event_length * 8)
+                printk(KERN_WARNING "FADT: "
+                       "X_PM1a_EVT_BLK.bit_width (%u) does not match"
+                       " PM1_EVT_LEN (%u)\n",
+                       acpi_gbl_FADT.xpm1a_event_block.bit_width,
+                       acpi_gbl_FADT.pm1_event_length);
         pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
 
         /* The PM1A register block is required */
@@ -360,13 +371,20 @@ static void acpi_tb_convert_fadt(void)
         /* The PM1B register block is optional, ignore if not present */
 
         if (acpi_gbl_FADT.xpm1b_event_block.address) {
+                if (acpi_gbl_FADT.xpm1b_event_block.bit_width
+                    != acpi_gbl_FADT.pm1_event_length * 8)
+                        printk(KERN_WARNING "FADT: "
+                               "X_PM1b_EVT_BLK.bit_width (%u) does not match"
+                               " PM1_EVT_LEN (%u)\n",
+                               acpi_gbl_FADT.xpm1b_event_block.bit_width,
+                               acpi_gbl_FADT.pm1_event_length);
                 acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
                                              pm1_register_length,
                                              (acpi_gbl_FADT.xpm1b_event_block.
                                               address + pm1_register_length));
                 /* Don't forget to copy space_id of the GAS */
                 acpi_gbl_xpm1b_enable.space_id =
-                    acpi_gbl_FADT.xpm1a_event_block.space_id;
+                    acpi_gbl_FADT.xpm1b_event_block.space_id;
 
         }
 }
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index b22185f55a16..18747ce8dd2f 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -110,7 +110,6 @@ acpi_status
 acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
 {
         u32 i;
-        u32 length;
         acpi_status status = AE_OK;
 
         ACPI_FUNCTION_TRACE(tb_add_table);
@@ -145,25 +144,64 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
                         }
                 }
 
-                length = ACPI_MIN(table_desc->length,
-                                  acpi_gbl_root_table_list.tables[i].length);
+                /*
+                 * Check for a table match on the entire table length,
+                 * not just the header.
+                 */
+                if (table_desc->length !=
+                    acpi_gbl_root_table_list.tables[i].length) {
+                        continue;
+                }
+
                 if (ACPI_MEMCMP(table_desc->pointer,
                                 acpi_gbl_root_table_list.tables[i].pointer,
-                                length)) {
+                                acpi_gbl_root_table_list.tables[i].length)) {
                         continue;
                 }
 
-                /* Table is already registered */
-
+                /*
+                 * Note: the current mechanism does not unregister a table if it is
+                 * dynamically unloaded. The related namespace entries are deleted,
+                 * but the table remains in the root table list.
+                 *
+                 * The assumption here is that the number of different tables that
+                 * will be loaded is actually small, and there is minimal overhead
+                 * in just keeping the table in case it is needed again.
+                 *
+                 * If this assumption changes in the future (perhaps on large
+                 * machines with many table load/unload operations), tables will
+                 * need to be unregistered when they are unloaded, and slots in the
+                 * root table list should be reused when empty.
+                 */
+
+                /*
+                 * Table is already registered.
+                 * We can delete the table that was passed as a parameter.
+                 */
                 acpi_tb_delete_table(table_desc);
                 *table_index = i;
-                status = AE_ALREADY_EXISTS;
-                goto release;
+
+                if (acpi_gbl_root_table_list.tables[i].
+                    flags & ACPI_TABLE_IS_LOADED) {
+
+                        /* Table is still loaded, this is an error */
+
+                        status = AE_ALREADY_EXISTS;
+                        goto release;
+                } else {
+                        /* Table was unloaded, allow it to be reloaded */
+
+                        table_desc->pointer =
+                            acpi_gbl_root_table_list.tables[i].pointer;
+                        table_desc->address =
+                            acpi_gbl_root_table_list.tables[i].address;
+                        status = AE_OK;
+                        goto print_header;
+                }
         }
 
-        /*
-         * Add the table to the global table list
-         */
+        /* Add the table to the global root table list */
+
         status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
                                      table_desc->length, table_desc->flags,
                                      table_index);
@@ -171,6 +209,7 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
                 goto release;
         }
 
+      print_header:
         acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
 
       release:
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 912703691d36..073ff09218a9 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -47,7 +47,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_THERMAL_COMPONENT          0x04000000
 #define ACPI_THERMAL_CLASS              "thermal_zone"
 #define ACPI_THERMAL_DEVICE_NAME        "Thermal Zone"
 #define ACPI_THERMAL_FILE_STATE         "state"
@@ -246,18 +245,18 @@ static const struct file_operations acpi_thermal_polling_fops = {
 static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
 {
         acpi_status status = AE_OK;
-
+        unsigned long long tmp;
 
         if (!tz)
                 return -EINVAL;
 
         tz->last_temperature = tz->temperature;
 
-        status =
-            acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature);
+        status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
+        tz->temperature = tmp;
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
                           tz->temperature));
 
@@ -267,17 +266,16 @@ static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
 {
         acpi_status status = AE_OK;
-
+        unsigned long long tmp;
 
         if (!tz)
                 return -EINVAL;
 
-        status =
-            acpi_evaluate_integer(tz->device->handle, "_TZP", NULL,
-                                  &tz->polling_frequency);
+        status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
+        tz->polling_frequency = tmp;
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
                           tz->polling_frequency));
 
@@ -356,6 +354,7 @@ do {	\
 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 {
         acpi_status status = AE_OK;
+        unsigned long long tmp;
         struct acpi_handle_list devices;
         int valid = 0;
         int i;
@@ -363,7 +362,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
         /* Critical Shutdown (required) */
         if (flag & ACPI_TRIPS_CRITICAL) {
                 status = acpi_evaluate_integer(tz->device->handle,
-                                "_CRT", NULL, &tz->trips.critical.temperature);
+                                "_CRT", NULL, &tmp);
+                tz->trips.critical.temperature = tmp;
                 /*
                  * Treat freezing temperatures as invalid as well; some
                  * BIOSes return really low values and cause reboots at startup.
@@ -388,10 +388,12 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
                         } else if (crt > 0) {
                                 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
                                 /*
-                                 * Allow override to lower critical threshold
+                                 * Allow override critical threshold
                                  */
-                                if (crt_k < tz->trips.critical.temperature)
-                                        tz->trips.critical.temperature = crt_k;
+                                if (crt_k > tz->trips.critical.temperature)
+                                        printk(KERN_WARNING PREFIX
+                                                "Critical threshold %d C\n", crt);
+                                tz->trips.critical.temperature = crt_k;
                         }
                 }
         }
@@ -399,12 +401,13 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
         /* Critical Sleep (optional) */
         if (flag & ACPI_TRIPS_HOT) {
                 status = acpi_evaluate_integer(tz->device->handle,
-                                "_HOT", NULL, &tz->trips.hot.temperature);
+                                "_HOT", NULL, &tmp);
                 if (ACPI_FAILURE(status)) {
                         tz->trips.hot.flags.valid = 0;
                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                         "No hot threshold\n"));
                 } else {
+                        tz->trips.hot.temperature = tmp;
                         tz->trips.hot.flags.valid = 1;
                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                         "Found hot threshold [%lu]\n",
@@ -418,33 +421,40 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
                 if (psv == -1) {
                         status = AE_SUPPORT;
                 } else if (psv > 0) {
-                        tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
+                        tmp = CELSIUS_TO_KELVIN(psv);
                         status = AE_OK;
                 } else {
                         status = acpi_evaluate_integer(tz->device->handle,
-                                "_PSV", NULL, &tz->trips.passive.temperature);
+                                "_PSV", NULL, &tmp);
                 }
 
                 if (ACPI_FAILURE(status))
                         tz->trips.passive.flags.valid = 0;
                 else {
+                        tz->trips.passive.temperature = tmp;
                         tz->trips.passive.flags.valid = 1;
                         if (flag == ACPI_TRIPS_INIT) {
                                 status = acpi_evaluate_integer(
                                                 tz->device->handle, "_TC1",
-                                                NULL, &tz->trips.passive.tc1);
+                                                NULL, &tmp);
                                 if (ACPI_FAILURE(status))
                                         tz->trips.passive.flags.valid = 0;
+                                else
+                                        tz->trips.passive.tc1 = tmp;
                                 status = acpi_evaluate_integer(
                                                 tz->device->handle, "_TC2",
-                                                NULL, &tz->trips.passive.tc2);
+                                                NULL, &tmp);
                                 if (ACPI_FAILURE(status))
                                         tz->trips.passive.flags.valid = 0;
+                                else
+                                        tz->trips.passive.tc2 = tmp;
                                 status = acpi_evaluate_integer(
                                                 tz->device->handle, "_TSP",
-                                                NULL, &tz->trips.passive.tsp);
+                                                NULL, &tmp);
                                 if (ACPI_FAILURE(status))
                                         tz->trips.passive.flags.valid = 0;
+                                else
+                                        tz->trips.passive.tsp = tmp;
                         }
                 }
         }
@@ -479,7 +489,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 
                 if (flag & ACPI_TRIPS_ACTIVE) {
                         status = acpi_evaluate_integer(tz->device->handle,
-                                name, NULL, &tz->trips.active[i].temperature);
+                                                        name, NULL, &tmp);
                         if (ACPI_FAILURE(status)) {
                                 tz->trips.active[i].flags.valid = 0;
                                 if (i == 0)
@@ -500,8 +510,10 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
                                                 tz->trips.active[i - 2].temperature :
                                                 CELSIUS_TO_KELVIN(act));
                                 break;
-                        } else
+                        } else {
+                                tz->trips.active[i].temperature = tmp;
                                 tz->trips.active[i].flags.valid = 1;
+                        }
                 }
 
                 name[2] = 'L';
@@ -563,7 +575,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
         acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
                                 tz->trips.critical.flags.enabled);
         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
-                                          tz->device->dev.bus_id,
+                                          dev_name(&tz->device->dev),
                                           ACPI_THERMAL_NOTIFY_CRITICAL,
                                           tz->trips.critical.flags.enabled);
 
@@ -592,7 +604,7 @@ static int acpi_thermal_hot(struct acpi_thermal *tz)
         acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
                                 tz->trips.hot.flags.enabled);
         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
-                                          tz->device->dev.bus_id,
+                                          dev_name(&tz->device->dev),
                                           ACPI_THERMAL_NOTIFY_HOT,
                                           tz->trips.hot.flags.enabled);
 
@@ -1213,8 +1225,8 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
                                   acpi_bus_private_data_handler,
                                   tz->thermal_zone);
         if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                "Error attaching device data\n"));
+                printk(KERN_ERR PREFIX
+                                "Error attaching device data\n");
                 return -ENODEV;
         }
 
@@ -1579,14 +1591,14 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
                 acpi_thermal_check(tz);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event, 0);
+                                                  dev_name(&device->dev), event, 0);
                 break;
         case ACPI_THERMAL_NOTIFY_DEVICES:
                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
                 acpi_thermal_check(tz);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
-                                                  device->dev.bus_id, event, 0);
+                                                  dev_name(&device->dev), event, 0);
                 break;
         default:
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -1647,7 +1659,7 @@ static int acpi_thermal_add(struct acpi_device *device)
         strcpy(tz->name, device->pnp.bus_id);
         strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
-        acpi_driver_data(device) = tz;
+        device->driver_data = tz;
         mutex_init(&tz->lock);
 
 
diff --git a/drivers/acpi/toshiba_acpi.c b/drivers/acpi/toshiba_acpi.c
index 8a649f40d162..40e60fc2e596 100644
--- a/drivers/acpi/toshiba_acpi.c
+++ b/drivers/acpi/toshiba_acpi.c
@@ -371,6 +371,7 @@ static void bt_poll_rfkill(struct input_polled_dev *poll_dev)
                                    RFKILL_STATE_HARD_BLOCKED);
                 input_report_switch(poll_dev->input, SW_RFKILL_ALL,
                                     new_rfk_state);
+                input_sync(poll_dev->input);
         }
 }
 
@@ -548,7 +549,7 @@ static unsigned long write_video(const char *buffer, unsigned long count)
 
         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
         if (hci_result == HCI_SUCCESS) {
-                int new_video_out = video_out;
+                unsigned int new_video_out = video_out;
                 if (lcd_out != -1)
                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
                 if (crt_out != -1)
@@ -823,33 +824,36 @@ static int __init toshiba_acpi_init(void)
                         toshiba_acpi_exit();
                         return -ENOMEM;
                 }
-        }
 
-        /* Register input device for kill switch */
-        toshiba_acpi.poll_dev = input_allocate_polled_device();
-        if (!toshiba_acpi.poll_dev) {
-                printk(MY_ERR "unable to allocate kill-switch input device\n");
-                toshiba_acpi_exit();
-                return -ENOMEM;
-        }
-        toshiba_acpi.poll_dev->private = &toshiba_acpi;
-        toshiba_acpi.poll_dev->poll = bt_poll_rfkill;
-        toshiba_acpi.poll_dev->poll_interval = 1000; /* msecs */
-
-        toshiba_acpi.poll_dev->input->name = toshiba_acpi.rfk_name;
-        toshiba_acpi.poll_dev->input->id.bustype = BUS_HOST;
-        toshiba_acpi.poll_dev->input->id.vendor = 0x0930; /* Toshiba USB ID */
-        set_bit(EV_SW, toshiba_acpi.poll_dev->input->evbit);
-        set_bit(SW_RFKILL_ALL, toshiba_acpi.poll_dev->input->swbit);
-        input_report_switch(toshiba_acpi.poll_dev->input, SW_RFKILL_ALL, TRUE);
-
-        ret = input_register_polled_device(toshiba_acpi.poll_dev);
-        if (ret) {
-                printk(MY_ERR "unable to register kill-switch input device\n");
-                rfkill_free(toshiba_acpi.rfk_dev);
-                toshiba_acpi.rfk_dev = NULL;
-                toshiba_acpi_exit();
-                return ret;
+                /* Register input device for kill switch */
+                toshiba_acpi.poll_dev = input_allocate_polled_device();
+                if (!toshiba_acpi.poll_dev) {
+                        printk(MY_ERR
+                               "unable to allocate kill-switch input device\n");
+                        toshiba_acpi_exit();
+                        return -ENOMEM;
+                }
+                toshiba_acpi.poll_dev->private = &toshiba_acpi;
+                toshiba_acpi.poll_dev->poll = bt_poll_rfkill;
+                toshiba_acpi.poll_dev->poll_interval = 1000; /* msecs */
+
+                toshiba_acpi.poll_dev->input->name = toshiba_acpi.rfk_name;
+                toshiba_acpi.poll_dev->input->id.bustype = BUS_HOST;
+                /* Toshiba USB ID */
+                toshiba_acpi.poll_dev->input->id.vendor = 0x0930;
+                set_bit(EV_SW, toshiba_acpi.poll_dev->input->evbit);
+                set_bit(SW_RFKILL_ALL, toshiba_acpi.poll_dev->input->swbit);
+                input_report_switch(toshiba_acpi.poll_dev->input,
+                                    SW_RFKILL_ALL, TRUE);
+                input_sync(toshiba_acpi.poll_dev->input);
+
+                ret = input_register_polled_device(toshiba_acpi.poll_dev);
+                if (ret) {
+                        printk(MY_ERR
+                               "unable to register kill-switch input device\n");
+                        toshiba_acpi_exit();
+                        return ret;
+                }
         }
 
         return 0;
diff --git a/drivers/acpi/utilities/utalloc.c b/drivers/acpi/utilities/utalloc.c
index 7dcb67e0b215..241c535c1753 100644
--- a/drivers/acpi/utilities/utalloc.c
+++ b/drivers/acpi/utilities/utalloc.c
@@ -232,7 +232,7 @@ acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer)
  * RETURN:      Status
  *
  * DESCRIPTION: Validate that the buffer is of the required length or
- *              allocate a new buffer.  Returned buffer is always zeroed.
+ *              allocate a new buffer. Returned buffer is always zeroed.
  *
  ******************************************************************************/
 
@@ -240,7 +240,7 @@ acpi_status
 acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
                           acpi_size required_length)
 {
-        acpi_status status = AE_OK;
+        acpi_size input_buffer_length;
 
         /* Parameter validation */
 
@@ -248,55 +248,58 @@ acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
                 return (AE_BAD_PARAMETER);
         }
 
-        switch (buffer->length) {
+        /*
+         * Buffer->Length is used as both an input and output parameter. Get the
+         * input actual length and set the output required buffer length.
+         */
+        input_buffer_length = buffer->length;
+        buffer->length = required_length;
+
+        /*
+         * The input buffer length contains the actual buffer length, or the type
+         * of buffer to be allocated by this routine.
+         */
+        switch (input_buffer_length) {
         case ACPI_NO_BUFFER:
 
-                /* Set the exception and returned the required length */
+                /* Return the exception (and the required buffer length) */
 
-                status = AE_BUFFER_OVERFLOW;
-                break;
+                return (AE_BUFFER_OVERFLOW);
 
         case ACPI_ALLOCATE_BUFFER:
 
                 /* Allocate a new buffer */
 
                 buffer->pointer = acpi_os_allocate(required_length);
-                if (!buffer->pointer) {
-                        return (AE_NO_MEMORY);
-                }
-
-                /* Clear the buffer */
-
-                ACPI_MEMSET(buffer->pointer, 0, required_length);
                 break;
 
         case ACPI_ALLOCATE_LOCAL_BUFFER:
 
                 /* Allocate a new buffer with local interface to allow tracking */
 
-                buffer->pointer = ACPI_ALLOCATE_ZEROED(required_length);
-                if (!buffer->pointer) {
-                        return (AE_NO_MEMORY);
-                }
+                buffer->pointer = ACPI_ALLOCATE(required_length);
                 break;
 
         default:
 
                 /* Existing buffer: Validate the size of the buffer */
 
-                if (buffer->length < required_length) {
-                        status = AE_BUFFER_OVERFLOW;
-                        break;
+                if (input_buffer_length < required_length) {
+                        return (AE_BUFFER_OVERFLOW);
                 }
+                break;
+        }
 
-                /* Clear the buffer */
+        /* Validate allocation from above or input buffer pointer */
 
-                ACPI_MEMSET(buffer->pointer, 0, required_length);
-                break;
+        if (!buffer->pointer) {
+                return (AE_NO_MEMORY);
         }
 
-        buffer->length = required_length;
-        return (status);
+        /* Have a valid buffer, clear it */
+
+        ACPI_MEMSET(buffer->pointer, 0, required_length);
+        return (AE_OK);
 }
 
 #ifdef NOT_USED_BY_LINUX
diff --git a/drivers/acpi/utilities/utcopy.c b/drivers/acpi/utilities/utcopy.c
index 53499ac90988..5b2f7c27b705 100644
--- a/drivers/acpi/utilities/utcopy.c
+++ b/drivers/acpi/utilities/utcopy.c
@@ -42,7 +42,6 @@
  */
 
 #include <acpi/acpi.h>
-#include <acpi/amlcode.h>
 #include <acpi/acnamesp.h>
 
 
@@ -176,20 +175,24 @@ acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object,
 
                 /* This is an object reference. */
 
-                switch (internal_object->reference.opcode) {
-                case AML_INT_NAMEPATH_OP:
-
-                        /* For namepath, return the object handle ("reference") */
-
-                default:
-
-                        /* We are referring to the namespace node */
+                switch (internal_object->reference.class) {
+                case ACPI_REFCLASS_NAME:
 
+                        /*
+                         * For namepath, return the object handle ("reference")
+                         * We are referring to the namespace node
+                         */
                         external_object->reference.handle =
                             internal_object->reference.node;
                         external_object->reference.actual_type =
                             acpi_ns_get_type(internal_object->reference.node);
                         break;
+
+                default:
+
+                        /* All other reference types are unsupported */
+
+                        return_ACPI_STATUS(AE_TYPE);
                 }
                 break;
 
@@ -533,7 +536,7 @@ acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object,
 
                 /* TBD: should validate incoming handle */
 
-                internal_object->reference.opcode = AML_INT_NAMEPATH_OP;
+                internal_object->reference.class = ACPI_REFCLASS_NAME;
                 internal_object->reference.node =
                     external_object->reference.handle;
                 break;
@@ -743,11 +746,11 @@ acpi_ut_copy_simple_object(union acpi_operand_object *source_desc,
                  * We copied the reference object, so we now must add a reference
                  * to the object pointed to by the reference
                  *
-                 * DDBHandle reference (from Load/load_table is a special reference,
-                 * it's Reference.Object is the table index, so does not need to
+                 * DDBHandle reference (from Load/load_table) is a special reference,
+                 * it does not have a Reference.Object, so does not need to
                  * increase the reference count
                  */
-                if (source_desc->reference.opcode == AML_LOAD_OP) {
+                if (source_desc->reference.class == ACPI_REFCLASS_TABLE) {
                         break;
                 }
 
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c
index 42609d3a8aa9..d197c6b29e17 100644
--- a/drivers/acpi/utilities/utdelete.c
+++ b/drivers/acpi/utilities/utdelete.c
@@ -45,7 +45,6 @@
 #include <acpi/acinterp.h>
 #include <acpi/acnamesp.h>
 #include <acpi/acevents.h>
-#include <acpi/amlcode.h>
 
 #define _COMPONENT          ACPI_UTILITIES
 ACPI_MODULE_NAME("utdelete")
@@ -548,8 +547,8 @@ acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
                          * reference must track changes to the ref count of the index or
                          * target object.
                          */
-                        if ((object->reference.opcode == AML_INDEX_OP) ||
-                            (object->reference.opcode == AML_INT_NAMEPATH_OP)) {
+                        if ((object->reference.class == ACPI_REFCLASS_INDEX) ||
+                            (object->reference.class == ACPI_REFCLASS_NAME)) {
                                 next_object = object->reference.object;
                         }
                         break;
@@ -586,6 +585,13 @@ acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
         ACPI_EXCEPTION((AE_INFO, status,
                         "Could not update object reference count"));
 
+        /* Free any stacked Update State objects */
+
+        while (state_list) {
+                state = acpi_ut_pop_generic_state(&state_list);
+                acpi_ut_delete_generic_state(state);
+        }
+
         return_ACPI_STATUS(status);
 }
 
diff --git a/drivers/acpi/utilities/utglobal.c b/drivers/acpi/utilities/utglobal.c
index a6e71b801d2d..670551b95e56 100644
--- a/drivers/acpi/utilities/utglobal.c
+++ b/drivers/acpi/utilities/utglobal.c
@@ -281,7 +281,6 @@ struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
         /* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
                                                 ACPI_BITPOSITION_RT_CLOCK_ENABLE,
                                                 ACPI_BITMASK_RT_CLOCK_ENABLE},
-        /* ACPI_BITREG_WAKE_ENABLE          */ {ACPI_REGISTER_PM1_ENABLE, 0, 0},
         /* ACPI_BITREG_PCIEXP_WAKE_DISABLE  */ {ACPI_REGISTER_PM1_ENABLE,
                                                 ACPI_BITPOSITION_PCIEXP_WAKE_DISABLE,
                                                 ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
@@ -575,6 +574,47 @@ char *acpi_ut_get_descriptor_name(void *object)
 
 }
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_reference_name
+ *
+ * PARAMETERS:  Object               - An ACPI reference object
+ *
+ * RETURN:      Pointer to a string
+ *
+ * DESCRIPTION: Decode a reference object sub-type to a string.
+ *
+ ******************************************************************************/
+
+/* Printable names of reference object sub-types */
+
+static const char *acpi_gbl_ref_class_names[] = {
+        /* 00 */ "Local",
+        /* 01 */ "Argument",
+        /* 02 */ "RefOf",
+        /* 03 */ "Index",
+        /* 04 */ "DdbHandle",
+        /* 05 */ "Named Object",
+        /* 06 */ "Debug"
+};
+
+const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
+{
+        if (!object)
+                return "NULL Object";
+
+        if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND)
+                return "Not an Operand object";
+
+        if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE)
+                return "Not a Reference object";
+
+        if (object->reference.class > ACPI_REFCLASS_MAX)
+                return "Unknown Reference class";
+
+        return acpi_gbl_ref_class_names[object->reference.class];
+}
+
 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 /*
  * Strings and procedures used for debug only
@@ -677,14 +717,14 @@ u8 acpi_ut_valid_object_type(acpi_object_type type)
  *
  * PARAMETERS:  None
  *
- * RETURN:      None
+ * RETURN:      Status
  *
  * DESCRIPTION: Init library globals.  All globals that require specific
  *              initialization should be initialized here!
  *
  ******************************************************************************/
 
-void acpi_ut_init_globals(void)
+acpi_status acpi_ut_init_globals(void)
 {
         acpi_status status;
         u32 i;
@@ -695,7 +735,7 @@ void acpi_ut_init_globals(void)
 
         status = acpi_ut_create_caches();
         if (ACPI_FAILURE(status)) {
-                return;
+                return_ACPI_STATUS(status);
         }
 
         /* Mutex locked flags */
@@ -772,8 +812,8 @@ void acpi_ut_init_globals(void)
         acpi_gbl_display_final_mem_stats = FALSE;
 #endif
 
-        return_VOID;
+        return_ACPI_STATUS(AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
-    ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
+ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index f34be6773556..9089a158a874 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -995,6 +995,15 @@ acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
                                                          state->pkg.
                                                          this_target_obj, 0);
                         if (!state) {
+
+                                /* Free any stacked Update State objects */
+
+                                while (state_list) {
+                                        state =
+                                            acpi_ut_pop_generic_state
+                                            (&state_list);
+                                        acpi_ut_delete_generic_state(state);
+                                }
                                 return_ACPI_STATUS(AE_NO_MEMORY);
                         }
                 }
diff --git a/drivers/acpi/utilities/utobject.c b/drivers/acpi/utilities/utobject.c
index 916eff399eb3..c354e7a42bcd 100644
--- a/drivers/acpi/utilities/utobject.c
+++ b/drivers/acpi/utilities/utobject.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acnamesp.h>
-#include <acpi/amlcode.h>
 
 #define _COMPONENT          ACPI_UTILITIES
 ACPI_MODULE_NAME("utobject")
@@ -478,8 +477,8 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 
         case ACPI_TYPE_LOCAL_REFERENCE:
 
-                switch (internal_object->reference.opcode) {
-                case AML_INT_NAMEPATH_OP:
+                switch (internal_object->reference.class) {
+                case ACPI_REFCLASS_NAME:
 
                         /*
                          * Get the actual length of the full pathname to this object.
@@ -503,8 +502,10 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
                          * required eventually.
                          */
                         ACPI_ERROR((AE_INFO,
-                                    "Unsupported Reference opcode=%X in object %p",
-                                    internal_object->reference.opcode,
+                                    "Cannot convert to external object - "
+                                    "unsupported Reference Class [%s] %X in object %p",
+                                    acpi_ut_get_reference_name(internal_object),
+                                    internal_object->reference.class,
                                     internal_object));
                         status = AE_TYPE;
                         break;
@@ -513,7 +514,9 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 
         default:
 
-                ACPI_ERROR((AE_INFO, "Unsupported type=%X in object %p",
+                ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
+                            "unsupported type [%s] %X in object %p",
+                            acpi_ut_get_object_type_name(internal_object),
                             ACPI_GET_OBJECT_TYPE(internal_object),
                             internal_object));
                 status = AE_TYPE;
diff --git a/drivers/acpi/utilities/utxface.c b/drivers/acpi/utilities/utxface.c
index f8bdadf3c32f..c198a4d40583 100644
--- a/drivers/acpi/utilities/utxface.c
+++ b/drivers/acpi/utilities/utxface.c
@@ -81,7 +81,12 @@ acpi_status __init acpi_initialize_subsystem(void)
 
         /* Initialize all globals used by the subsystem */
 
-        acpi_ut_init_globals();
+        status = acpi_ut_init_globals();
+        if (ACPI_FAILURE(status)) {
+                ACPI_EXCEPTION((AE_INFO, status,
+                                "During initialization of globals"));
+                return_ACPI_STATUS(status);
+        }
 
         /* Create the default mutex objects */
 
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 100926143818..f844941089bb 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -256,39 +256,31 @@ EXPORT_SYMBOL(acpi_extract_package);
 acpi_status
 acpi_evaluate_integer(acpi_handle handle,
                       acpi_string pathname,
-                      struct acpi_object_list *arguments, unsigned long *data)
+                      struct acpi_object_list *arguments, unsigned long long *data)
 {
         acpi_status status = AE_OK;
-        union acpi_object *element;
+        union acpi_object element;
         struct acpi_buffer buffer = { 0, NULL };
 
-
         if (!data)
                 return AE_BAD_PARAMETER;
 
-        element = kzalloc(sizeof(union acpi_object), irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
-        if (!element)
-                return AE_NO_MEMORY;
-
         buffer.length = sizeof(union acpi_object);
-        buffer.pointer = element;
+        buffer.pointer = &element;
         status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
         if (ACPI_FAILURE(status)) {
                 acpi_util_eval_error(handle, pathname, status);
-                kfree(element);
                 return status;
         }
 
-        if (element->type != ACPI_TYPE_INTEGER) {
+        if (element.type != ACPI_TYPE_INTEGER) {
                 acpi_util_eval_error(handle, pathname, AE_BAD_DATA);
-                kfree(element);
                 return AE_BAD_DATA;
         }
 
-        *data = element->integer.value;
-        kfree(element);
+        *data = element.integer.value;
 
-        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%lu]\n", *data));
+        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%llu]\n", *data));
 
         return AE_OK;
 }
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index e8a51a1700f7..baa441929720 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -41,7 +41,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_VIDEO_COMPONENT            0x08000000
 #define ACPI_VIDEO_CLASS                "video"
 #define ACPI_VIDEO_BUS_NAME             "Video Bus"
 #define ACPI_VIDEO_DEVICE_NAME          "Video Device"
@@ -291,20 +290,20 @@ static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
                         int level);
 static int acpi_video_device_lcd_get_level_current(
                         struct acpi_video_device *device,
-                        unsigned long *level);
+                        unsigned long long *level);
 static int acpi_video_get_next_level(struct acpi_video_device *device,
                                      u32 level_current, u32 event);
 static void acpi_video_switch_brightness(struct acpi_video_device *device,
                                          int event);
 static int acpi_video_device_get_state(struct acpi_video_device *device,
-                            unsigned long *state);
+                            unsigned long long *state);
 static int acpi_video_output_get(struct output_device *od);
 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 
 /*backlight device sysfs support*/
 static int acpi_video_get_brightness(struct backlight_device *bd)
 {
-        unsigned long cur_level;
+        unsigned long long cur_level;
         int i;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)bl_get_data(bd);
@@ -336,7 +335,7 @@ static struct backlight_ops acpi_backlight_ops = {
 /*video output device sysfs support*/
 static int acpi_video_output_get(struct output_device *od)
 {
-        unsigned long state;
+        unsigned long long state;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
         acpi_video_device_get_state(vd, &state);
@@ -370,7 +369,7 @@ static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
 {
         struct acpi_device *device = cdev->devdata;
         struct acpi_video_device *video = acpi_driver_data(device);
-        unsigned long level;
+        unsigned long long level;
         int state;
 
         acpi_video_device_lcd_get_level_current(video, &level);
@@ -410,7 +409,7 @@ static struct thermal_cooling_device_ops video_cooling_ops = {
 /* device */
 
 static int
-acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
+acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
 {
         int status;
 
@@ -421,7 +420,7 @@ acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
 
 static int
 acpi_video_device_get_state(struct acpi_video_device *device,
-                            unsigned long *state)
+                            unsigned long long *state)
 {
         int status;
 
@@ -436,7 +435,7 @@ acpi_video_device_set_state(struct acpi_video_device *device, int state)
         int status;
         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
         struct acpi_object_list args = { 1, &arg0 };
-        unsigned long ret;
+        unsigned long long ret;
 
 
         arg0.integer.value = state;
@@ -495,7 +494,7 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 
 static int
 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
-                                        unsigned long *level)
+                                        unsigned long long *level)
 {
         if (device->cap._BQC)
                 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
@@ -549,7 +548,7 @@ static int
 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
 {
         int status;
-        unsigned long tmp;
+        unsigned long long tmp;
         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
         struct acpi_object_list args = { 1, &arg0 };
 
@@ -564,7 +563,7 @@ acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
 }
 
 static int
-acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
+acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
 {
         int status;
 
@@ -575,7 +574,7 @@ acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
 
 static int
 acpi_video_bus_POST_options(struct acpi_video_bus *video,
-                            unsigned long *options)
+                            unsigned long long *options)
 {
         int status;
 
@@ -739,7 +738,8 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                 device->cap._DSS = 1;
         }
 
-        max_level = acpi_video_init_brightness(device);
+        if (acpi_video_backlight_support())
+                max_level = acpi_video_init_brightness(device);
 
         if (device->cap._BCL && device->cap._BCM && max_level > 0) {
                 int result;
@@ -785,18 +785,21 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 
         }
-        if (device->cap._DCS && device->cap._DSS){
-                static int count = 0;
-                char *name;
-                name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
-                if (!name)
-                        return;
-                sprintf(name, "acpi_video%d", count++);
-                device->output_dev = video_output_register(name,
-                                NULL, device, &acpi_output_properties);
-                kfree(name);
+
+        if (acpi_video_display_switch_support()) {
+
+                if (device->cap._DCS && device->cap._DSS) {
+                        static int count;
+                        char *name;
+                        name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+                        if (!name)
+                                return;
+                        sprintf(name, "acpi_video%d", count++);
+                        device->output_dev = video_output_register(name,
+                                        NULL, device, &acpi_output_properties);
+                        kfree(name);
+                }
         }
-        return;
 }
 
 /*
@@ -842,11 +845,16 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 static int acpi_video_bus_check(struct acpi_video_bus *video)
 {
         acpi_status status = -ENOENT;
-
+        struct device *dev;
 
         if (!video)
                 return -EINVAL;
 
+        dev = acpi_get_physical_pci_device(video->device->handle);
+        if (!dev)
+                return -ENODEV;
+        put_device(dev);
+
         /* Since there is no HID, CID and so on for VGA driver, we have
          * to check well known required nodes.
          */
@@ -918,7 +926,7 @@ static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 {
         int status;
         struct acpi_video_device *dev = seq->private;
-        unsigned long state;
+        unsigned long long state;
 
 
         if (!dev)
@@ -927,14 +935,14 @@ static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
         status = acpi_video_device_get_state(dev, &state);
         seq_printf(seq, "state:     ");
         if (ACPI_SUCCESS(status))
-                seq_printf(seq, "0x%02lx\n", state);
+                seq_printf(seq, "0x%02llx\n", state);
         else
                 seq_printf(seq, "<not supported>\n");
 
         status = acpi_video_device_query(dev, &state);
         seq_printf(seq, "query:     ");
         if (ACPI_SUCCESS(status))
-                seq_printf(seq, "0x%02lx\n", state);
+                seq_printf(seq, "0x%02llx\n", state);
         else
                 seq_printf(seq, "<not supported>\n");
 
@@ -1217,7 +1225,7 @@ static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_video_bus *video = seq->private;
-        unsigned long options;
+        unsigned long long options;
         int status;
 
 
@@ -1232,7 +1240,7 @@ static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
                         printk(KERN_WARNING PREFIX
                                "This indicates a BIOS bug. Please contact the manufacturer.\n");
                 }
-                printk("%lx\n", options);
+                printk("%llx\n", options);
                 seq_printf(seq, "can POST: <integrated video>");
                 if (options & 2)
                         seq_printf(seq, " <PCI video>");
@@ -1256,7 +1264,7 @@ static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_video_bus *video = seq->private;
         int status;
-        unsigned long id;
+        unsigned long long id;
 
 
         if (!video)
@@ -1303,7 +1311,7 @@ acpi_video_bus_write_POST(struct file *file,
         struct seq_file *m = file->private_data;
         struct acpi_video_bus *video = m->private;
         char str[12] = { 0 };
-        unsigned long opt, options;
+        unsigned long long opt, options;
 
 
         if (!video || count + 1 > sizeof str)
@@ -1473,7 +1481,7 @@ static int
 acpi_video_bus_get_one_device(struct acpi_device *device,
                               struct acpi_video_bus *video)
 {
-        unsigned long device_id;
+        unsigned long long device_id;
         int status;
         struct acpi_video_device *data;
         struct acpi_video_device_attrib* attribute;
@@ -1491,7 +1499,7 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
 
                 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
                 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
-                acpi_driver_data(device) = data;
+                device->driver_data = data;
 
                 data->device_id = device_id;
                 data->video = video;
@@ -1530,8 +1538,8 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                                                      acpi_video_device_notify,
                                                      data);
                 if (ACPI_FAILURE(status)) {
-                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                          "Error installing notify handler\n"));
+                        printk(KERN_ERR PREFIX
+                                          "Error installing notify handler\n");
                         if(data->brightness)
                                 kfree(data->brightness->levels);
                         kfree(data->brightness);
@@ -1724,7 +1732,7 @@ acpi_video_get_next_level(struct acpi_video_device *device,
 static void
 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
 {
-        unsigned long level_current, level_next;
+        unsigned long long level_current, level_next;
         if (!device->brightness)
                 return;
         acpi_video_device_lcd_get_level_current(device, &level_current);
@@ -1745,8 +1753,8 @@ acpi_video_bus_get_devices(struct acpi_video_bus *video,
 
                 status = acpi_video_bus_get_one_device(dev, video);
                 if (ACPI_FAILURE(status)) {
-                        ACPI_DEBUG_PRINT((ACPI_DB_WARN,
-                                        "Cant attach device"));
+                        printk(KERN_WARNING PREFIX
+                                        "Cant attach device");
                         continue;
                 }
         }
@@ -1982,7 +1990,7 @@ static int acpi_video_bus_add(struct acpi_device *device)
         video->device = device;
         strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
         strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
-        acpi_driver_data(device) = video;
+        device->driver_data = video;
 
         acpi_video_bus_find_cap(video);
         error = acpi_video_bus_check(video);
@@ -2003,8 +2011,8 @@ static int acpi_video_bus_add(struct acpi_device *device)
                                              ACPI_DEVICE_NOTIFY,
                                              acpi_video_bus_notify, video);
         if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Error installing notify handler\n"));
+                printk(KERN_ERR PREFIX
+                                  "Error installing notify handler\n");
                 error = -ENODEV;
                 goto err_stop_video;
         }
@@ -2058,7 +2066,7 @@ static int acpi_video_bus_add(struct acpi_device *device)
         acpi_video_bus_remove_fs(device);
  err_free_video:
         kfree(video);
-        acpi_driver_data(device) = NULL;
+        device->driver_data = NULL;
 
         return error;
 }
@@ -2094,12 +2102,6 @@ static int __init acpi_video_init(void)
 {
         int result = 0;
 
-
-        /*
-           acpi_dbg_level = 0xFFFFFFFF;
-           acpi_dbg_layer = 0x08000000;
-         */
-
         acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
         if (!acpi_video_dir)
                 return -ENODEV;
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
new file mode 100644
index 000000000000..f022eb6f5637
--- /dev/null
+++ b/drivers/acpi/video_detect.c
@@ -0,0 +1,267 @@
+/*
+ *  Copyright (C) 2008       SuSE Linux Products GmbH
+ *                           Thomas Renninger <trenn@suse.de>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ * video_detect.c:
+ * Provides acpi_is_video_device() for early scanning of ACPI devices in scan.c
+ * There a Linux specific (Spec does not provide a HID for video devices) is
+ * assinged
+ *
+ * After PCI devices are glued with ACPI devices
+ * acpi_get_physical_pci_device() can be called to identify ACPI graphics
+ * devices for which a real graphics card is plugged in
+ *
+ * Now acpi_video_get_capabilities() can be called to check which
+ * capabilities the graphics cards plugged in support. The check for general
+ * video capabilities will be triggered by the first caller of
+ * acpi_video_get_capabilities(NULL); which will happen when the first
+ * backlight (or display output) switching supporting driver calls:
+ * acpi_video_backlight_support();
+ *
+ * Depending on whether ACPI graphics extensions (cmp. ACPI spec Appendix B)
+ * are available, video.ko should be used to handle the device.
+ *
+ * Otherwise vendor specific drivers like thinkpad_acpi, asus_acpi,
+ * sony_acpi,... can take care about backlight brightness and display output
+ * switching.
+ *
+ * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
+ * this file will not be compiled, acpi_video_get_capabilities() and
+ * acpi_video_backlight_support() will always return 0 and vendor specific
+ * drivers always can handle backlight.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+
+ACPI_MODULE_NAME("video");
+#define _COMPONENT              ACPI_VIDEO_COMPONENT
+
+static long acpi_video_support;
+static bool acpi_video_caps_checked;
+
+static acpi_status
+acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
+                          void **retyurn_value)
+{
+        long *cap = context;
+        acpi_handle h_dummy;
+
+        if (ACPI_SUCCESS(acpi_get_handle(handle, "_BCM", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(handle, "_BCL", &h_dummy))) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight "
+                                  "support\n"));
+                *cap |= ACPI_VIDEO_BACKLIGHT;
+                /* We have backlight support, no need to scan further */
+                return AE_CTRL_TERMINATE;
+        }
+        return 0;
+}
+
+/* Returns true if the device is a video device which can be handled by
+ * video.ko.
+ * The device will get a Linux specific CID added in scan.c to
+ * identify the device as an ACPI graphics device
+ * Be aware that the graphics device may not be physically present
+ * Use acpi_video_get_capabilities() to detect general ACPI video
+ * capabilities of present cards
+ */
+long acpi_is_video_device(struct acpi_device *device)
+{
+        acpi_handle h_dummy;
+        long video_caps = 0;
+
+        if (!device)
+                return 0;
+
+        /* Does this device able to support video switching ? */
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy)))
+                video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;
+
+        /* Does this device able to retrieve a video ROM ? */
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy)))
+                video_caps |= ACPI_VIDEO_ROM_AVAILABLE;
+
+        /* Does this device able to configure which video head to be POSTed ? */
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy)))
+                video_caps |= ACPI_VIDEO_DEVICE_POSTING;
+
+        /* Only check for backlight functionality if one of the above hit. */
+        if (video_caps)
+                acpi_walk_namespace(ACPI_TYPE_DEVICE, device->handle,
+                                    ACPI_UINT32_MAX, acpi_backlight_cap_match,
+                                    &video_caps, NULL);
+
+        return video_caps;
+}
+EXPORT_SYMBOL(acpi_is_video_device);
+
+static acpi_status
+find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+        long *cap = context;
+        struct device *dev;
+        struct acpi_device *acpi_dev;
+
+        const struct acpi_device_id video_ids[] = {
+                {ACPI_VIDEO_HID, 0},
+                {"", 0},
+        };
+        if (acpi_bus_get_device(handle, &acpi_dev))
+                return AE_OK;
+
+        if (!acpi_match_device_ids(acpi_dev, video_ids)) {
+                dev = acpi_get_physical_pci_device(handle);
+                if (!dev)
+                        return AE_OK;
+                put_device(dev);
+                *cap |= acpi_is_video_device(acpi_dev);
+        }
+        return AE_OK;
+}
+
+/*
+ * Returns the video capabilities of a specific ACPI graphics device
+ *
+ * if NULL is passed as argument all ACPI devices are enumerated and
+ * all graphics capabilities of physically present devices are
+ * summerized and returned. This is cached and done only once.
+ */
+long acpi_video_get_capabilities(acpi_handle graphics_handle)
+{
+        long caps = 0;
+        struct acpi_device *tmp_dev;
+        acpi_status status;
+
+        if (acpi_video_caps_checked && graphics_handle == NULL)
+                return acpi_video_support;
+
+        if (!graphics_handle) {
+                /* Only do the global walk through all graphics devices once */
+                acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+                                    ACPI_UINT32_MAX, find_video,
+                                    &caps, NULL);
+                /* There might be boot param flags set already... */
+                acpi_video_support |= caps;
+                acpi_video_caps_checked = 1;
+                /* Add blacklists here. Be careful to use the right *DMI* bits
+                 * to still be able to override logic via boot params, e.g.:
+                 *
+                 *   if (dmi_name_in_vendors("XY")) {
+                 *      acpi_video_support |=
+                 *              ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VENDOR;
+                 *      acpi_video_support |=
+                 *              ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
+                 *}
+                 */
+        } else {
+                status = acpi_bus_get_device(graphics_handle, &tmp_dev);
+                if (ACPI_FAILURE(status)) {
+                        ACPI_EXCEPTION((AE_INFO, status, "Invalid device"));
+                        return 0;
+                }
+                acpi_walk_namespace(ACPI_TYPE_DEVICE, graphics_handle,
+                                    ACPI_UINT32_MAX, find_video,
+                                    &caps, NULL);
+        }
+        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "We have 0x%lX video support %s %s\n",
+                          graphics_handle ? caps : acpi_video_support,
+                          graphics_handle ? "on device " : "in general",
+                          graphics_handle ? acpi_device_bid(tmp_dev) : ""));
+        return caps;
+}
+EXPORT_SYMBOL(acpi_video_get_capabilities);
+
+/* Returns true if video.ko can do backlight switching */
+int acpi_video_backlight_support(void)
+{
+        /*
+         * We must check whether the ACPI graphics device is physically plugged
+         * in. Therefore this must be called after binding PCI and ACPI devices
+         */
+        if (!acpi_video_caps_checked)
+                acpi_video_get_capabilities(NULL);
+
+        /* First check for boot param -> highest prio */
+        if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR)
+                return 0;
+        else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO)
+                return 1;
+
+        /* Then check for DMI blacklist -> second highest prio */
+        if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VENDOR)
+                return 0;
+        else if (acpi_video_support & ACPI_VIDEO_BACKLIGHT_DMI_VIDEO)
+                return 1;
+
+        /* Then go the default way */
+        return acpi_video_support & ACPI_VIDEO_BACKLIGHT;
+}
+EXPORT_SYMBOL(acpi_video_backlight_support);
+
+/*
+ * Returns true if video.ko can do display output switching.
+ * This does not work well/at all with binary graphics drivers
+ * which disable system io ranges and do it on their own.
+ */
+int acpi_video_display_switch_support(void)
+{
+        if (!acpi_video_caps_checked)
+                acpi_video_get_capabilities(NULL);
+
+        if (acpi_video_support & ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VENDOR)
+                return 0;
+        else if (acpi_video_support & ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO)
+                return 1;
+
+        if (acpi_video_support & ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VENDOR)
+                return 0;
+        else if (acpi_video_support & ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VIDEO)
+                return 1;
+
+        return acpi_video_support & ACPI_VIDEO_OUTPUT_SWITCHING;
+}
+EXPORT_SYMBOL(acpi_video_display_switch_support);
+
+/*
+ * Use acpi_display_output=vendor/video or acpi_backlight=vendor/video
+ * To force that backlight or display output switching is processed by vendor
+ * specific acpi drivers or video.ko driver.
+ */
+int __init acpi_backlight(char *str)
+{
+        if (str == NULL || *str == '\0')
+                return 1;
+        else {
+                if (!strcmp("vendor", str))
+                        acpi_video_support |=
+                                ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR;
+                if (!strcmp("video", str))
+                        acpi_video_support |=
+                                ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO;
+        }
+        return 1;
+}
+__setup("acpi_backlight=", acpi_backlight);
+
+int __init acpi_display_output(char *str)
+{
+        if (str == NULL || *str == '\0')
+                return 1;
+        else {
+                if (!strcmp("vendor", str))
+                        acpi_video_support |=
+                                ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VENDOR;
+                if (!strcmp("video", str))
+                        acpi_video_support |=
+                                ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO;
+        }
+        return 1;
+}
+__setup("acpi_display_output=", acpi_display_output);
diff --git a/drivers/acpi/wmi.c b/drivers/acpi/wmi.c
index cfe2c833474d..8a8b377712c9 100644
--- a/drivers/acpi/wmi.c
+++ b/drivers/acpi/wmi.c
@@ -217,6 +217,35 @@ static bool find_guid(const char *guid_string, struct wmi_block **out)
         return 0;
 }
 
+static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
+{
+        struct guid_block *block = NULL;
+        char method[5];
+        struct acpi_object_list input;
+        union acpi_object params[1];
+        acpi_status status;
+        acpi_handle handle;
+
+        block = &wblock->gblock;
+        handle = wblock->handle;
+
+        if (!block)
+                return AE_NOT_EXIST;
+
+        input.count = 1;
+        input.pointer = params;
+        params[0].type = ACPI_TYPE_INTEGER;
+        params[0].integer.value = enable;
+
+        snprintf(method, 5, "WE%02X", block->notify_id);
+        status = acpi_evaluate_object(handle, method, &input, NULL);
+
+        if (status != AE_OK && status != AE_NOT_FOUND)
+                return status;
+        else
+                return AE_OK;
+}
+
 /*
  * Exported WMI functions
  */
@@ -242,7 +271,7 @@ u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
         char method[4] = "WM";
 
         if (!find_guid(guid_string, &wblock))
-                return AE_BAD_ADDRESS;
+                return AE_ERROR;
 
         block = &wblock->gblock;
         handle = wblock->handle;
@@ -304,7 +333,7 @@ struct acpi_buffer *out)
                 return AE_BAD_PARAMETER;
 
         if (!find_guid(guid_string, &wblock))
-                return AE_BAD_ADDRESS;
+                return AE_ERROR;
 
         block = &wblock->gblock;
         handle = wblock->handle;
@@ -314,7 +343,7 @@ struct acpi_buffer *out)
 
         /* Check GUID is a data block */
         if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
-                return AE_BAD_ADDRESS;
+                return AE_ERROR;
 
         input.count = 1;
         input.pointer = wq_params;
@@ -385,7 +414,7 @@ const struct acpi_buffer *in)
                 return AE_BAD_DATA;
 
         if (!find_guid(guid_string, &wblock))
-                return AE_BAD_ADDRESS;
+                return AE_ERROR;
 
         block = &wblock->gblock;
         handle = wblock->handle;
@@ -395,7 +424,7 @@ const struct acpi_buffer *in)
 
         /* Check GUID is a data block */
         if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
-                return AE_BAD_ADDRESS;
+                return AE_ERROR;
 
         input.count = 2;
         input.pointer = params;
@@ -427,6 +456,7 @@ acpi_status wmi_install_notify_handler(const char *guid,
 wmi_notify_handler handler, void *data)
 {
         struct wmi_block *block;
+        acpi_status status;
 
         if (!guid || !handler)
                 return AE_BAD_PARAMETER;
@@ -441,7 +471,9 @@ wmi_notify_handler handler, void *data)
         block->handler = handler;
         block->handler_data = data;
 
-        return AE_OK;
+        status = wmi_method_enable(block, 1);
+
+        return status;
 }
 EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
 
@@ -453,6 +485,7 @@ EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
 acpi_status wmi_remove_notify_handler(const char *guid)
 {
         struct wmi_block *block;
+        acpi_status status;
 
         if (!guid)
                 return AE_BAD_PARAMETER;
@@ -464,10 +497,12 @@ acpi_status wmi_remove_notify_handler(const char *guid)
         if (!block->handler)
                 return AE_NULL_ENTRY;
 
+        status = wmi_method_enable(block, 0);
+
         block->handler = NULL;
         block->handler_data = NULL;
 
-        return AE_OK;
+        return status;
 }
 EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
 
@@ -625,7 +660,7 @@ static void acpi_wmi_notify(acpi_handle handle, u32 event, void *data)
                                 wblock->handler(event, wblock->handler_data);
 
                         acpi_bus_generate_netlink_event(
-                                device->pnp.device_class, device->dev.bus_id,
+                                device->pnp.device_class, dev_name(&device->dev),
                                 event, 0);
                         break;
                 }