19 files changed, 209 insertions, 125 deletions

diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index 40ac7759c3bb..33f55917f23f 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -14,6 +14,7 @@ Following translations are available on the WWW:
         - this file.
 ABI/
         - info on kernel <-> userspace ABI and relative interface stability.
+
 BUG-HUNTING
         - brute force method of doing binary search of patches to find bug.
 Changes
@@ -66,6 +67,8 @@ VGA-softcursor.txt
         - how to change your VGA cursor from a blinking underscore.
 accounting/
         - documentation on accounting and taskstats.
+acpi/
+        - info on ACPI-specific hooks in the kernel.
 aoe/
         - description of AoE (ATA over Ethernet) along with config examples.
 applying-patches.txt
diff --git a/Documentation/acpi/method-tracing.txt b/Documentation/acpi/method-tracing.txt
new file mode 100644
index 000000000000..f6efb1ea559a
--- /dev/null
+++ b/Documentation/acpi/method-tracing.txt
@@ -0,0 +1,26 @@
+/sys/module/acpi/parameters/:
+
+trace_method_name
+        The AML method name that the user wants to trace
+
+trace_debug_layer
+        The temporary debug_layer used when tracing the method.
+        Using 0xffffffff by default if it is 0.
+
+trace_debug_level
+        The temporary debug_level used when tracing the method.
+        Using 0x00ffffff by default if it is 0.
+
+trace_state
+        The status of the tracing feature.
+
+        "enabled" means this feature is enabled
+        and the AML method is traced every time it's executed.
+
+        "1" means this feature is enabled and the AML method
+        will only be traced during the next execution.
+
+        "disabled" means this feature is disabled.
+        Users can enable/disable this debug tracing feature by
+        "echo string > /sys/module/acpi/parameters/trace_state".
+        "string" should be one of "enable", "disable" and "1".
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 00b5d08f6da8..d20a3cc8b424 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -69,6 +69,20 @@ unsigned int acpi_cpei_phys_cpuid;
 
 unsigned long acpi_wakeup_address = 0;
 
+#ifdef CONFIG_IA64_GENERIC
+static unsigned long __init acpi_find_rsdp(void)
+{
+        unsigned long rsdp_phys = 0;
+
+        if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
+                rsdp_phys = efi.acpi20;
+        else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
+                printk(KERN_WARNING PREFIX
+                       "v1.0/r0.71 tables no longer supported\n");
+        return rsdp_phys;
+}
+#endif
+
 const char __init *
 acpi_get_sysname(void)
 {
@@ -631,18 +645,6 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table)
         return 0;
 }
 
-unsigned long __init acpi_find_rsdp(void)
-{
-        unsigned long rsdp_phys = 0;
-
-        if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
-                rsdp_phys = efi.acpi20;
-        else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
-                printk(KERN_WARNING PREFIX
-                       "v1.0/r0.71 tables no longer supported\n");
-        return rsdp_phys;
-}
-
 int __init acpi_boot_init(void)
 {
 
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index d2a58431a074..fc8825d4b996 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -587,25 +587,6 @@ int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 
 EXPORT_SYMBOL(acpi_unregister_ioapic);
 
-static unsigned long __init
-acpi_scan_rsdp(unsigned long start, unsigned long length)
-{
-        unsigned long offset = 0;
-        unsigned long sig_len = sizeof("RSD PTR ") - 1;
-
-        /*
-         * Scan all 16-byte boundaries of the physical memory region for the
-         * RSDP signature.
-         */
-        for (offset = 0; offset < length; offset += 16) {
-                if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
-                        continue;
-                return (start + offset);
-        }
-
-        return 0;
-}
-
 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 {
         struct acpi_table_boot *sb;
@@ -748,27 +729,6 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table)
         return 0;
 }
 
-unsigned long __init acpi_find_rsdp(void)
-{
-        unsigned long rsdp_phys = 0;
-
-        if (efi_enabled) {
-                if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
-                        return efi.acpi20;
-                else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
-                        return efi.acpi;
-        }
-        /*
-         * Scan memory looking for the RSDP signature. First search EBDA (low
-         * memory) paragraphs and then search upper memory (E0000-FFFFF).
-         */
-        rsdp_phys = acpi_scan_rsdp(0, 0x400);
-        if (!rsdp_phys)
-                rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
-
-        return rsdp_phys;
-}
-
 #ifdef  CONFIG_X86_LOCAL_APIC
 /*
  * Parse LAPIC entries in MADT
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
index 76c3ab0da468..98d4fdb7dc04 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -189,10 +189,7 @@ static unsigned int pentium4_get_frequency(void)
                 printk(KERN_DEBUG "speedstep-lib: couldn't detect FSB speed. Please send an e-mail to <linux@brodo.de>\n");
 
         /* Multiplier. */
-        if (c->x86_model < 2)
-                mult = msr_lo >> 27;
-        else
-                mult = msr_lo >> 24;
+        mult = msr_lo >> 24;
 
         dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n", fsb, mult, (fsb * mult));
 
diff --git a/arch/x86/kernel/srat_32.c b/arch/x86/kernel/srat_32.c
index 2bf6903cb444..b72e61359c36 100644
--- a/arch/x86/kernel/srat_32.c
+++ b/arch/x86/kernel/srat_32.c
@@ -274,7 +274,7 @@ int __init get_memcfg_from_srat(void)
         int tables = 0;
         int i = 0;
 
-        rsdp_address = acpi_find_rsdp();
+        rsdp_address = acpi_os_get_root_pointer();
         if (!rsdp_address) {
                 printk("%s: System description tables not found\n",
                        __FUNCTION__);
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 8809654d6cc9..3ade01680989 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -70,8 +70,6 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
         /* IBM 600E - _ADR should return 7, but it returns 1 */
         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
          "Incorrect _ADR", 1},
-        {"ASUS\0\0", "P2B-S   ", 0, ACPI_SIG_DSDT, all_versions,
-         "Bogus PCI routing", 1},
 
         {""}
 };
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index bf513e07b773..6df564f4ca6e 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -130,6 +130,63 @@ static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
 module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
 module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
 
+static char trace_method_name[6];
+module_param_string(trace_method_name, trace_method_name, 6, 0644);
+static unsigned int trace_debug_layer;
+module_param(trace_debug_layer, uint, 0644);
+static unsigned int trace_debug_level;
+module_param(trace_debug_level, uint, 0644);
+
+static int param_set_trace_state(const char *val, struct kernel_param *kp)
+{
+        int result = 0;
+
+        if (!strncmp(val, "enable", strlen("enable") - 1)) {
+                result = acpi_debug_trace(trace_method_name, trace_debug_level,
+                                          trace_debug_layer, 0);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        if (!strncmp(val, "disable", strlen("disable") - 1)) {
+                int name = 0;
+                result = acpi_debug_trace((char *)&name, trace_debug_level,
+                                          trace_debug_layer, 0);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        if (!strncmp(val, "1", 1)) {
+                result = acpi_debug_trace(trace_method_name, trace_debug_level,
+                                          trace_debug_layer, 1);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        result = -EINVAL;
+exit:
+        return result;
+}
+
+static int param_get_trace_state(char *buffer, struct kernel_param *kp)
+{
+        if (!acpi_gbl_trace_method_name)
+                return sprintf(buffer, "disable");
+        else {
+                if (acpi_gbl_trace_flags & 1)
+                        return sprintf(buffer, "1");
+                else
+                        return sprintf(buffer, "enable");
+        }
+        return 0;
+}
+
+module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
+                  NULL, 0644);
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 987b967c7467..7222a18a0319 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -573,7 +573,7 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
                       void *handler_context, void *region_context)
 {
         struct acpi_ec *ec = handler_context;
-        int result = 0, i = 0;
+        int result = 0, i;
         u8 temp = 0;
 
         if ((address > 0xFF) || !value || !handler_context)
@@ -585,7 +585,18 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
         if (bits != 8 && acpi_strict)
                 return AE_BAD_PARAMETER;
 
-        while (bits - i > 0) {
+        acpi_ec_burst_enable(ec);
+
+        if (function == ACPI_READ) {
+                result = acpi_ec_read(ec, address, &temp);
+                *value = temp;
+        } else {
+                temp = 0xff & (*value);
+                result = acpi_ec_write(ec, address, temp);
+        }
+
+        for (i = 8; unlikely(bits - i > 0); i += 8) {
+                ++address;
                 if (function == ACPI_READ) {
                         result = acpi_ec_read(ec, address, &temp);
                         (*value) |= ((acpi_integer)temp) << i;
@@ -593,10 +604,10 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
                         temp = 0xff & ((*value) >> i);
                         result = acpi_ec_write(ec, address, temp);
                 }
-                i += 8;
-                ++address;
         }
 
+        acpi_ec_burst_disable(ec);
+
         switch (result) {
         case -EINVAL:
                 return AE_BAD_PARAMETER;
diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
index e22f4a973c0f..056b78844829 100644
--- a/drivers/acpi/events/evgpe.c
+++ b/drivers/acpi/events/evgpe.c
@@ -270,18 +270,18 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
         case ACPI_GPE_TYPE_WAKE_RUN:
                 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
 
-                /*lint -fallthrough */
+                /* fallthrough */
 
         case ACPI_GPE_TYPE_RUNTIME:
 
                 /* Disable the requested runtime GPE */
 
                 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
-                status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
-                break;
+
+                /* fallthrough */
 
         default:
-                return_ACPI_STATUS(AE_BAD_PARAMETER);
+                acpi_hw_write_gpe_enable_reg(gpe_event_info);
         }
 
         return_ACPI_STATUS(AE_OK);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index e53fb516f9d4..e96f3d933f67 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -250,8 +250,12 @@ acpi_physical_address __init acpi_os_get_root_pointer(void)
                                "System description tables not found\n");
                         return 0;
                 }
-        } else
-                return acpi_find_rsdp();
+        } else {
+                acpi_physical_address pa = 0;
+
+                acpi_find_root_pointer(&pa);
+                return pa;
+        }
 }
 
 void __iomem *acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index e48ee4f8749f..c53113e18004 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -812,11 +812,18 @@ static int is_processor_present(acpi_handle handle)
 
 
         status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-        if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) {
-                ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present"));
-                return 0;
-        }
-        return 1;
+        /*
+         * if a processor object does not have an _STA object,
+         * OSPM assumes that the processor is present.
+         */
+        if (status == AE_NOT_FOUND)
+                return 1;
+
+        if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT))
+                return 1;
+
+        ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present"));
+        return 0;
 }
 
 static
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 1538355c266b..f8df5217d477 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -178,6 +178,9 @@ static int get_date_field(char **p, u32 * value)
          * Try to find delimeter, only to insert null.  The end of the
          * string won't have one, but is still valid.
          */
+        if (*p == NULL)
+                return result;
+
         next = strpbrk(*p, "- :");
         if (next)
                 *next++ = '\0';
@@ -190,6 +193,8 @@ static int get_date_field(char **p, u32 * value)
 
         if (next)
                 *p = next;
+        else
+                *p = NULL;
 
         return result;
 }
@@ -251,27 +256,6 @@ acpi_system_write_alarm(struct file *file,
         if ((result = get_date_field(&p, &sec)))
                 goto end;
 
-        if (sec > 59) {
-                min += 1;
-                sec -= 60;
-        }
-        if (min > 59) {
-                hr += 1;
-                min -= 60;
-        }
-        if (hr > 23) {
-                day += 1;
-                hr -= 24;
-        }
-        if (day > 31) {
-                mo += 1;
-                day -= 31;
-        }
-        if (mo > 12) {
-                yr += 1;
-                mo -= 12;
-        }
-
         spin_lock_irq(&rtc_lock);
 
         rtc_control = CMOS_READ(RTC_CONTROL);
@@ -288,24 +272,24 @@ acpi_system_write_alarm(struct file *file,
         spin_unlock_irq(&rtc_lock);
 
         if (sec > 59) {
-                min++;
-                sec -= 60;
+                min += sec/60;
+                sec = sec%60;
         }
         if (min > 59) {
-                hr++;
-                min -= 60;
+                hr += min/60;
+                min = min%60;
         }
         if (hr > 23) {
-                day++;
-                hr -= 24;
+                day += hr/24;
+                hr = hr%24;
         }
         if (day > 31) {
-                mo++;
-                day -= 31;
+                mo += day/32;
+                day = day%32;
         }
         if (mo > 12) {
-                yr++;
-                mo -= 12;
+                yr += mo/13;
+                mo = mo%13;
         }
 
         spin_lock_irq(&rtc_lock);
diff --git a/drivers/acpi/tables/Makefile b/drivers/acpi/tables/Makefile
index 0a7d7afac255..7385efa61622 100644
--- a/drivers/acpi/tables/Makefile
+++ b/drivers/acpi/tables/Makefile
@@ -2,6 +2,6 @@
 # Makefile for all Linux ACPI interpreter subdirectories
 #
 
-obj-y := tbxface.o tbinstal.o  tbutils.o tbfind.o tbfadt.o
+obj-y := tbxface.o tbinstal.o tbutils.o tbfind.o tbfadt.o tbxfroot.o
 
 EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
index cf8fa514189f..9ecb4b6c1e7d 100644
--- a/drivers/acpi/tables/tbxfroot.c
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -100,7 +100,7 @@ static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_tb_find_rsdp
+ * FUNCTION:    acpi_find_root_pointer
  *
  * PARAMETERS:  table_address           - Where the table pointer is returned
  *
@@ -219,8 +219,6 @@ acpi_status acpi_find_root_pointer(acpi_native_uint * table_address)
         return_ACPI_STATUS(AE_NOT_FOUND);
 }
 
-ACPI_EXPORT_SYMBOL(acpi_find_root_pointer)
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_scan_memory_for_rsdp
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5f79b4451212..3a0af9a8cd27 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -492,7 +492,7 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz)
 
 static int acpi_thermal_critical(struct acpi_thermal *tz)
 {
-        if (!tz || !tz->trips.critical.flags.valid || nocrt)
+        if (!tz || !tz->trips.critical.flags.valid)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.critical.temperature) {
@@ -501,9 +501,6 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
         } else if (tz->trips.critical.flags.enabled)
                 tz->trips.critical.flags.enabled = 0;
 
-        printk(KERN_EMERG
-               "Critical temperature reached (%ld C), shutting down.\n",
-               KELVIN_TO_CELSIUS(tz->temperature));
         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,
@@ -511,14 +508,20 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
                                           ACPI_THERMAL_NOTIFY_CRITICAL,
                                           tz->trips.critical.flags.enabled);
 
-        orderly_poweroff(true);
+        /* take no action if nocrt is set */
+        if(!nocrt) {
+                printk(KERN_EMERG
+                        "Critical temperature reached (%ld C), shutting down.\n",
+                        KELVIN_TO_CELSIUS(tz->temperature));
+                orderly_poweroff(true);
+        }
 
         return 0;
 }
 
 static int acpi_thermal_hot(struct acpi_thermal *tz)
 {
-        if (!tz || !tz->trips.hot.flags.valid || nocrt)
+        if (!tz || !tz->trips.hot.flags.valid)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.hot.temperature) {
@@ -534,7 +537,7 @@ static int acpi_thermal_hot(struct acpi_thermal *tz)
                                           ACPI_THERMAL_NOTIFY_HOT,
                                           tz->trips.hot.flags.enabled);
 
-        /* TBD: Call user-mode "sleep(S4)" function */
+        /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */
 
         return 0;
 }
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index bd77e81e81c1..a54ff6bce8fa 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -292,18 +292,26 @@ static int acpi_video_device_set_state(struct acpi_video_device *device, int sta
 static int acpi_video_get_brightness(struct backlight_device *bd)
 {
         unsigned long cur_level;
+        int i;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)bl_get_data(bd);
         acpi_video_device_lcd_get_level_current(vd, &cur_level);
-        return (int) cur_level;
+        for (i = 2; i < vd->brightness->count; i++) {
+                if (vd->brightness->levels[i] == cur_level)
+                        /* The first two entries are special - see page 575
+                           of the ACPI spec 3.0 */
+                        return i-2;
+        }
+        return 0;
 }
 
 static int acpi_video_set_brightness(struct backlight_device *bd)
 {
-        int request_level = bd->props.brightness;
+        int request_level = bd->props.brightness+2;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)bl_get_data(bd);
-        acpi_video_device_lcd_set_level(vd, request_level);
+        acpi_video_device_lcd_set_level(vd,
+                                        vd->brightness->levels[request_level]);
         return 0;
 }
 
@@ -652,7 +660,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
         kfree(obj);
 
         if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
-                unsigned long tmp;
                 static int count = 0;
                 char *name;
                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
@@ -660,11 +667,10 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         return;
 
                 sprintf(name, "acpi_video%d", count++);
-                acpi_video_device_lcd_get_level_current(device, &tmp);
                 device->backlight = backlight_device_register(name,
                         NULL, device, &acpi_backlight_ops);
-                device->backlight->props.max_brightness = max_level;
-                device->backlight->props.brightness = (int)tmp;
+                device->backlight->props.max_brightness = device->brightness->count-3;
+                device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
                 backlight_update_status(device->backlight);
 
                 kfree(name);
@@ -1256,8 +1262,37 @@ acpi_video_bus_write_DOS(struct file *file,
 
 static int acpi_video_bus_add_fs(struct acpi_device *device)
 {
+        long device_id;
+        int status;
         struct proc_dir_entry *entry = NULL;
         struct acpi_video_bus *video;
+        struct device *dev;
+
+        status =
+            acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
+
+        if (!ACPI_SUCCESS(status))
+                return -ENODEV;
+
+        /* 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 video device in the host bridge */
+        if (device_id >= 0x10000) {
+                /* It looks like a PCI device. Does it exist? */
+                dev = acpi_get_physical_device(device->handle);
+        } else {
+                /* It doesn't look like a PCI device. Does its parent
+                   exist? */
+                acpi_handle phandle;
+                if (acpi_get_parent(device->handle, &phandle))
+                        return -ENODEV;
+                dev = acpi_get_physical_device(phandle);
+        }
+        if (!dev)
+                return -ENODEV;
+        put_device(dev);
+
 
 
         video = acpi_driver_data(device);
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index dada89906314..662b4c279cfc 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -183,7 +183,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
         if (ACPI_SUCCESS(status))
                 dev->capabilities |= PNP_CONFIGURABLE;
         dev->capabilities |= PNP_READ;
-        if (device->flags.dynamic_status)
+        if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
                 dev->capabilities |= PNP_WRITE;
         if (device->flags.removable)
                 dev->capabilities |= PNP_REMOVABLE;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 63f2e6ed698f..de09704d3dd2 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -80,7 +80,6 @@ typedef int (*acpi_table_handler) (struct acpi_table_header *table);
 typedef int (*acpi_table_entry_handler) (struct acpi_subtable_header *header, const unsigned long end);
 
 char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
-unsigned long acpi_find_rsdp (void);
 int acpi_boot_init (void);
 int acpi_boot_table_init (void);
 int acpi_numa_init (void);