9 files changed, 207 insertions, 55 deletions

diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index 9c4bd220c44f..86fd142f4bf3 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -1192,6 +1192,7 @@ static int asus_hotk_get_info(void)
                         break;
                 default:
                         kfree(model);
+                        model = NULL;
                         break;
                 }
         }
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 81651032791b..d7b499fe0cd9 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -113,7 +113,7 @@ struct acpi_battery_info {
         acpi_string oem_info;
 };
 
-enum acpi_battery_files{
+enum acpi_battery_files {
         ACPI_BATTERY_INFO = 0,
         ACPI_BATTERY_STATE,
         ACPI_BATTERY_ALARM,
@@ -129,13 +129,14 @@ struct acpi_battery_flags {
 };
 
 struct acpi_battery {
-        struct mutex mutex;
         struct acpi_device *device;
         struct acpi_battery_flags flags;
         struct acpi_buffer bif_data;
         struct acpi_buffer bst_data;
+        struct mutex lock;
         unsigned long alarm;
         unsigned long update_time[ACPI_BATTERY_NUMFILES];
+
 };
 
 inline int acpi_battery_present(struct acpi_battery *battery)
@@ -235,10 +236,10 @@ static int acpi_battery_get_info(struct acpi_battery *battery)
                 return 0;
 
         /* Evaluate _BIF */
-
-        status =
-            acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", NULL,
-                                 &buffer);
+        mutex_lock(&battery->lock);
+        status = acpi_evaluate_object(acpi_battery_handle(battery), "_BIF",
+                                      NULL, &buffer);
+        mutex_unlock(&battery->lock);
         if (ACPI_FAILURE(status)) {
                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
                 return -ENODEV;
@@ -285,10 +286,10 @@ static int acpi_battery_get_state(struct acpi_battery *battery)
                 return 0;
 
         /* Evaluate _BST */
-
-        status =
-            acpi_evaluate_object(acpi_battery_handle(battery), "_BST", NULL,
-                                 &buffer);
+        mutex_lock(&battery->lock);
+        status = acpi_evaluate_object(acpi_battery_handle(battery), "_BST",
+                                      NULL, &buffer);
+        mutex_unlock(&battery->lock);
         if (ACPI_FAILURE(status)) {
                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
                 return -ENODEV;
@@ -336,9 +337,10 @@ static int acpi_battery_set_alarm(struct acpi_battery *battery,
 
         arg0.integer.value = alarm;
 
-        status =
-            acpi_evaluate_object(acpi_battery_handle(battery), "_BTP",
+        mutex_lock(&battery->lock);
+        status = acpi_evaluate_object(acpi_battery_handle(battery), "_BTP",
                                  &arg_list, NULL);
+        mutex_unlock(&battery->lock);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
@@ -658,8 +660,6 @@ acpi_battery_write_alarm(struct file *file,
         if (!battery || (count > sizeof(alarm_string) - 1))
                 return -EINVAL;
 
-        mutex_lock(&battery->mutex);
-
         result = acpi_battery_update(battery, 1, &update_result);
         if (result) {
                 result = -ENODEV;
@@ -688,9 +688,7 @@ acpi_battery_write_alarm(struct file *file,
         acpi_battery_check_result(battery, result);
 
         if (!result)
-                result = count;
-
-        mutex_unlock(&battery->mutex);
+                return count;
 
         return result;
 }
@@ -714,8 +712,6 @@ static int acpi_battery_read(int fid, struct seq_file *seq)
         int update_result = ACPI_BATTERY_NONE_UPDATE;
         int update = 0;
 
-        mutex_lock(&battery->mutex);
-
         update = (get_seconds() - battery->update_time[fid] >= update_time);
         update = (update | battery->flags.update[fid]);
 
@@ -733,7 +729,6 @@ static int acpi_battery_read(int fid, struct seq_file *seq)
         result = acpi_read_funcs[fid].print(seq, result);
         acpi_battery_check_result(battery, result);
         battery->flags.update[fid] = result;
-        mutex_unlock(&battery->mutex);
         return result;
 }
 
@@ -897,10 +892,7 @@ static int acpi_battery_add(struct acpi_device *device)
         if (!battery)
                 return -ENOMEM;
 
-        mutex_init(&battery->mutex);
-
-        mutex_lock(&battery->mutex);
-
+        mutex_init(&battery->lock);
         battery->device = device;
         strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
@@ -936,7 +928,6 @@ static int acpi_battery_add(struct acpi_device *device)
                 kfree(battery);
         }
 
-        mutex_unlock(&battery->mutex);
 
         return result;
 }
@@ -951,8 +942,6 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
 
         battery = acpi_driver_data(device);
 
-        mutex_lock(&battery->mutex);
-
         status = acpi_remove_notify_handler(device->handle,
                                             ACPI_ALL_NOTIFY,
                                             acpi_battery_notify);
@@ -963,9 +952,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
 
         kfree(battery->bst_data.pointer);
 
-        mutex_unlock(&battery->mutex);
-
-        mutex_destroy(&battery->mutex);
+        mutex_destroy(&battery->lock);
 
         kfree(battery);
 
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index 5b302c4e293f..a9e3331fee5d 100644
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -52,6 +52,8 @@ ACPI_MODULE_NAME("tbxface")
 /* Local prototypes */
 static acpi_status acpi_tb_load_namespace(void);
 
+static int no_auto_ssdt;
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_allocate_root_table
@@ -536,6 +538,10 @@ static acpi_status acpi_tb_load_namespace(void)
 
                 ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS"));
                 acpi_tb_print_table_header(0, table);
+
+                if (no_auto_ssdt == 0) {
+                        printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"");
+                }
         }
 
         status =
@@ -577,6 +583,11 @@ static acpi_status acpi_tb_load_namespace(void)
                         continue;
                 }
 
+                if (no_auto_ssdt) {
+                        printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
+                        continue;
+                }
+
                 /* Ignore errors while loading tables, get as many as possible */
 
                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
@@ -622,3 +633,15 @@ acpi_status acpi_load_tables(void)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_load_tables)
+
+
+static int __init acpi_no_auto_ssdt_setup(char *s) {
+
+        printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
+
+        no_auto_ssdt = 1;
+
+        return 1;
+}
+
+__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5a62de1b7f2a..1e06159fd9c4 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -33,6 +33,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/dmi.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
@@ -74,10 +75,26 @@ MODULE_AUTHOR("Paul Diefenbaugh");
 MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
 MODULE_LICENSE("GPL");
 
+static int act;
+module_param(act, int, 0644);
+MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n");
+
 static int tzp;
-module_param(tzp, int, 0);
+module_param(tzp, int, 0444);
 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
 
+static int nocrt;
+module_param(nocrt, int, 0);
+MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n");
+
+static int off;
+module_param(off, int, 0);
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
+
+static int psv;
+module_param(psv, int, 0644);
+MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");
+
 static int acpi_thermal_add(struct acpi_device *device);
 static int acpi_thermal_remove(struct acpi_device *device, int type);
 static int acpi_thermal_resume(struct acpi_device *device);
@@ -339,9 +356,16 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 
         /* Passive: Processors (optional) */
 
-        status =
-            acpi_evaluate_integer(tz->device->handle, "_PSV", NULL,
-                                  &tz->trips.passive.temperature);
+        if (psv == -1) {
+                status = AE_SUPPORT;
+        } else if (psv > 0) {
+                tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
+                status = AE_OK;
+        } else {
+                status = acpi_evaluate_integer(tz->device->handle,
+                        "_PSV", NULL, &tz->trips.passive.temperature);
+        }
+
         if (ACPI_FAILURE(status)) {
                 tz->trips.passive.flags.valid = 0;
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
@@ -386,11 +410,33 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 
                 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
 
-                status =
-                    acpi_evaluate_integer(tz->device->handle, name, NULL,
-                                          &tz->trips.active[i].temperature);
-                if (ACPI_FAILURE(status))
+                if (act == -1)
+                        break;  /* disable all active trip points */
+
+                status = acpi_evaluate_integer(tz->device->handle,
+                        name, NULL, &tz->trips.active[i].temperature);
+
+                if (ACPI_FAILURE(status)) {
+                        if (i == 0)     /* no active trip points */
+                                break;
+                        if (act <= 0)   /* no override requested */
+                                break;
+                        if (i == 1) {   /* 1 trip point */
+                                tz->trips.active[0].temperature =
+                                        CELSIUS_TO_KELVIN(act);
+                        } else {        /* multiple trips */
+                                /*
+                                 * Don't allow override higher than
+                                 * the next higher trip point
+                                 */
+                                tz->trips.active[i - 1].temperature =
+                                    (tz->trips.active[i - 2].temperature <
+                                        CELSIUS_TO_KELVIN(act) ?
+                                        tz->trips.active[i - 2].temperature :
+                                        CELSIUS_TO_KELVIN(act));
+                        }
                         break;
+                }
 
                 name[2] = 'L';
                 status =
@@ -427,7 +473,7 @@ 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)
+        if (!tz || !tz->trips.critical.flags.valid || nocrt)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.critical.temperature) {
@@ -449,7 +495,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
 
 static int acpi_thermal_hot(struct acpi_thermal *tz)
 {
-        if (!tz || !tz->trips.hot.flags.valid)
+        if (!tz || !tz->trips.hot.flags.valid || nocrt)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.hot.temperature) {
@@ -824,12 +870,14 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
                 goto end;
 
         if (tz->trips.critical.flags.valid)
-                seq_printf(seq, "critical (S5):           %ld C\n",
-                           KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
+                seq_printf(seq, "critical (S5):           %ld C%s",
+                           KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
+                           nocrt ? " <disabled>\n" : "\n");
 
         if (tz->trips.hot.flags.valid)
-                seq_printf(seq, "hot (S4):                %ld C\n",
-                           KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
+                seq_printf(seq, "hot (S4):                %ld C%s",
+                           KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
+                           nocrt ? " <disabled>\n" : "\n");
 
         if (tz->trips.passive.flags.valid) {
                 seq_printf(seq,
@@ -1281,11 +1329,78 @@ static int acpi_thermal_resume(struct acpi_device *device)
         return AE_OK;
 }
 
+#ifdef CONFIG_DMI
+static int thermal_act(struct dmi_system_id *d) {
+
+        if (act == 0) {
+                printk(KERN_NOTICE "ACPI: %s detected: "
+                        "disabling all active thermal trip points\n", d->ident);
+                act = -1;
+        }
+        return 0;
+}
+static int thermal_tzp(struct dmi_system_id *d) {
+
+        if (tzp == 0) {
+                printk(KERN_NOTICE "ACPI: %s detected: "
+                        "enabling thermal zone polling\n", d->ident);
+                tzp = 300;      /* 300 dS = 30 Seconds */
+        }
+        return 0;
+}
+static int thermal_psv(struct dmi_system_id *d) {
+
+        if (psv == 0) {
+                printk(KERN_NOTICE "ACPI: %s detected: "
+                        "disabling all passive thermal trip points\n", d->ident);
+                psv = -1;
+        }
+        return 0;
+}
+
+static struct dmi_system_id thermal_dmi_table[] __initdata = {
+        /*
+         * Award BIOS on this AOpen makes thermal control almost worthless.
+         * http://bugzilla.kernel.org/show_bug.cgi?id=8842
+         */
+        {
+         .callback = thermal_act,
+         .ident = "AOpen i915GMm-HFS",
+         .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+                DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+                },
+        },
+        {
+         .callback = thermal_psv,
+         .ident = "AOpen i915GMm-HFS",
+         .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+                DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+                },
+        },
+        {
+         .callback = thermal_tzp,
+         .ident = "AOpen i915GMm-HFS",
+         .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+                DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+                },
+        },
+        {}
+};
+#endif /* CONFIG_DMI */
+
 static int __init acpi_thermal_init(void)
 {
         int result = 0;
 
+        dmi_check_system(thermal_dmi_table);
 
+        if (off) {
+                printk(KERN_NOTICE "ACPI: thermal control disabled\n");
+                return -ENODEV;
+        }
         acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
         if (!acpi_thermal_dir)
                 return -ENODEV;
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index 73037a4d3c50..aeec67e27264 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -1147,10 +1147,15 @@ static int sonypi_acpi_remove(struct acpi_device *device, int type)
         return 0;
 }
 
+const static struct acpi_device_id sonypi_device_ids[] = {
+        {"SNY6001", 0},
+        {"", 0},
+};
+
 static struct acpi_driver sonypi_acpi_driver = {
         .name           = "sonypi",
         .class          = "hkey",
-        .ids            = "SNY6001",
+        .ids            = sonypi_device_ids,
         .ops            = {
                            .add = sonypi_acpi_add,
                            .remove = sonypi_acpi_remove,
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index aaaa61ea4217..518d5d335464 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -200,14 +200,22 @@ config THINKPAD_ACPI_BAY
 config THINKPAD_ACPI_INPUT_ENABLED
         bool "Enable input layer support by default"
         depends on THINKPAD_ACPI
-        default y
+        default n
         ---help---
-          Enables hot key handling over the input layer by default.  If unset,
-          the driver does not enable any hot key handling by default, and also
-          starts up with a mostly empty keymap.
-
-          If you are not sure, say Y here.  Say N to retain the deprecated
-          behavior of ibm-acpi, and thinkpad-acpi for kernels up to 2.6.21.
+          This option enables thinkpad-acpi hot key handling over the input
+          layer at driver load time.  When it is unset, the driver does not
+          enable hot key handling by default, and also starts up with a mostly
+          empty keymap.
+
+          This option should be enabled if you have a new enough HAL or other
+          userspace support that properly handles the thinkpad-acpi event
+          device.  It auto-tunes the hot key support to those reported by the
+          firmware and enables it automatically.
+
+          If unsure, say N here to retain the old behaviour of ibm-acpi, and
+          thinkpad-acpi up to kernel 2.6.21: userspace will have to enable and
+          set up the thinkpad-acpi hot key handling using the sysfs interace
+          after loading the driver.
 
 
 endif # MISC_DEVICES
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 14ee06c8f127..91da6880ae93 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -845,7 +845,7 @@ static struct sony_nc_event sony_C_events[] = {
 };
 
 /* SNC-only model map */
-struct dmi_system_id sony_nc_ids[] = {
+static struct dmi_system_id sony_nc_ids[] = {
                 {
                         .ident = "Sony Vaio FE Series",
                         .callback = sony_nc_C_enable,
@@ -942,6 +942,11 @@ static int sony_nc_resume(struct acpi_device *device)
                 }
         }
 
+        /* set the last requested brightness level */
+        if (sony_backlight_device &&
+                        !sony_backlight_update_status(sony_backlight_device))
+                printk(KERN_WARNING DRV_PFX "unable to restore brightness level");
+
         /* re-initialize models with specific requirements */
         dmi_check_system(sony_nc_ids);
 
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index fa80f355e522..f6cd34a3dbac 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -4668,12 +4668,15 @@ static int __init thinkpad_acpi_module_init(void)
                 thinkpad_acpi_module_exit();
                 return ret;
         }
+        tp_features.platform_drv_registered = 1;
+
         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
         if (ret) {
                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
                 thinkpad_acpi_module_exit();
                 return ret;
         }
+        tp_features.platform_drv_attrs_registered = 1;
 
 
         /* Device initialization */
@@ -4756,8 +4759,11 @@ static void thinkpad_acpi_module_exit(void)
         if (tpacpi_pdev)
                 platform_device_unregister(tpacpi_pdev);
 
-        tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
-        platform_driver_unregister(&tpacpi_pdriver);
+        if (tp_features.platform_drv_attrs_registered)
+                tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
+
+        if (tp_features.platform_drv_registered)
+                platform_driver_unregister(&tpacpi_pdriver);
 
         if (proc_dir)
                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 88af089d6494..eee8809a50d9 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -246,6 +246,8 @@ static struct {
         u16 wan:1;
         u16 fan_ctrl_status_undef:1;
         u16 input_device_registered:1;
+        u16 platform_drv_registered:1;
+        u16 platform_drv_attrs_registered:1;
 } tp_features;
 
 struct thinkpad_id_data {