20 files changed, 311 insertions, 169 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a326487a3ab5..975f029be25c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -163,6 +163,8 @@ and is between 256 and 4096 characters. It is defined in the file
         acpi_irq_isa=   [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
                         Format: <irq>,<irq>...
 
+        acpi_no_auto_ssdt       [HW,ACPI] Disable automatic loading of SSDT
+
         acpi_os_name=   [HW,ACPI] Tell ACPI BIOS the name of the OS
                         Format: To spoof as Windows 98: ="Microsoft Windows"
 
@@ -1820,6 +1822,26 @@ and is between 256 and 4096 characters. It is defined in the file
         thash_entries=  [KNL,NET]
                         Set number of hash buckets for TCP connection
 
+        thermal.act=    [HW,ACPI]
+                        -1: disable all active trip points in all thermal zones
+                        <degrees C>: override all lowest active trip points
+
+        thermal.nocrt=  [HW,ACPI]
+                        Set to disable actions on ACPI thermal zone
+                        critical and hot trip points.
+
+        thermal.off=    [HW,ACPI]
+                        1: disable ACPI thermal control
+
+        thermal.psv=    [HW,ACPI]
+                        -1: disable all passive trip points
+                        <degrees C>: override all passive trip points to this value
+
+        thermal.tzp=    [HW,ACPI]
+                        Specify global default ACPI thermal zone polling rate
+                        <deci-seconds>: poll all this frequency
+                        0: no polling (default)
+
         time            Show timing data prefixed to each printk message line
                         [deprecated, see 'printk.time']
 
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index 6711fbcf4080..eb2f5986e1eb 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -105,10 +105,10 @@ The version of thinkpad-acpi's sysfs interface is exported by the driver
 as a driver attribute (see below).
 
 Sysfs driver attributes are on the driver's sysfs attribute space,
-for 2.6.20 this is /sys/bus/platform/drivers/thinkpad-acpi/.
+for 2.6.20 this is /sys/bus/platform/drivers/thinkpad_acpi/.
 
 Sysfs device attributes are on the driver's sysfs attribute space,
-for 2.6.20 this is /sys/devices/platform/thinkpad-acpi/.
+for 2.6.20 this is /sys/devices/platform/thinkpad_acpi/.
 
 Driver version
 --------------
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 32d04b083e38..705e13a30781 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -68,7 +68,8 @@ struct acpi_cpufreq_data {
 };
 
 static struct acpi_cpufreq_data *drv_data[NR_CPUS];
-static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
+/* acpi_perf_data is a pointer to percpu data. */
+static struct acpi_processor_performance *acpi_perf_data;
 
 static struct cpufreq_driver acpi_cpufreq_driver;
 
@@ -508,24 +509,14 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
  * do _PDC and _PSD and find out the processor dependency for the
  * actual init that will happen later...
  */
-static int acpi_cpufreq_early_init(void)
+static int __init acpi_cpufreq_early_init(void)
 {
-        struct acpi_processor_performance *data;
-        unsigned int i, j;
-
         dprintk("acpi_cpufreq_early_init\n");
 
-        for_each_possible_cpu(i) {
-                data = kzalloc(sizeof(struct acpi_processor_performance),
-                               GFP_KERNEL);
-                if (!data) {
-                        for_each_possible_cpu(j) {
-                                kfree(acpi_perf_data[j]);
-                                acpi_perf_data[j] = NULL;
-                        }
-                        return -ENOMEM;
-                }
-                acpi_perf_data[i] = data;
+        acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
+        if (!acpi_perf_data) {
+                dprintk("Memory allocation error for acpi_perf_data.\n");
+                return -ENOMEM;
         }
 
         /* Do initialization in ACPI core */
@@ -574,14 +565,11 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
         dprintk("acpi_cpufreq_cpu_init\n");
 
-        if (!acpi_perf_data[cpu])
-                return -ENODEV;
-
         data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
-        data->acpi_data = acpi_perf_data[cpu];
+        data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
         drv_data[cpu] = data;
 
         if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
@@ -778,24 +766,25 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
 
 static int __init acpi_cpufreq_init(void)
 {
+        int ret;
+
         dprintk("acpi_cpufreq_init\n");
 
-        acpi_cpufreq_early_init();
+        ret = acpi_cpufreq_early_init();
+        if (ret)
+                return ret;
 
         return cpufreq_register_driver(&acpi_cpufreq_driver);
 }
 
 static void __exit acpi_cpufreq_exit(void)
 {
-        unsigned int i;
         dprintk("acpi_cpufreq_exit\n");
 
         cpufreq_unregister_driver(&acpi_cpufreq_driver);
 
-        for_each_possible_cpu(i) {
-                kfree(acpi_perf_data[i]);
-                acpi_perf_data[i] = NULL;
-        }
+        free_percpu(acpi_perf_data);
+
         return;
 }
 
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/bay.c b/drivers/acpi/bay.c
index 56a5b3fffeb3..6daf6088ac88 100644
--- a/drivers/acpi/bay.c
+++ b/drivers/acpi/bay.c
@@ -337,7 +337,7 @@ static void bay_notify(acpi_handle handle, u32 event, void *data)
         char *envp[] = { event_string, NULL };
 
         bay_dprintk(handle, "Bay event");
-        sprintf(event_string, "BAY_EVENT=%d\n", event);
+        sprintf(event_string, "BAY_EVENT=%d", event);
         kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
 }
 
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 6192c8be66df..1dabdf4c07b3 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -336,13 +336,13 @@ 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;
-        char event_string[7];
+        char event_string[13];
         char *envp[] = { event_string, NULL };
 
         if (num == UNDOCK_EVENT)
-                sprintf(event_string, "UNDOCK");
+                sprintf(event_string, "EVENT=undock");
         else
-                sprintf(event_string, "DOCK");
+                sprintf(event_string, "EVENT=dock");
 
         /*
          * Indicate that the status of the dock station has
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 469f3f57f881..2300d81bbc4e 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -471,7 +471,6 @@ static void acpi_ec_gpe_query(void *ec_cxt)
                 }
         }
         mutex_unlock(&ec->lock);
-        printk(KERN_ERR PREFIX "Handler for query 0x%x is not found!\n", value);
 }
 
 static u32 acpi_ec_gpe_handler(void *data)
@@ -653,42 +652,39 @@ static struct acpi_ec *make_acpi_ec(void)
 }
 
 static acpi_status
-acpi_ec_register_query_methods(acpi_handle handle, u32 level,
-                               void *context, void **return_value)
+ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 {
-        struct acpi_namespace_node *node = handle;
-        struct acpi_ec *ec = context;
-        int value = 0;
-        if (sscanf(node->name.ascii, "_Q%x", &value) == 1) {
-                acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
-        }
-        return AE_OK;
-}
+        acpi_status status;
 
-static int ec_parse_device(struct acpi_ec *ec, acpi_handle handle)
-{
-        if (ACPI_FAILURE(acpi_walk_resources(handle, METHOD_NAME__CRS,
-                                     ec_parse_io_ports, ec)))
-                return -EINVAL;
+        struct acpi_ec *ec = context;
+        status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+                                     ec_parse_io_ports, ec);
+        if (ACPI_FAILURE(status))
+                return status;
 
         /* Get GPE bit assignment (EC events). */
         /* TODO: Add support for _GPE returning a package */
-        if (ACPI_FAILURE(acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe)))
-                return -EINVAL;
+        status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe);
+        if (ACPI_FAILURE(status))
+                return status;
 
         /* Use the global lock for all EC transactions? */
         acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
 
-        /* Find and register all query methods */
-        acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1,
-                            acpi_ec_register_query_methods, ec, NULL);
-
         ec->handle = handle;
 
-        printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx",
+        printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
                           ec->gpe, ec->command_addr, ec->data_addr);
 
-        return 0;
+        return AE_CTRL_TERMINATE;
+}
+
+static void ec_remove_handlers(struct acpi_ec *ec)
+{
+        acpi_remove_address_space_handler(ec->handle,
+                                          ACPI_ADR_SPACE_EC,
+                                          &acpi_ec_space_handler);
+        acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
 }
 
 static int acpi_ec_add(struct acpi_device *device)
@@ -705,7 +701,8 @@ static int acpi_ec_add(struct acpi_device *device)
         if (!ec)
                 return -ENOMEM;
 
-        if (ec_parse_device(ec, device->handle)) {
+        if (ec_parse_device(device->handle, 0, ec, NULL) !=
+            AE_CTRL_TERMINATE) {
                 kfree(ec);
                 return -EINVAL;
         }
@@ -713,16 +710,13 @@ static int acpi_ec_add(struct acpi_device *device)
         /* Check if we found the boot EC */
         if (boot_ec) {
                 if (boot_ec->gpe == ec->gpe) {
-                        /* We might have incorrect info for GL at boot time */
-                        mutex_lock(&boot_ec->lock);
-                        boot_ec->global_lock = ec->global_lock;
-                        /* Copy handlers from new ec into boot ec */
-                        list_splice(&ec->list, &boot_ec->list);
-                        mutex_unlock(&boot_ec->lock);
-                        kfree(ec);
-                        ec = boot_ec;
+                        ec_remove_handlers(boot_ec);
+                        mutex_destroy(&boot_ec->lock);
+                        kfree(boot_ec);
+                        first_ec = boot_ec = NULL;
                 }
-        } else
+        }
+        if (!first_ec)
                 first_ec = ec;
         ec->handle = device->handle;
         acpi_driver_data(device) = ec;
@@ -734,14 +728,14 @@ static int acpi_ec_add(struct acpi_device *device)
 static int acpi_ec_remove(struct acpi_device *device, int type)
 {
         struct acpi_ec *ec;
-        struct acpi_ec_query_handler *handler;
+        struct acpi_ec_query_handler *handler, *tmp;
 
         if (!device)
                 return -EINVAL;
 
         ec = acpi_driver_data(device);
         mutex_lock(&ec->lock);
-        list_for_each_entry(handler, &ec->list, node) {
+        list_for_each_entry_safe(handler, tmp, &ec->list, node) {
                 list_del(&handler->node);
                 kfree(handler);
         }
@@ -751,9 +745,6 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
         if (ec == first_ec)
                 first_ec = NULL;
 
-        /* Don't touch boot EC */
-        if (boot_ec != ec)
-                kfree(ec);
         return 0;
 }
 
@@ -817,9 +808,7 @@ static int acpi_ec_start(struct acpi_device *device)
         if (!ec)
                 return -EINVAL;
 
-        /* Boot EC is already working */
-        if (ec != boot_ec)
-                ret = ec_install_handlers(ec);
+        ret = ec_install_handlers(ec);
 
         /* EC is fully operational, allow queries */
         atomic_set(&ec->query_pending, 0);
@@ -829,7 +818,6 @@ static int acpi_ec_start(struct acpi_device *device)
 
 static int acpi_ec_stop(struct acpi_device *device, int type)
 {
-        acpi_status status;
         struct acpi_ec *ec;
 
         if (!device)
@@ -838,21 +826,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
         ec = acpi_driver_data(device);
         if (!ec)
                 return -EINVAL;
-
-        /* Don't touch boot EC */
-        if (ec == boot_ec)
-                return 0;
-
-        status = acpi_remove_address_space_handler(ec->handle,
-                                                   ACPI_ADR_SPACE_EC,
-                                                   &acpi_ec_space_handler);
-        if (ACPI_FAILURE(status))
-                return -ENODEV;
-
-        status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
-        if (ACPI_FAILURE(status))
-                return -ENODEV;
-
+        ec_remove_handlers(ec);
         return 0;
 }
 
@@ -868,18 +842,21 @@ int __init acpi_ec_ecdt_probe(void)
         /*
          * Generate a boot ec context
          */
-
         status = acpi_get_table(ACPI_SIG_ECDT, 1,
                                 (struct acpi_table_header **)&ecdt_ptr);
-        if (ACPI_FAILURE(status))
-                goto error;
-
-        printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n");
-
-        boot_ec->command_addr = ecdt_ptr->control.address;
-        boot_ec->data_addr = ecdt_ptr->data.address;
-        boot_ec->gpe = ecdt_ptr->gpe;
-        boot_ec->handle = ACPI_ROOT_OBJECT;
+        if (ACPI_SUCCESS(status)) {
+                printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n\n");
+                boot_ec->command_addr = ecdt_ptr->control.address;
+                boot_ec->data_addr = ecdt_ptr->data.address;
+                boot_ec->gpe = ecdt_ptr->gpe;
+                boot_ec->handle = ACPI_ROOT_OBJECT;
+        } else {
+                printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n");
+                status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device,
+                                                boot_ec, NULL);
+                if (ACPI_FAILURE(status))
+                        goto error;
+        }
 
         ret = ec_install_handlers(boot_ec);
         if (!ret) {
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index dfa5853b17f0..95637a4ff782 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -108,7 +108,7 @@ static const struct file_operations acpi_system_event_ops = {
 };
 
 #ifdef CONFIG_NET
-unsigned int acpi_event_seqnum;
+static unsigned int acpi_event_seqnum;
 struct acpi_genl_event {
         acpi_device_class device_class;
         char bus_id[15];
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index a898991f77cb..a8634a0655fc 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -969,11 +969,17 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
         }
 
         if (pr->flags.bm_check) {
-                /* bus mastering control is necessary */
                 if (!pr->flags.bm_control) {
-                        /* In this case we enter C3 without bus mastering */
-                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                "C3 support without bus mastering control\n"));
+                        if (pr->flags.has_cst != 1) {
+                                /* bus mastering control is necessary */
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "C3 support requires BM control\n"));
+                                return;
+                        } else {
+                                /* Here we enter C3 without bus mastering */
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "C3 support without BM control\n"));
+                        }
                 }
         } else {
                 /*
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index c4efc0c17f8f..463b0247cbc5 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -539,7 +539,7 @@ end:
 }
 
 int acpi_processor_preregister_performance(
-                struct acpi_processor_performance **performance)
+                struct acpi_processor_performance *performance)
 {
         int count, count_target;
         int retval = 0;
@@ -567,12 +567,12 @@ int acpi_processor_preregister_performance(
                         continue;
                 }
 
-                if (!performance || !performance[i]) {
+                if (!performance || !percpu_ptr(performance, i)) {
                         retval = -EINVAL;
                         continue;
                 }
 
-                pr->performance = performance[i];
+                pr->performance = percpu_ptr(performance, i);
                 cpu_set(i, pr->performance->shared_cpu_map);
                 if (acpi_processor_get_psd(pr)) {
                         retval = -EINVAL;
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 7d8e78ea13a5..82c3a550016d 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -1415,7 +1415,7 @@ static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
         char dir_name[32];
         int do_battery_init = 0, do_ac_init = 0;
         int old_remaining_capacity = 0;
-        int update_ac = 1, update_battery = 1;
+        int update_battery = 1;
         int up_tm = update_time;
 
         if (sbs_zombie(sbs)) {
@@ -1435,10 +1435,6 @@ static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
 
         sbs->run_cnt++;
 
-        if (!update_ac && !update_battery) {
-                goto end;
-        }
-
         old_ac_present = sbs->ac.ac_present;
 
         result = acpi_ac_get_present(sbs);
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 {
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index f9f987f8e661..ec3ffdadb4d2 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -232,7 +232,7 @@ struct acpi_processor_errata {
 
 extern int acpi_processor_preregister_performance(struct
                                                   acpi_processor_performance
-                                                  **performance);
+                                                  *performance);
 
 extern int acpi_processor_register_performance(struct acpi_processor_performance
                                                *performance, unsigned int cpu);