11 files changed, 171 insertions, 60 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 47768ff87343..80998958cf45 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -208,7 +208,7 @@ config ACPI_IPMI
 
 config ACPI_HOTPLUG_CPU
         bool
-        depends on ACPI_PROCESSOR && HOTPLUG_CPU
+        depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU
         select ACPI_CONTAINER
         default y
 
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 86933ca8b472..7dd3f9fb9f3f 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -643,11 +643,19 @@ static int acpi_battery_update(struct acpi_battery *battery)
 
 static void acpi_battery_refresh(struct acpi_battery *battery)
 {
+        int power_unit;
+
         if (!battery->bat.dev)
                 return;
 
+        power_unit = battery->power_unit;
+
         acpi_battery_get_info(battery);
-        /* The battery may have changed its reporting units. */
+
+        if (power_unit == battery->power_unit)
+                return;
+
+        /* The battery has changed its reporting units. */
         sysfs_remove_battery(battery);
         sysfs_add_battery(battery);
 }
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 3188da3df8da..adceafda9c17 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -182,41 +182,66 @@ EXPORT_SYMBOL(acpi_bus_get_private_data);
                                  Power Management
    -------------------------------------------------------------------------- */
 
+static const char *state_string(int state)
+{
+        switch (state) {
+        case ACPI_STATE_D0:
+                return "D0";
+        case ACPI_STATE_D1:
+                return "D1";
+        case ACPI_STATE_D2:
+                return "D2";
+        case ACPI_STATE_D3_HOT:
+                return "D3hot";
+        case ACPI_STATE_D3_COLD:
+                return "D3";
+        default:
+                return "(unknown)";
+        }
+}
+
 static int __acpi_bus_get_power(struct acpi_device *device, int *state)
 {
-        int result = 0;
-        acpi_status status = 0;
-        unsigned long long psc = 0;
+        int result = ACPI_STATE_UNKNOWN;
 
         if (!device || !state)
                 return -EINVAL;
 
-        *state = ACPI_STATE_UNKNOWN;
-
-        if (device->flags.power_manageable) {
-                /*
-                 * Get the device's power state either directly (via _PSC) or
-                 * indirectly (via power resources).
-                 */
-                if (device->power.flags.power_resources) {
-                        result = acpi_power_get_inferred_state(device, state);
-                        if (result)
-                                return result;
-                } else if (device->power.flags.explicit_get) {
-                        status = acpi_evaluate_integer(device->handle, "_PSC",
-                                                       NULL, &psc);
-                        if (ACPI_FAILURE(status))
-                                return -ENODEV;
-                        *state = (int)psc;
-                }
-        } else {
+        if (!device->flags.power_manageable) {
                 /* TBD: Non-recursive algorithm for walking up hierarchy. */
                 *state = device->parent ?
                         device->parent->power.state : ACPI_STATE_D0;
+                goto out;
+        }
+
+        /*
+         * Get the device's power state either directly (via _PSC) or
+         * indirectly (via power resources).
+         */
+        if (device->power.flags.explicit_get) {
+                unsigned long long psc;
+                acpi_status status = acpi_evaluate_integer(device->handle,
+                                                           "_PSC", NULL, &psc);
+                if (ACPI_FAILURE(status))
+                        return -ENODEV;
+
+                result = psc;
+        }
+        /* The test below covers ACPI_STATE_UNKNOWN too. */
+        if (result <= ACPI_STATE_D2) {
+          ; /* Do nothing. */
+        } else if (device->power.flags.power_resources) {
+                int error = acpi_power_get_inferred_state(device, &result);
+                if (error)
+                        return error;
+        } else if (result == ACPI_STATE_D3_HOT) {
+                result = ACPI_STATE_D3;
         }
+        *state = result;
 
-        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
-                          device->pnp.bus_id, *state));
+ out:
+        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
+                          device->pnp.bus_id, state_string(*state)));
 
         return 0;
 }
@@ -234,13 +259,14 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
         /* Make sure this is a valid target state */
 
         if (state == device->power.state) {
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
-                                  state));
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
+                                  state_string(state)));
                 return 0;
         }
 
         if (!device->power.states[state].flags.valid) {
-                printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
+                printk(KERN_WARNING PREFIX "Device does not support %s\n",
+                       state_string(state));
                 return -ENODEV;
         }
         if (device->parent && (state < device->parent->power.state)) {
@@ -294,13 +320,13 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
       end:
         if (result)
                 printk(KERN_WARNING PREFIX
-                              "Device [%s] failed to transition to D%d\n",
-                              device->pnp.bus_id, state);
+                              "Device [%s] failed to transition to %s\n",
+                              device->pnp.bus_id, state_string(state));
         else {
                 device->power.state = state;
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                  "Device [%s] transitioned to D%d\n",
-                                  device->pnp.bus_id, state));
+                                  "Device [%s] transitioned to %s\n",
+                                  device->pnp.bus_id, state_string(state)));
         }
 
         return result;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 0500f719f63e..dd6d6a3c6780 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -631,7 +631,7 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
          * We know a device's inferred power state when all the resources
          * required for a given D-state are 'on'.
          */
-        for (i = ACPI_STATE_D0; i < ACPI_STATE_D3_HOT; i++) {
+        for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
                 list = &device->power.states[i].resources;
                 if (list->count < 1)
                         continue;
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 0af48a8554cd..a093dc163a42 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -333,6 +333,7 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr)
         struct acpi_buffer state = { 0, NULL };
         union acpi_object *pss = NULL;
         int i;
+        int last_invalid = -1;
 
 
         status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
@@ -394,14 +395,33 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr)
                     ((u32)(px->core_frequency * 1000) !=
                      (px->core_frequency * 1000))) {
                         printk(KERN_ERR FW_BUG PREFIX
-                               "Invalid BIOS _PSS frequency: 0x%llx MHz\n",
-                               px->core_frequency);
-                        result = -EFAULT;
-                        kfree(pr->performance->states);
-                        goto end;
+                               "Invalid BIOS _PSS frequency found for processor %d: 0x%llx MHz\n",
+                               pr->id, px->core_frequency);
+                        if (last_invalid == -1)
+                                last_invalid = i;
+                } else {
+                        if (last_invalid != -1) {
+                                /*
+                                 * Copy this valid entry over last_invalid entry
+                                 */
+                                memcpy(&(pr->performance->states[last_invalid]),
+                                       px, sizeof(struct acpi_processor_px));
+                                ++last_invalid;
+                        }
                 }
         }
 
+        if (last_invalid == 0) {
+                printk(KERN_ERR FW_BUG PREFIX
+                       "No valid BIOS _PSS frequency found for processor %d\n", pr->id);
+                result = -EFAULT;
+                kfree(pr->performance->states);
+                pr->performance->states = NULL;
+        }
+
+        if (last_invalid > 0)
+                pr->performance->state_count = last_invalid;
+
       end:
         kfree(buffer.pointer);
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 85cbfdccc97c..c8a1f3b68110 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1567,6 +1567,7 @@ static int acpi_bus_scan_fixed(void)
                                                 ACPI_BUS_TYPE_POWER_BUTTON,
                                                 ACPI_STA_DEFAULT,
                                                 &ops);
+                device_init_wakeup(&device->dev, true);
         }
 
         if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 74ee4ab577b6..88561029cca8 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -57,6 +57,7 @@ MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
 MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
 
 static u8 sleep_states[ACPI_S_STATE_COUNT];
+static bool pwr_btn_event_pending;
 
 static void acpi_sleep_tts_switch(u32 acpi_state)
 {
@@ -184,6 +185,14 @@ static int acpi_pm_prepare(void)
         return error;
 }
 
+static int find_powerf_dev(struct device *dev, void *data)
+{
+        struct acpi_device *device = to_acpi_device(dev);
+        const char *hid = acpi_device_hid(device);
+
+        return !strcmp(hid, ACPI_BUTTON_HID_POWERF);
+}
+
 /**
  *      acpi_pm_finish - Instruct the platform to leave a sleep state.
  *
@@ -192,6 +201,7 @@ static int acpi_pm_prepare(void)
  */
 static void acpi_pm_finish(void)
 {
+        struct device *pwr_btn_dev;
         u32 acpi_state = acpi_target_sleep_state;
 
         acpi_ec_unblock_transactions();
@@ -209,6 +219,23 @@ static void acpi_pm_finish(void)
         acpi_set_firmware_waking_vector((acpi_physical_address) 0);
 
         acpi_target_sleep_state = ACPI_STATE_S0;
+
+        /* If we were woken with the fixed power button, provide a small
+         * hint to userspace in the form of a wakeup event on the fixed power
+         * button device (if it can be found).
+         *
+         * We delay the event generation til now, as the PM layer requires
+         * timekeeping to be running before we generate events. */
+        if (!pwr_btn_event_pending)
+                return;
+
+        pwr_btn_event_pending = false;
+        pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL,
+                                      find_powerf_dev);
+        if (pwr_btn_dev) {
+                pm_wakeup_event(pwr_btn_dev, 0);
+                put_device(pwr_btn_dev);
+        }
 }
 
 /**
@@ -298,9 +325,23 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
         /* ACPI 3.0 specs (P62) says that it's the responsibility
          * of the OSPM to clear the status bit [ implying that the
          * POWER_BUTTON event should not reach userspace ]
+         *
+         * However, we do generate a small hint for userspace in the form of
+         * a wakeup event. We flag this condition for now and generate the
+         * event later, as we're currently too early in resume to be able to
+         * generate wakeup events.
          */
-        if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
-                acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+        if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
+                acpi_event_status pwr_btn_status;
+
+                acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status);
+
+                if (pwr_btn_status & ACPI_EVENT_FLAG_SET) {
+                        acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+                        /* Flag for later */
+                        pwr_btn_event_pending = true;
+                }
+        }
 
         /*
          * Disable and clear GPE status before interrupt is enabled. Some GPEs
@@ -730,8 +771,8 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
          * can wake the system.  _S0W may be valid, too.
          */
         if (acpi_target_sleep_state == ACPI_STATE_S0 ||
-            (device_may_wakeup(dev) &&
-             adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
+            (device_may_wakeup(dev) && adev->wakeup.flags.valid &&
+             adev->wakeup.sleep_state >= acpi_target_sleep_state)) {
                 acpi_status status;
 
                 acpi_method[3] = 'W';
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 9577b6fa2650..a576575617d7 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1687,10 +1687,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
         set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
         set_bit(KEY_DISPLAY_OFF, input->keybit);
 
-        error = input_register_device(input);
-        if (error)
-                goto err_stop_video;
-
         printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s  rom: %s  post: %s)\n",
                ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
                video->flags.multihead ? "yes" : "no",
@@ -1701,12 +1697,16 @@ static int acpi_video_bus_add(struct acpi_device *device)
         video->pm_nb.priority = 0;
         error = register_pm_notifier(&video->pm_nb);
         if (error)
-                goto err_unregister_input_dev;
+                goto err_stop_video;
+
+        error = input_register_device(input);
+        if (error)
+                goto err_unregister_pm_notifier;
 
         return 0;
 
- err_unregister_input_dev:
-        input_unregister_device(input);
+ err_unregister_pm_notifier:
+        unregister_pm_notifier(&video->pm_nb);
  err_stop_video:
         acpi_video_bus_stop_devices(video);
  err_free_input_dev:
@@ -1743,9 +1743,18 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
         return 0;
 }
 
+static int __init is_i740(struct pci_dev *dev)
+{
+        if (dev->device == 0x00D1)
+                return 1;
+        if (dev->device == 0x7000)
+                return 1;
+        return 0;
+}
+
 static int __init intel_opregion_present(void)
 {
-#if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
+        int opregion = 0;
         struct pci_dev *dev = NULL;
         u32 address;
 
@@ -1754,13 +1763,15 @@ static int __init intel_opregion_present(void)
                         continue;
                 if (dev->vendor != PCI_VENDOR_ID_INTEL)
                         continue;
+                /* We don't want to poke around undefined i740 registers */
+                if (is_i740(dev))
+                        continue;
                 pci_read_config_dword(dev, 0xfc, &address);
                 if (!address)
                         continue;
-                return 1;
+                opregion = 1;
         }
-#endif
-        return 0;
+        return opregion;
 }
 
 int acpi_video_register(void)
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index caba6e08693c..b8a131fcb283 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -327,7 +327,8 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
         PSB_WSGX32(0x20000000, PSB_CR_PDS_EXEC_BASE);
         PSB_WSGX32(0x30000000, PSB_CR_BIF_3D_REQ_BASE);
 
-        acpi_video_register();
+/*      igd_opregion_init(&dev_priv->opregion_dev); */
+/*      acpi_video_register(); */
 
         ret = drm_vblank_init(dev, dev_priv->num_pipe);
         if (ret)
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 7d5f56edb8ef..4267789ca995 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -910,14 +910,17 @@ static inline int cmos_poweroff(struct device *dev)
 
 static u32 rtc_handler(void *context)
 {
+        struct device *dev = context;
+
+        pm_wakeup_event(dev, 0);
         acpi_clear_event(ACPI_EVENT_RTC);
         acpi_disable_event(ACPI_EVENT_RTC, 0);
         return ACPI_INTERRUPT_HANDLED;
 }
 
-static inline void rtc_wake_setup(void)
+static inline void rtc_wake_setup(struct device *dev)
 {
-        acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
+        acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev);
         /*
          * After the RTC handler is installed, the Fixed_RTC event should
          * be disabled. Only when the RTC alarm is set will it be enabled.
@@ -950,7 +953,7 @@ cmos_wake_setup(struct device *dev)
         if (acpi_disabled)
                 return;
 
-        rtc_wake_setup();
+        rtc_wake_setup(dev);
         acpi_rtc_info.wake_on = rtc_wake_on;
         acpi_rtc_info.wake_off = rtc_wake_off;
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index b0d62820ada1..9e6e1c6eb60a 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -440,8 +440,8 @@ static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 
 #else   /* CONFIG_ACPI */
 
-static int register_acpi_bus_type(struct acpi_bus_type *bus) { return 0; }
-static int unregister_acpi_bus_type(struct acpi_bus_type *bus) { return 0; }
+static inline int register_acpi_bus_type(void *bus) { return 0; }
+static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 
 #endif                          /* CONFIG_ACPI */