11 files changed, 211 insertions, 70 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/bgrt.c b/drivers/acpi/bgrt.c
index 8cf6c46e99fb..6680df36b963 100644
--- a/drivers/acpi/bgrt.c
+++ b/drivers/acpi/bgrt.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/sysfs.h>
+#include <linux/io.h>
 #include <acpi/acpi.h>
 #include <acpi/acpi_bus.h>
 
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 3263b68cdfa3..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)) {
@@ -250,6 +276,10 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
                 return -ENODEV;
         }
 
+        /* For D3cold we should execute _PS3, not _PS4. */
+        if (state == ACPI_STATE_D3_COLD)
+                object_name[3] = '3';
+
         /*
          * Transition Power
          * ----------------
@@ -290,13 +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/glue.c b/drivers/acpi/glue.c
index 29a4a5c8ee00..1564e0927c21 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -69,6 +69,7 @@ static struct acpi_bus_type *acpi_get_bus_type(struct bus_type *type)
         up_read(&bus_type_sem);
         return ret;
 }
+EXPORT_SYMBOL_GPL(register_acpi_bus_type);
 
 static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle)
 {
@@ -85,6 +86,7 @@ static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle)
         up_read(&bus_type_sem);
         return ret;
 }
+EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
 
 /* Get device's handler per its address under its parent */
 struct acpi_find_child {
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 4a29763b8eb4..a12808259dfb 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -720,21 +720,21 @@ static int acpi_pci_link_add(struct acpi_device *device)
                acpi_device_bid(device));
         for (i = 0; i < link->irq.possible_count; i++) {
                 if (link->irq.active == link->irq.possible[i]) {
-                        printk(" *%d", link->irq.possible[i]);
+                        printk(KERN_CONT " *%d", link->irq.possible[i]);
                         found = 1;
                 } else
-                        printk(" %d", link->irq.possible[i]);
+                        printk(KERN_CONT " %d", link->irq.possible[i]);
         }
 
-        printk(")");
+        printk(KERN_CONT ")");
 
         if (!found)
-                printk(" *%d", link->irq.active);
+                printk(KERN_CONT " *%d", link->irq.active);
 
         if (!link->device->status.enabled)
-                printk(", disabled.");
+                printk(KERN_CONT ", disabled.");
 
-        printk("\n");
+        printk(KERN_CONT "\n");
 
         list_add_tail(&link->list, &acpi_link_list);
 
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 330bb4d75852..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;
@@ -660,7 +660,7 @@ int acpi_power_on_resources(struct acpi_device *device, int state)
 
 int acpi_power_transition(struct acpi_device *device, int state)
 {
-        int result;
+        int result = 0;
 
         if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
                 return -EINVAL;
@@ -679,8 +679,11 @@ int acpi_power_transition(struct acpi_device *device, int state)
          * (e.g. so the device doesn't lose power while transitioning).  Then,
          * we dereference all power resources used in the current list.
          */
-        result = acpi_power_on_list(&device->power.states[state].resources);
-        if (!result)
+        if (state < ACPI_STATE_D3_COLD)
+                result = acpi_power_on_list(
+                        &device->power.states[state].resources);
+
+        if (!result && device->power.state < ACPI_STATE_D3_COLD)
                 acpi_power_off_list(
                         &device->power.states[device->power.state].resources);
 
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 7417267e88fa..c8a1f3b68110 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -908,6 +908,10 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
         device->power.states[ACPI_STATE_D3].flags.valid = 1;
         device->power.states[ACPI_STATE_D3].power = 0;
 
+        /* Set D3cold's explicit_set flag if _PS3 exists. */
+        if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set)
+                device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1;
+
         acpi_bus_init_power(device);
 
         return 0;
@@ -1563,6 +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 eb6fd233764b..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)
 {
@@ -93,11 +94,9 @@ static int acpi_sleep_prepare(u32 acpi_state)
 #ifdef CONFIG_ACPI_SLEEP
         /* do we have a wakeup address for S2 and S3? */
         if (acpi_state == ACPI_STATE_S3) {
-                if (!acpi_wakeup_address) {
+                if (!acpi_wakeup_address)
                         return -EFAULT;
-                }
-                acpi_set_firmware_waking_vector(
-                                (acpi_physical_address)acpi_wakeup_address);
+                acpi_set_firmware_waking_vector(acpi_wakeup_address);
 
         }
         ACPI_FLUSH_CPU_CACHE();
@@ -186,6 +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.
  *
@@ -194,6 +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();
@@ -211,6 +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);
+        }
 }
 
 /**
@@ -300,9 +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
@@ -732,8 +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';
@@ -887,7 +926,7 @@ int __init acpi_sleep_init(void)
                 status = acpi_get_sleep_type_data(i, &type_a, &type_b);
                 if (ACPI_SUCCESS(status)) {
                         sleep_states[i] = 1;
-                        printk(" S%d", i);
+                        printk(KERN_CONT " S%d", i);
                 }
         }
 
@@ -901,7 +940,7 @@ int __init acpi_sleep_init(void)
                 hibernation_set_ops(old_suspend_ordering ?
                         &acpi_hibernation_ops_old : &acpi_hibernation_ops);
                 sleep_states[ACPI_STATE_S4] = 1;
-                printk(" S4");
+                printk(KERN_CONT " S4");
                 if (!nosigcheck) {
                         acpi_get_table(ACPI_SIG_FACS, 1,
                                 (struct acpi_table_header **)&facs);
@@ -914,11 +953,11 @@ int __init acpi_sleep_init(void)
         status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
         if (ACPI_SUCCESS(status)) {
                 sleep_states[ACPI_STATE_S5] = 1;
-                printk(" S5");
+                printk(KERN_CONT " S5");
                 pm_power_off_prepare = acpi_power_off_prepare;
                 pm_power_off = acpi_power_off;
         }
-        printk(")\n");
+        printk(KERN_CONT ")\n");
         /*
          * Register the tts_notifier to reboot notifier list so that the _TTS
          * object can also be evaluated when the system enters S5.
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index b002a471c5d4..adbbc1c80a26 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -382,3 +382,33 @@ acpi_evaluate_reference(acpi_handle handle,
 }
 
 EXPORT_SYMBOL(acpi_evaluate_reference);
+
+acpi_status
+acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld)
+{
+        acpi_status status;
+        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+        union acpi_object *output;
+
+        status = acpi_evaluate_object(handle, "_PLD", NULL, &buffer);
+
+        if (ACPI_FAILURE(status))
+                return status;
+
+        output = buffer.pointer;
+
+        if (!output || output->type != ACPI_TYPE_PACKAGE
+            || !output->package.count
+            || output->package.elements[0].type != ACPI_TYPE_BUFFER
+            || output->package.elements[0].buffer.length > sizeof(*pld)) {
+                status = AE_TYPE;
+                goto out;
+        }
+
+        memcpy(pld, output->package.elements[0].buffer.pointer,
+               output->package.elements[0].buffer.length);
+out:
+        kfree(buffer.pointer);
+        return status;
+}
+EXPORT_SYMBOL(acpi_get_physical_device_location);
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)