1 files changed, 161 insertions, 100 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 57b053f424d1..7efe546a8c42 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -41,6 +41,7 @@ static DEFINE_MUTEX(acpi_scan_lock);
 static LIST_HEAD(acpi_scan_handlers_list);
 DEFINE_MUTEX(acpi_device_lock);
 LIST_HEAD(acpi_wakeup_device_list);
+static DEFINE_MUTEX(acpi_hp_context_lock);
 
 struct acpi_device_bus_id{
         char bus_id[15];
@@ -60,6 +61,27 @@ void acpi_scan_lock_release(void)
 }
 EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
 
+void acpi_lock_hp_context(void)
+{
+        mutex_lock(&acpi_hp_context_lock);
+}
+
+void acpi_unlock_hp_context(void)
+{
+        mutex_unlock(&acpi_hp_context_lock);
+}
+
+void acpi_initialize_hp_context(struct acpi_device *adev,
+                                struct acpi_hotplug_context *hp,
+                                int (*notify)(struct acpi_device *, u32),
+                                void (*uevent)(struct acpi_device *, u32))
+{
+        acpi_lock_hp_context();
+        acpi_set_hp_context(adev, hp, notify, uevent, NULL);
+        acpi_unlock_hp_context();
+}
+EXPORT_SYMBOL_GPL(acpi_initialize_hp_context);
+
 int acpi_scan_add_handler(struct acpi_scan_handler *handler)
 {
         if (!handler || !handler->attach)
@@ -439,90 +461,75 @@ static int acpi_scan_bus_check(struct acpi_device *adev)
         return 0;
 }
 
-static void acpi_device_hotplug(void *data, u32 src)
+static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
 {
-        u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
-        struct acpi_device *adev = data;
-        int error;
-
-        lock_device_hotplug();
-        mutex_lock(&acpi_scan_lock);
-
-        /*
-         * The device object's ACPI handle cannot become invalid as long as we
-         * are holding acpi_scan_lock, but it may have become invalid before
-         * that lock was acquired.
-         */
-        if (adev->handle == INVALID_ACPI_HANDLE)
-                goto out;
-
-        switch (src) {
+        switch (type) {
         case ACPI_NOTIFY_BUS_CHECK:
-                error = acpi_scan_bus_check(adev);
-                break;
+                return acpi_scan_bus_check(adev);
         case ACPI_NOTIFY_DEVICE_CHECK:
-                error = acpi_scan_device_check(adev);
-                break;
+                return acpi_scan_device_check(adev);
         case ACPI_NOTIFY_EJECT_REQUEST:
         case ACPI_OST_EC_OSPM_EJECT:
-                error = acpi_scan_hot_remove(adev);
-                break;
-        default:
-                error = -EINVAL;
-                break;
+                if (adev->handler && !adev->handler->hotplug.enabled) {
+                        dev_info(&adev->dev, "Eject disabled\n");
+                        return -EPERM;
+                }
+                acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST,
+                                  ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
+                return acpi_scan_hot_remove(adev);
         }
-        if (!error)
-                ost_code = ACPI_OST_SC_SUCCESS;
-
- out:
-        acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
-        put_device(&adev->dev);
-        mutex_unlock(&acpi_scan_lock);
-        unlock_device_hotplug();
+        return -EINVAL;
 }
 
-static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
+void acpi_device_hotplug(struct acpi_device *adev, u32 src)
 {
         u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
-        struct acpi_device *adev;
-        acpi_status status;
+        int error = -ENODEV;
 
-        if (acpi_bus_get_device(handle, &adev))
-                goto err_out;
+        lock_device_hotplug();
+        mutex_lock(&acpi_scan_lock);
 
-        switch (type) {
-        case ACPI_NOTIFY_BUS_CHECK:
-                acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
-                break;
-        case ACPI_NOTIFY_DEVICE_CHECK:
-                acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
-                break;
-        case ACPI_NOTIFY_EJECT_REQUEST:
-                acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
-                if (!adev->handler)
-                        goto err_out;
+        /*
+         * The device object's ACPI handle cannot become invalid as long as we
+         * are holding acpi_scan_lock, but it might have become invalid before
+         * that lock was acquired.
+         */
+        if (adev->handle == INVALID_ACPI_HANDLE)
+                goto err_out;
 
-                if (!adev->handler->hotplug.enabled) {
-                        acpi_handle_err(handle, "Eject disabled\n");
+        if (adev->flags.is_dock_station) {
+                error = dock_notify(adev, src);
+        } else if (adev->flags.hotplug_notify) {
+                error = acpi_generic_hotplug_event(adev, src);
+                if (error == -EPERM) {
                         ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
                         goto err_out;
                 }
-                acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST,
-                                          ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
-                break;
-        default:
-                /* non-hotplug event; possibly handled by other handler */
-                return;
-        }
-        get_device(&adev->dev);
-        status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
-        if (ACPI_SUCCESS(status))
-                return;
+        } else {
+                int (*notify)(struct acpi_device *, u32);
 
-        put_device(&adev->dev);
+                acpi_lock_hp_context();
+                notify = adev->hp ? adev->hp->notify : NULL;
+                acpi_unlock_hp_context();
+                /*
+                 * There may be additional notify handlers for device objects
+                 * without the .event() callback, so ignore them here.
+                 */
+                if (notify)
+                        error = notify(adev, src);
+                else
+                        goto out;
+        }
+        if (!error)
+                ost_code = ACPI_OST_SC_SUCCESS;
 
  err_out:
-        acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
+        acpi_evaluate_ost(adev->handle, src, ost_code, NULL);
+
+ out:
+        acpi_bus_put_acpi_device(adev);
+        mutex_unlock(&acpi_scan_lock);
+        unlock_device_hotplug();
 }
 
 static ssize_t real_power_state_show(struct device *dev,
@@ -570,17 +577,14 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
         if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
                 return -ENODEV;
 
-        acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
-                                  ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
         get_device(&acpi_device->dev);
-        status = acpi_hotplug_execute(acpi_device_hotplug, acpi_device,
-                                      ACPI_OST_EC_OSPM_EJECT);
+        status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
         if (ACPI_SUCCESS(status))
                 return count;
 
         put_device(&acpi_device->dev);
-        acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
-                                  ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
+        acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
+                          ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
         return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
 }
 
@@ -1114,14 +1118,16 @@ static void acpi_scan_drop_device(acpi_handle handle, void *context)
         mutex_unlock(&acpi_device_del_lock);
 }
 
-int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device,
+                                void (*callback)(void *))
 {
         acpi_status status;
 
         if (!device)
                 return -EINVAL;
 
-        status = acpi_get_data(handle, acpi_scan_drop_device, (void **)device);
+        status = acpi_get_data_full(handle, acpi_scan_drop_device,
+                                    (void **)device, callback);
         if (ACPI_FAILURE(status) || !*device) {
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
                                   handle));
@@ -1129,8 +1135,32 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
         }
         return 0;
 }
+
+int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+{
+        return acpi_get_device_data(handle, device, NULL);
+}
 EXPORT_SYMBOL(acpi_bus_get_device);
 
+static void get_acpi_device(void *dev)
+{
+        if (dev)
+                get_device(&((struct acpi_device *)dev)->dev);
+}
+
+struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle)
+{
+        struct acpi_device *adev = NULL;
+
+        acpi_get_device_data(handle, &adev, get_acpi_device);
+        return adev;
+}
+
+void acpi_bus_put_acpi_device(struct acpi_device *adev)
+{
+        put_device(&adev->dev);
+}
+
 int acpi_device_add(struct acpi_device *device,
                     void (*release)(struct device *))
 {
@@ -1641,6 +1671,27 @@ bool acpi_bay_match(acpi_handle handle)
         return acpi_ata_match(phandle);
 }
 
+bool acpi_device_is_battery(struct acpi_device *adev)
+{
+        struct acpi_hardware_id *hwid;
+
+        list_for_each_entry(hwid, &adev->pnp.ids, list)
+                if (!strcmp("PNP0C0A", hwid->id))
+                        return true;
+
+        return false;
+}
+
+static bool is_ejectable_bay(struct acpi_device *adev)
+{
+        acpi_handle handle = adev->handle;
+
+        if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev))
+                return true;
+
+        return acpi_bay_match(handle);
+}
+
 /*
  * acpi_dock_match - see if an acpi object has a _DCK method
  */
@@ -1706,6 +1757,20 @@ static bool acpi_ibm_smbus_match(acpi_handle handle)
         return false;
 }
 
+static bool acpi_object_is_system_bus(acpi_handle handle)
+{
+        acpi_handle tmp;
+
+        if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) &&
+            tmp == handle)
+                return true;
+        if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) &&
+            tmp == handle)
+                return true;
+
+        return false;
+}
+
 static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
                                 int device_type)
 {
@@ -1757,8 +1822,10 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
                         acpi_add_id(pnp, ACPI_DOCK_HID);
                 else if (acpi_ibm_smbus_match(handle))
                         acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
-                else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
-                        acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
+                else if (list_empty(&pnp->ids) &&
+                         acpi_object_is_system_bus(handle)) {
+                        /* \_SB, \_TZ, LNXSYBUS */
+                        acpi_add_id(pnp, ACPI_BUS_HID);
                         strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
                         strcpy(pnp->device_class, ACPI_BUS_CLASS);
                 }
@@ -1941,33 +2008,23 @@ void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val)
         mutex_unlock(&acpi_scan_lock);
 }
 
-static void acpi_scan_init_hotplug(acpi_handle handle, int type)
+static void acpi_scan_init_hotplug(struct acpi_device *adev)
 {
-        struct acpi_device_pnp pnp = {};
         struct acpi_hardware_id *hwid;
-        struct acpi_scan_handler *handler;
 
-        INIT_LIST_HEAD(&pnp.ids);
-        acpi_set_pnp_ids(handle, &pnp, type);
-
-        if (!pnp.type.hardware_id)
-                goto out;
+        if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) {
+                acpi_dock_add(adev);
+                return;
+        }
+        list_for_each_entry(hwid, &adev->pnp.ids, list) {
+                struct acpi_scan_handler *handler;
 
-        /*
-         * This relies on the fact that acpi_install_notify_handler() will not
-         * install the same notify handler routine twice for the same handle.
-         */
-        list_for_each_entry(hwid, &pnp.ids, list) {
                 handler = acpi_scan_match_handler(hwid->id, NULL);
                 if (handler) {
-                        acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
-                                        acpi_hotplug_notify_cb, handler);
+                        adev->flags.hotplug_notify = true;
                         break;
                 }
         }
-
-out:
-        acpi_free_pnp_ids(&pnp);
 }
 
 static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
@@ -1991,12 +2048,12 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
                 return AE_OK;
         }
 
-        acpi_scan_init_hotplug(handle, type);
-
         acpi_add_single_object(&device, handle, type, sta);
         if (!device)
                 return AE_CTRL_DEPTH;
 
+        acpi_scan_init_hotplug(device);
+
  out:
         if (!*return_value)
                 *return_value = device;
@@ -2015,13 +2072,14 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
 
                 handler = acpi_scan_match_handler(hwid->id, &devid);
                 if (handler) {
+                        device->handler = handler;
                         ret = handler->attach(device, devid);
-                        if (ret > 0) {
-                                device->handler = handler;
+                        if (ret > 0)
                                 break;
-                        } else if (ret < 0) {
+
+                        device->handler = NULL;
+                        if (ret < 0)
                                 break;
-                        }
                 }
         }
         return ret;
@@ -2030,8 +2088,12 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
 static void acpi_bus_attach(struct acpi_device *device)
 {
         struct acpi_device *child;
+        acpi_handle ejd;
         int ret;
 
+        if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd)))
+                register_dock_dependent_device(device, ejd);
+
         acpi_bus_get_status(device);
         /* Skip devices that are not present. */
         if (!acpi_device_is_present(device)) {
@@ -2184,7 +2246,6 @@ int __init acpi_scan_init(void)
         acpi_cmos_rtc_init();
         acpi_container_init();
         acpi_memory_hotplug_init();
-        acpi_dock_init();
 
         mutex_lock(&acpi_scan_lock);
         /*