Merge tag 'v3.10' into next

Merge 3.10 in order to get some of the last minute powerpc
changes, resolve conflicts and add additional fixes on top
of them.

7 files changed, 151 insertions, 94 deletions

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 652fd5c..cab13f2 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -164,15 +164,24 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
 	if (dev_desc->clk_required) {
 		ret = register_device_clock(adev, pdata);
 		if (ret) {
-			/*
-			 * Skip the device, but don't terminate the namespace
-			 * scan.
-			 */
-			kfree(pdata);
-			return 0;
+			/* Skip the device, but continue the namespace scan. */
+			ret = 0;
+			goto err_out;
 		}
 	}
 
+	/*
+	 * This works around a known issue in ACPI tables where LPSS devices
+	 * have _PS0 and _PS3 without _PSC (and no power resources), so
+	 * acpi_bus_init_power() will assume that the BIOS has put them into D0.
+	 */
+	ret = acpi_device_fix_up_power(adev);
+	if (ret) {
+		/* Skip the device, but continue the namespace scan. */
+		ret = 0;
+		goto err_out;
+	}
+
 	adev->driver_data = pdata;
 	ret = acpi_create_platform_device(adev, id);
 	if (ret > 0)
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 318fa32..31c217a 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -290,6 +290,26 @@ int acpi_bus_init_power(struct acpi_device *device)
 	return 0;
 }
 
+/**
+ * acpi_device_fix_up_power - Force device with missing _PSC into D0.
+ * @device: Device object whose power state is to be fixed up.
+ *
+ * Devices without power resources and _PSC, but having _PS0 and _PS3 defined,
+ * are assumed to be put into D0 by the BIOS.  However, in some cases that may
+ * not be the case and this function should be used then.
+ */
+int acpi_device_fix_up_power(struct acpi_device *device)
+{
+	int ret = 0;
+
+	if (!device->power.flags.power_resources
+	    && !device->power.flags.explicit_get
+	    && device->power.state == ACPI_STATE_D0)
+		ret = acpi_dev_pm_explicit_set(device, ACPI_STATE_D0);
+
+	return ret;
+}
+
 int acpi_bus_update_power(acpi_handle handle, int *state_p)
 {
 	struct acpi_device *device;
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 4fdea38..14de9f4 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -66,20 +66,21 @@ struct dock_station {
 	spinlock_t dd_lock;
 	struct mutex hp_lock;
 	struct list_head dependent_devices;
-	struct list_head hotplug_devices;
 
 	struct list_head sibling;
 	struct platform_device *dock_device;
 };
 static LIST_HEAD(dock_stations);
 static int dock_station_count;
+static DEFINE_MUTEX(hotplug_lock);
 
 struct dock_dependent_device {
 	struct list_head list;
-	struct list_head hotplug_list;
 	acpi_handle handle;
-	const struct acpi_dock_ops *ops;
-	void *context;
+	const struct acpi_dock_ops *hp_ops;
+	void *hp_context;
+	unsigned int hp_refcount;
+	void (*hp_release)(void *);
 };
 
 #define DOCK_DOCKING	0x00000001
@@ -111,7 +112,6 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 
 	dd->handle = handle;
 	INIT_LIST_HEAD(&dd->list);
-	INIT_LIST_HEAD(&dd->hotplug_list);
 
 	spin_lock(&ds->dd_lock);
 	list_add_tail(&dd->list, &ds->dependent_devices);
@@ -121,35 +121,90 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 }
 
 /**
- * dock_add_hotplug_device - associate a hotplug handler with the dock station
- * @ds: The dock station
- * @dd: The dependent device struct
- *
- * Add the dependent device to the dock's hotplug device list
+ * dock_init_hotplug - Initialize a hotplug device on a docking station.
+ * @dd: Dock-dependent device.
+ * @ops: Dock operations to attach to the dependent device.
+ * @context: Data to pass to the @ops callbacks and @release.
+ * @init: Optional initialization routine to run after setting up context.
+ * @release: Optional release routine to run on removal.
  */
-static void
-dock_add_hotplug_device(struct dock_station *ds,
-			struct dock_dependent_device *dd)
+static int dock_init_hotplug(struct dock_dependent_device *dd,
+			     const struct acpi_dock_ops *ops, void *context,
+			     void (*init)(void *), void (*release)(void *))
 {
-	mutex_lock(&ds->hp_lock);
-	list_add_tail(&dd->hotplug_list, &ds->hotplug_devices);
-	mutex_unlock(&ds->hp_lock);
+	int ret = 0;
+
+	mutex_lock(&hotplug_lock);
+
+	if (dd->hp_context) {
+		ret = -EEXIST;
+	} else {
+		dd->hp_refcount = 1;
+		dd->hp_ops = ops;
+		dd->hp_context = context;
+		dd->hp_release = release;
+	}
+
+	if (!WARN_ON(ret) && init)
+		init(context);
+
+	mutex_unlock(&hotplug_lock);
+	return ret;
 }
 
 /**
- * dock_del_hotplug_device - remove a hotplug handler from the dock station
- * @ds: The dock station
- * @dd: the dependent device struct
+ * dock_release_hotplug - Decrement hotplug reference counter of dock device.
+ * @dd: Dock-dependent device.
  *
- * Delete the dependent device from the dock's hotplug device list
+ * Decrement the reference counter of @dd and if 0, detach its hotplug
+ * operations from it, reset its context pointer and run the optional release
+ * routine if present.
  */
-static void
-dock_del_hotplug_device(struct dock_station *ds,
-			struct dock_dependent_device *dd)
+static void dock_release_hotplug(struct dock_dependent_device *dd)
 {
-	mutex_lock(&ds->hp_lock);
-	list_del(&dd->hotplug_list);
-	mutex_unlock(&ds->hp_lock);
+	void (*release)(void *) = NULL;
+	void *context = NULL;
+
+	mutex_lock(&hotplug_lock);
+
+	if (dd->hp_context && !--dd->hp_refcount) {
+		dd->hp_ops = NULL;
+		context = dd->hp_context;
+		dd->hp_context = NULL;
+		release = dd->hp_release;
+		dd->hp_release = NULL;
+	}
+
+	if (release && context)
+		release(context);
+
+	mutex_unlock(&hotplug_lock);
+}
+
+static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event,
+			       bool uevent)
+{
+	acpi_notify_handler cb = NULL;
+	bool run = false;
+
+	mutex_lock(&hotplug_lock);
+
+	if (dd->hp_context) {
+		run = true;
+		dd->hp_refcount++;
+		if (dd->hp_ops)
+			cb = uevent ? dd->hp_ops->uevent : dd->hp_ops->handler;
+	}
+
+	mutex_unlock(&hotplug_lock);
+
+	if (!run)
+		return;
+
+	if (cb)
+		cb(dd->handle, event, dd->hp_context);
+
+	dock_release_hotplug(dd);
 }
 
 /**
@@ -360,9 +415,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
 	/*
 	 * First call driver specific hotplug functions
 	 */
-	list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
-		if (dd->ops && dd->ops->handler)
-			dd->ops->handler(dd->handle, event, dd->context);
+	list_for_each_entry(dd, &ds->dependent_devices, list)
+		dock_hotplug_event(dd, event, false);
 
 	/*
 	 * Now make sure that an acpi_device is created for each
@@ -398,9 +452,8 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
 	if (num == DOCK_EVENT)
 		kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
 
-	list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
-		if (dd->ops && dd->ops->uevent)
-			dd->ops->uevent(dd->handle, event, dd->context);
+	list_for_each_entry(dd, &ds->dependent_devices, list)
+		dock_hotplug_event(dd, event, true);
 
 	if (num != DOCK_EVENT)
 		kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
@@ -570,19 +623,24 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
  * @handle: the handle of the device
  * @ops: handlers to call after docking
  * @context: device specific data
+ * @init: Optional initialization routine to run after registration
+ * @release: Optional release routine to run on unregistration
  *
  * If a driver would like to perform a hotplug operation after a dock
  * event, they can register an acpi_notifiy_handler to be called by
  * the dock driver after _DCK is executed.
  */
-int
-register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops,
-			     void *context)
+int register_hotplug_dock_device(acpi_handle handle,
+				 const struct acpi_dock_ops *ops, void *context,
+				 void (*init)(void *), void (*release)(void *))
 {
 	struct dock_dependent_device *dd;
 	struct dock_station *dock_station;
 	int ret = -EINVAL;
 
+	if (WARN_ON(!context))
+		return -EINVAL;
+
 	if (!dock_station_count)
 		return -ENODEV;
 
@@ -597,12 +655,8 @@ register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops
 		 * ops
 		 */
 		dd = find_dock_dependent_device(dock_station, handle);
-		if (dd) {
-			dd->ops = ops;
-			dd->context = context;
-			dock_add_hotplug_device(dock_station, dd);
+		if (dd && !dock_init_hotplug(dd, ops, context, init, release))
 			ret = 0;
-		}
 	}
 
 	return ret;
@@ -624,7 +678,7 @@ void unregister_hotplug_dock_device(acpi_handle handle)
 	list_for_each_entry(dock_station, &dock_stations, sibling) {
 		dd = find_dock_dependent_device(dock_station, handle);
 		if (dd)
-			dock_del_hotplug_device(dock_station, dd);
+			dock_release_hotplug(dd);
 	}
 }
 EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
@@ -868,8 +922,10 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
 	if (!count)
 		return -EINVAL;
 
+	acpi_scan_lock_acquire();
 	begin_undock(dock_station);
 	ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST);
+	acpi_scan_lock_release();
 	return ret ? ret: count;
 }
 static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock);
@@ -951,7 +1007,6 @@ static int __init dock_add(acpi_handle handle)
 	mutex_init(&dock_station->hp_lock);
 	spin_lock_init(&dock_station->dd_lock);
 	INIT_LIST_HEAD(&dock_station->sibling);
-	INIT_LIST_HEAD(&dock_station->hotplug_devices);
 	ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
 	INIT_LIST_HEAD(&dock_station->dependent_devices);
 
@@ -992,30 +1047,6 @@ err_unregister:
 }
 
 /**
- * dock_remove - free up resources related to the dock station
- */
-static int dock_remove(struct dock_station *ds)
-{
-	struct dock_dependent_device *dd, *tmp;
-	struct platform_device *dock_device = ds->dock_device;
-
-	if (!dock_station_count)
-		return 0;
-
-	/* remove dependent devices */
-	list_for_each_entry_safe(dd, tmp, &ds->dependent_devices, list)
-		kfree(dd);
-
-	list_del(&ds->sibling);
-
-	/* cleanup sysfs */
-	sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group);
-	platform_device_unregister(dock_device);
-
-	return 0;
-}
-
-/**
  * find_dock_and_bay - look for dock stations and bays
  * @handle: acpi handle of a device
  * @lvl: unused
@@ -1033,7 +1064,7 @@ find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
 	return AE_OK;
 }
 
-static int __init dock_init(void)
+int __init acpi_dock_init(void)
 {
 	if (acpi_disabled)
 		return 0;
@@ -1052,19 +1083,3 @@ static int __init dock_init(void)
 		ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);
 	return 0;
 }
-
-static void __exit dock_exit(void)
-{
-	struct dock_station *tmp, *dock_station;
-
-	unregister_acpi_bus_notifier(&dock_acpi_notifier);
-	list_for_each_entry_safe(dock_station, tmp, &dock_stations, sibling)
-		dock_remove(dock_station);
-}
-
-/*
- * Must be called before drivers of devices in dock, otherwise we can't know
- * which devices are in a dock
- */
-subsys_initcall(dock_init);
-module_exit(dock_exit);
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 297cbf4..c610a76 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -40,6 +40,11 @@ void acpi_container_init(void);
 #else
 static inline void acpi_container_init(void) {}
 #endif
+#ifdef CONFIG_ACPI_DOCK
+void acpi_dock_init(void);
+#else
+static inline void acpi_dock_init(void) {}
+#endif
 #ifdef CONFIG_ACPI_HOTPLUG_MEMORY
 void acpi_memory_hotplug_init(void);
 #else
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index f962047..288bb27 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -885,6 +885,7 @@ int acpi_add_power_resource(acpi_handle handle)
 				ACPI_STA_DEFAULT);
 	mutex_init(&resource->resource_lock);
 	INIT_LIST_HEAD(&resource->dependent);
+	INIT_LIST_HEAD(&resource->list_node);
 	resource->name = device->pnp.bus_id;
 	strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
 	strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index a3868f6..3322b47 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -304,7 +304,8 @@ static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
 }
 
 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
-				     u8 triggering, u8 polarity, u8 shareable)
+				     u8 triggering, u8 polarity, u8 shareable,
+				     bool legacy)
 {
 	int irq, p, t;
 
@@ -317,14 +318,19 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 	 * In IO-APIC mode, use overrided attribute. Two reasons:
 	 * 1. BIOS bug in DSDT
 	 * 2. BIOS uses IO-APIC mode Interrupt Source Override
+	 *
+	 * We do this only if we are dealing with IRQ() or IRQNoFlags()
+	 * resource (the legacy ISA resources). With modern ACPI 5 devices
+	 * using extended IRQ descriptors we take the IRQ configuration
+	 * from _CRS directly.
 	 */
-	if (!acpi_get_override_irq(gsi, &t, &p)) {
+	if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
 		u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 		u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 
 		if (triggering != trig || polarity != pol) {
 			pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
-				   t ? "edge" : "level", p ? "low" : "high");
+				   t ? "level" : "edge", p ? "low" : "high");
 			triggering = trig;
 			polarity = pol;
 		}
@@ -373,7 +379,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 		}
 		acpi_dev_get_irqresource(res, irq->interrupts[index],
 					 irq->triggering, irq->polarity,
-					 irq->sharable);
+					 irq->sharable, true);
 		break;
 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 		ext_irq = &ares->data.extended_irq;
@@ -383,7 +389,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 		}
 		acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
 					 ext_irq->triggering, ext_irq->polarity,
-					 ext_irq->sharable);
+					 ext_irq->sharable, false);
 		break;
 	default:
 		return false;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index b14ac46..27da630 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2042,6 +2042,7 @@ int __init acpi_scan_init(void)
 	acpi_lpss_init();
 	acpi_container_init();
 	acpi_memory_hotplug_init();
+	acpi_dock_init();
 
 	mutex_lock(&acpi_scan_lock);
 	/*