Merge commit 'v2.6.38' into x86/mm

Conflicts:
	arch/x86/mm/numa_64.c

Merge reason: Resolve the conflict, update the branch to .38.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

7 files changed, 108 insertions, 39 deletions

diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 54784bb42ce..edc25867ad9 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -416,10 +416,15 @@ struct acpi_gpe_handler_info {
 	u8 originally_enabled;  /* True if GPE was originally enabled */
 };
 
+struct acpi_gpe_notify_object {
+	struct acpi_namespace_node *node;
+	struct acpi_gpe_notify_object *next;
+};
+
 union acpi_gpe_dispatch_info {
 	struct acpi_namespace_node *method_node;	/* Method node for this GPE level */
 	struct acpi_gpe_handler_info *handler;  /* Installed GPE handler */
-	struct acpi_namespace_node *device_node;        /* Parent _PRW device for implicit notify */
+	struct acpi_gpe_notify_object device;   /* List of _PRW devices for implicit notify */
 };
 
 /*
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 14988a86066..f4725212eb4 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -457,6 +457,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 	acpi_status status;
 	struct acpi_gpe_event_info *local_gpe_event_info;
 	struct acpi_evaluate_info *info;
+	struct acpi_gpe_notify_object *notify_object;
 
 	ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
 
@@ -508,10 +509,18 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 		 * from this thread -- because handlers may in turn run other
 		 * control methods.
 		 */
-		status =
-		    acpi_ev_queue_notify_request(local_gpe_event_info->dispatch.
-						 device_node,
-						 ACPI_NOTIFY_DEVICE_WAKE);
+		status = acpi_ev_queue_notify_request(
+				local_gpe_event_info->dispatch.device.node,
+				ACPI_NOTIFY_DEVICE_WAKE);
+
+		notify_object = local_gpe_event_info->dispatch.device.next;
+		while (ACPI_SUCCESS(status) && notify_object) {
+			status = acpi_ev_queue_notify_request(
+					notify_object->node,
+					ACPI_NOTIFY_DEVICE_WAKE);
+			notify_object = notify_object->next;
+		}
+
 		break;
 
 	case ACPI_GPE_DISPATCH_METHOD:
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
index e9562a7cb2f..52aaff3df56 100644
--- a/drivers/acpi/acpica/evxfgpe.c
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -198,7 +198,9 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
 	acpi_status status = AE_BAD_PARAMETER;
 	struct acpi_gpe_event_info *gpe_event_info;
 	struct acpi_namespace_node *device_node;
+	struct acpi_gpe_notify_object *notify_object;
 	acpi_cpu_flags flags;
+	u8 gpe_dispatch_mask;
 
 	ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
 
@@ -212,37 +214,62 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
 
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		goto unlock_and_exit;
+	}
+
+	if (wake_device == ACPI_ROOT_OBJECT) {
+		goto out;
+	}
+
+	/*
+	 * If there is no method or handler for this GPE, then the
+	 * wake_device will be notified whenever this GPE fires (aka
+	 * "implicit notify") Note: The GPE is assumed to be
+	 * level-triggered (for windows compatibility).
+	 */
+	gpe_dispatch_mask = gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK;
+	if (gpe_dispatch_mask != ACPI_GPE_DISPATCH_NONE
+	    && gpe_dispatch_mask != ACPI_GPE_DISPATCH_NOTIFY) {
+		goto out;
+	}
+
 	/* Validate wake_device is of type Device */
 
 	device_node = ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
 	if (device_node->type != ACPI_TYPE_DEVICE) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
+		goto unlock_and_exit;
 	}
 
-	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+	if (gpe_dispatch_mask == ACPI_GPE_DISPATCH_NONE) {
+		gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY |
+					 ACPI_GPE_LEVEL_TRIGGERED);
+		gpe_event_info->dispatch.device.node = device_node;
+		gpe_event_info->dispatch.device.next = NULL;
+	} else {
+		/* There are multiple devices to notify implicitly. */
 
-	/* Ensure that we have a valid GPE number */
-
-	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
-	if (gpe_event_info) {
-		/*
-		 * If there is no method or handler for this GPE, then the
-		 * wake_device will be notified whenever this GPE fires (aka
-		 * "implicit notify") Note: The GPE is assumed to be
-		 * level-triggered (for windows compatibility).
-		 */
-		if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-		    ACPI_GPE_DISPATCH_NONE) {
-			gpe_event_info->flags =
-			    (ACPI_GPE_DISPATCH_NOTIFY |
-			     ACPI_GPE_LEVEL_TRIGGERED);
-			gpe_event_info->dispatch.device_node = device_node;
+		notify_object = ACPI_ALLOCATE_ZEROED(sizeof(*notify_object));
+		if (!notify_object) {
+			status = AE_NO_MEMORY;
+			goto unlock_and_exit;
 		}
 
-		gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
-		status = AE_OK;
+		notify_object->node = device_node;
+		notify_object->next = gpe_event_info->dispatch.device.next;
+		gpe_event_info->dispatch.device.next = notify_object;
 	}
 
+ out:
+	gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+	status = AE_OK;
+
+ unlock_and_exit:
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 	return_ACPI_STATUS(status);
 }
diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index 5df67f1d6c6..384f7abcff7 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -26,7 +26,9 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
 			size_t count, loff_t *ppos)
 {
 	static char *buf;
-	static int uncopied_bytes;
+	static u32 max_size;
+	static u32 uncopied_bytes;
+
 	struct acpi_table_header table;
 	acpi_status status;
 
@@ -37,19 +39,24 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
 		if (copy_from_user(&table, user_buf,
 				   sizeof(struct acpi_table_header)))
 			return -EFAULT;
-		uncopied_bytes = table.length;
-		buf = kzalloc(uncopied_bytes, GFP_KERNEL);
+		uncopied_bytes = max_size = table.length;
+		buf = kzalloc(max_size, GFP_KERNEL);
 		if (!buf)
 			return -ENOMEM;
 	}
 
-	if (uncopied_bytes < count) {
-		kfree(buf);
+	if (buf == NULL)
+		return -EINVAL;
+
+	if ((*ppos > max_size) ||
+	    (*ppos + count > max_size) ||
+	    (*ppos + count < count) ||
+	    (count > uncopied_bytes))
 		return -EINVAL;
-	}
 
 	if (copy_from_user(buf + (*ppos), user_buf, count)) {
 		kfree(buf);
+		buf = NULL;
 		return -EFAULT;
 	}
 
@@ -59,6 +66,7 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
 	if (!uncopied_bytes) {
 		status = acpi_install_method(buf);
 		kfree(buf);
+		buf = NULL;
 		if (ACPI_FAILURE(status))
 			return -EINVAL;
 		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b0931818cf9..c90c76aa7f8 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -636,17 +636,21 @@ EXPORT_SYMBOL(acpi_os_write_port);
 acpi_status
 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 {
-	u32 dummy;
 	void __iomem *virt_addr;
-	int size = width / 8, unmap = 0;
+	unsigned int size = width / 8;
+	bool unmap = false;
+	u32 dummy;
 
 	rcu_read_lock();
 	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
-	rcu_read_unlock();
 	if (!virt_addr) {
+		rcu_read_unlock();
 		virt_addr = acpi_os_ioremap(phys_addr, size);
-		unmap = 1;
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
 	}
+
 	if (!value)
 		value = &dummy;
 
@@ -666,6 +670,8 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 
 	if (unmap)
 		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
 
 	return AE_OK;
 }
@@ -674,14 +680,17 @@ acpi_status
 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 {
 	void __iomem *virt_addr;
-	int size = width / 8, unmap = 0;
+	unsigned int size = width / 8;
+	bool unmap = false;
 
 	rcu_read_lock();
 	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
-	rcu_read_unlock();
 	if (!virt_addr) {
+		rcu_read_unlock();
 		virt_addr = acpi_os_ioremap(phys_addr, size);
-		unmap = 1;
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
 	}
 
 	switch (width) {
@@ -700,6 +709,8 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 
 	if (unmap)
 		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
 
 	return AE_OK;
 }
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 42d3d72dae8..5af3479714f 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -82,6 +82,11 @@ long acpi_is_video_device(struct acpi_device *device)
 	if (!device)
 		return 0;
 
+	/* Is this device able to support video switching ? */
+	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) ||
+	    ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy)))
+		video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;
+
 	/* Is this device able to retrieve a video ROM ? */
 	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy)))
 		video_caps |= ACPI_VIDEO_ROM_AVAILABLE;
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index ed650145250..7bfbe40bc43 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -86,8 +86,12 @@ int __init acpi_wakeup_device_init(void)
 		struct acpi_device *dev = container_of(node,
 						       struct acpi_device,
 						       wakeup_list);
-		if (device_can_wakeup(&dev->dev))
+		if (device_can_wakeup(&dev->dev)) {
+			/* Button GPEs are supposed to be always enabled. */
+			acpi_enable_gpe(dev->wakeup.gpe_device,
+					dev->wakeup.gpe_number);
 			device_set_wakeup_enable(&dev->dev, true);
+		}
 	}
 	mutex_unlock(&acpi_device_lock);
 	return 0;