merge: from v4l-dvb

2 files changed, 16 insertions, 4 deletions

diff --git a/linux/drivers/media/video/uvc/uvc_driver.c b/linux/drivers/media/video/uvc/uvc_driver.c
index 2c0b16960..f2b2983fe 100644
--- a/linux/drivers/media/video/uvc/uvc_driver.c
+++ b/linux/drivers/media/video/uvc/uvc_driver.c
@@ -1633,13 +1633,16 @@ static void uvc_disconnect(struct usb_interface *intf)
 	 * reference to the uvc_device instance after uvc_v4l2_open() received
 	 * the pointer to the device (video_devdata) but before it got the
 	 * chance to increase the reference count (kref_get).
+	 *
+	 * Note that the reference can't be released with the lock held,
+	 * otherwise a AB-BA deadlock can occur with videodev_lock that
+	 * videodev acquires in videodev_open() and video_unregister_device().
 	 */
 	mutex_lock(&uvc_driver.open_mutex);
-
 	dev->state |= UVC_DEV_DISCONNECTED;
-	kref_put(&dev->kref, uvc_delete);
-
 	mutex_unlock(&uvc_driver.open_mutex);
+
+	kref_put(&dev->kref, uvc_delete);
 }
 
 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
@@ -1826,6 +1829,15 @@ static struct usb_device_id uvc_ids[] = {
 	  .bInterfaceSubClass	= 1,
 	  .bInterfaceProtocol	= 0,
 	  .driver_info		= UVC_QUIRK_STREAM_NO_FID },
+	/* Asus F9SG */
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
+				| USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor		= 0x174f,
+	  .idProduct		= 0x8a31,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= UVC_QUIRK_STREAM_NO_FID },
 	/* Syntek (Asus U3S) */
 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
diff --git a/linux/drivers/media/video/uvc/uvc_v4l2.c b/linux/drivers/media/video/uvc/uvc_v4l2.c
index 0456bbdcd..b5a11eb8f 100644
--- a/linux/drivers/media/video/uvc/uvc_v4l2.c
+++ b/linux/drivers/media/video/uvc/uvc_v4l2.c
@@ -1032,7 +1032,7 @@ static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct video_device *vdev = video_devdata(file);
 	struct uvc_video_device *video = video_get_drvdata(vdev);
-	struct uvc_buffer *buffer;
+	struct uvc_buffer *uninitialized_var(buffer);
 	struct page *page;
 	unsigned long addr, start, size;
 	unsigned int i;