Merge tag 'media/v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - honour privacy led with pdx86/int3472

 - fix invalid file access on cx18 and ivtv

 - forbid remove_bufs when legacy fileio is active on videbuf2

 - add an heuristic to find stream entity on uvcvideo

* tag 'media/v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: videobuf2: forbid remove_bufs when legacy fileio is active
  media: uvcvideo: Use heuristic to find stream entity
  media: v4l2-subdev / pdx86: int3472: Use "privacy" as con_id for the privacy LED
  media: ivtv: Fix invalid access to file *
  media: cx18: Fix invalid access to file *

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index fb6afb8e84f0..ee4f54d68349 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -167,13 +167,26 @@ static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
 
 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
 {
-	struct uvc_streaming *stream;
+	struct uvc_streaming *stream, *last_stream;
+	unsigned int count = 0;
 
 	list_for_each_entry(stream, &dev->streams, list) {
+		count += 1;
+		last_stream = stream;
 		if (stream->header.bTerminalLink == id)
 			return stream;
 	}
 
+	/*
+	 * If the streaming entity is referenced by an invalid ID, notify the
+	 * user and use heuristics to guess the correct entity.
+	 */
+	if (count == 1 && id == UVC_INVALID_ENTITY_ID) {
+		dev_warn(&dev->intf->dev,
+			 "UVC non compliance: Invalid USB header. The streaming entity has an invalid ID, guessing the correct one.");
+		return last_stream;
+	}
+
 	return NULL;
 }