media: uvcvideo: Remove redundant NULL assignment

jira LE-3615
Rebuild_History Non-Buildable kernel-5.14.0-570.28.1.el9_6
commit-author Ricardo Ribalda <[email protected]>
commit 04d3398

ctrl->handle will only be different than NULL for controls that have
mappings. This is because that assignment is only done inside
uvc_ctrl_set() for mapped controls.

	Cc: [email protected]
Fixes: e5225c8 ("media: uvcvideo: Send a control event when a Control Change interrupt arrives")
	Reviewed-by: Laurent Pinchart <[email protected]>
	Reviewed-by: Hans de Goede <[email protected]>
	Signed-off-by: Ricardo Ribalda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
	Signed-off-by: Laurent Pinchart <[email protected]>
	Signed-off-by: Mauro Carvalho Chehab <[email protected]>
(cherry picked from commit 04d3398)
	Signed-off-by: Jonathan Maple <[email protected]>

Author: PlaidCat

drivers/media/usb/uvc/uvc_ctrl.c

@@ -1640,10 +1640,8 @@ bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
 	struct uvc_device *dev = chain->dev;
 	struct uvc_ctrl_work *w = &dev->async_ctrl;
 
-	if (list_empty(&ctrl->info.mappings)) {
-		ctrl->handle = NULL;
+	if (list_empty(&ctrl->info.mappings))
 		return false;
-	}
 
 	w->data = data;
 	w->urb = urb;