This is a note to let you know that I've just added the patch titled Revert "usb: gadget: uvc: Add missing call for additional setup data" to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: revert-usb-gadget-uvc-add-missing-call-for-additional-setup-data.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From eb38d913c27f32f4df173791051fecf6aca34173 Mon Sep 17 00:00:00 2001 From: Roger Quadros <rogerq@xxxxxx> Date: Thu, 2 Mar 2017 10:44:58 +0200 Subject: Revert "usb: gadget: uvc: Add missing call for additional setup data" From: Roger Quadros <rogerq@xxxxxx> commit eb38d913c27f32f4df173791051fecf6aca34173 upstream. This reverts commit 4fbac5206afd01b717d4bdc58793d471f3391b4b. This commit breaks g_webcam when used with uvc-gadget [1]. The user space application (e.g. uvc-gadget) is responsible for sending response to UVC class specific requests on control endpoint in uvc_send_response() in uvc_v4l2.c. The bad commit was causing a duplicate response to be sent with incorrect response data thus causing UVC probe to fail at the host and broken control transfer endpoint at the gadget. [1] - git://git.ideasonboard.org/uvc-gadget.git Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Signed-off-by: Roger Quadros <rogerq@xxxxxx> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/gadget/function/f_uvc.c | 7 ------- 1 file changed, 7 deletions(-) --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -258,13 +258,6 @@ uvc_function_setup(struct usb_function * memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req)); v4l2_event_queue(&uvc->vdev, &v4l2_event); - /* Pass additional setup data to userspace */ - if (uvc->event_setup_out && uvc->event_length) { - uvc->control_req->length = uvc->event_length; - return usb_ep_queue(uvc->func.config->cdev->gadget->ep0, - uvc->control_req, GFP_ATOMIC); - } - return 0; } Patches currently in stable-queue which might be from rogerq@xxxxxx are queue-4.9/usb-dwc3-omap-fix-missing-break-in-dwc3_omap_set_mailbox.patch queue-4.9/revert-usb-gadget-uvc-add-missing-call-for-additional-setup-data.patch