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Revert "usb: gadget: uvc: Add missing call for additional setup data" 

This reverts commit 4fbac5206a.

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

Cc: <stable@vger.kernel.org> # v4.9+
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Roger Quadros 2017-03-02 10:44:58 +02:00 committed by Felipe Balbi
parent cf3113d893
commit eb38d913c2
1 changed files with 0 additions and 7 deletions
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7
drivers/usb/gadget/function/f_uvc.c
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@ -258,13 +258,6 @@ uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
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;
}