diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2021-10-18 00:50:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-21 13:58:24 +0300 |
| commit | 38db3716a5f8f022ae38f7431913e6b479015b74 (patch) | |
| tree | b4513faec11a50a5a9f9e352e3b16afc2dbc90fb /drivers | |
| parent | e6bab2b66329b40462fb1bed6f98bc3fcf543a1c (diff) | |
| download | linux-38db3716a5f8f022ae38f7431913e6b479015b74.tar.xz | |
usb: gadget: uvc: test if ep->desc is valid on ep_queue
The reason that the ep_queue has failed could be a disabled endpoint.
In that case it is not guaranteed that the ep->desc is still valid.
This patch adds a check for NULL.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20211017215017.18392-4-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/function/uvc_video.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index f3e97a4fc030..4222192fa624 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -199,9 +199,12 @@ static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req) uvcg_err(&video->uvc->func, "Failed to queue request (%d).\n", ret); - /* Isochronous endpoints can't be halted. */ - if (usb_endpoint_xfer_bulk(video->ep->desc)) - usb_ep_set_halt(video->ep); + /* If the endpoint is disabled the descriptor may be NULL. */ + if (video->ep->desc) { + /* Isochronous endpoints can't be halted. */ + if (usb_endpoint_xfer_bulk(video->ep->desc)) + usb_ep_set_halt(video->ep); + } } return ret; |