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| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2022-04-03 01:27:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-21 18:15:33 +0200 |
| commit | aef11279888c00e1841a3533a35d279285af3a51 (patch) | |
| tree | 3d81dfaf993b1fc77633ca83588cb0f77bc9cc3d /drivers/usb/gadget/function | |
| parent | 9b969f93bcef9b3d9e92f1810e22bbd6c344a0e5 (diff) | |
| download | linux-aef11279888c00e1841a3533a35d279285af3a51.tar.bz2 | |
usb: gadget: uvc: improve sg exit condition
The exit condition to quit iterating over the sg_list, while encoding
the sg entries, has to consider the case that the dma_len of the entry
could be zero. This patch takes this condition to account.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220402232744.3622565-4-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget/function')
| -rw-r--r-- | drivers/usb/gadget/function/uvc_video.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index ceeabc4ba3b1..a9bb4553db84 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -155,7 +155,7 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, sg = sg_next(sg); for_each_sg(sg, iter, ureq->sgt.nents - 1, i) { - if (!len || !buf->sg) + if (!len || !buf->sg || !sg_dma_len(buf->sg)) break; sg_left = sg_dma_len(buf->sg) - buf->offset; |