Commit aef11279 authored by Michael Grzeschik's avatar Michael Grzeschik Committed by Greg Kroah-Hartman
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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: default avatarMichael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220402232744.3622565-4-m.grzeschik@pengutronix.de


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9b969f93

drivers/usb/gadget/function/uvc_video.c

+1 −1
Original line number Diff line number Diff line
@@ -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;