This is a note to let you know that I've just added the patch titled
usb: gadget: uvc: improve sg exit condition
to the 5.15-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:
usb-gadget-uvc-improve-sg-exit-condition.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From aef11279888c00e1841a3533a35d279285af3a51 Mon Sep 17 00:00:00 2001
From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
Date: Sun, 3 Apr 2022 01:27:44 +0200
Subject: usb: gadget: uvc: improve sg exit condition
From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
commit aef11279888c00e1841a3533a35d279285af3a51 upstream.
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@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220402232744.3622565-4-m.grzeschik@xxxxxxxxxxxxxx
Cc: Dan Vacura <w36195@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/function/uvc_video.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/gadget/function/uvc_video.c
+++ b/drivers/usb/gadget/function/uvc_video.c
@@ -126,7 +126,7 @@ uvc_video_encode_isoc_sg(struct usb_requ
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;
Patches currently in stable-queue which might be from m.grzeschik@xxxxxxxxxxxxxx are
queue-5.15/usb-gadget-uvc-improve-sg-exit-condition.patch
queue-5.15/usb-gadget-uvc-rework-uvcg_queue_next_buffer-to-uvcg_complete_buffer.patch
queue-5.15/usb-gadget-uvc-giveback-vb2-buffer-on-req-complete.patch
queue-5.15/usb-gadget-uvc-consistently-use-define-for-headerlen.patch
queue-5.15/usb-gadget-uvc-use-on-returned-header-len-in-video_encode_isoc_sg.patch
