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[media] uvcvideo: Fix alternate setting selection 

The alternate setting number is not equal to the alternate setting index
in the interface alternate settings table. Use the alternate setting
number from the interface descriptor when calling usb_set_interface().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-06-21 06:35:04 -03:00 committed by Mauro Carvalho Chehab
parent c854a48a97
commit 4807063faa
1 changed files with 1 additions and 1 deletions
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2
drivers/media/video/uvc/uvc_video.c
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@ -1598,7 +1598,7 @@ static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags)
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
if (psize >= bandwidth && psize <= best_psize) {
altsetting = i;
altsetting = alts->desc.bAlternateSetting;
best_psize = psize;
best_ep = ep;
}