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[media] uvcvideo: Don't record timespec_sub 

The statistics function subtracts two timespecs manually. A helper is
provided by the kernel to do this.

Replace the implementation, using the helper.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Kieran Bingham 2017-04-03 08:25:31 -03:00 committed by Mauro Carvalho Chehab
parent 360a3a90c6
commit 52276df0b1
1 changed files with 2 additions and 8 deletions
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10
drivers/media/usb/uvc/uvc_video.c
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@ -868,14 +868,8 @@ size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
struct timespec ts;
size_t count = 0;
ts.tv_sec = stream->stats.stream.stop_ts.tv_sec
- stream->stats.stream.start_ts.tv_sec;
ts.tv_nsec = stream->stats.stream.stop_ts.tv_nsec
- stream->stats.stream.start_ts.tv_nsec;
if (ts.tv_nsec < 0) {
ts.tv_sec--;
ts.tv_nsec += 1000000000;
}
ts = timespec_sub(stream->stats.stream.stop_ts,
stream->stats.stream.start_ts);
/* Compute the SCR.SOF frequency estimate. At the nominal 1kHz SOF
* frequency this will not overflow before more than 1h.