Do not divide by zero.

If only one buffer was processed the performance measurement calculation
caused a division by zero. Do not do show measurements if they are bad.

Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/yavta.c b/yavta.c
index 1b9a7ff..f8dfed6 100644
--- a/yavta.c
+++ b/yavta.c
@@ -882,6 +882,9 @@ static int video_do_capture(struct device *dev, unsigned int nframes,
 	/* Stop streaming. */
 	video_enable(dev, 0);
 
+	if (end.tv_sec == start.tv_sec && end.tv_usec == start.tv_usec)
+		goto done;
+
 	end.tv_sec -= start.tv_sec;
 	end.tv_usec -= start.tv_usec;
 	if (end.tv_usec < 0) {