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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-04-25 00:35:04 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-06-03 11:53:04 +0300
commit13dcc7fc5f662a8c00eff5dce689c81231b5216e (patch)
treeca48381eec14ff93b20afdb08612bfe44172971e /test/v4l2_videodevice
parentc44457957e04b4aba18849c94b51c6a69e6801b3 (diff)
test: fence: Fix race condition
The fence test is racy, as it relies on the main loop being executed between completion of request signalledRequestId_ and signalledRequestId_ + 1. This usually happens, but is not guaranteed. To fix the race condition, change the request identification logic by replacing usage of the cookie value, which is zero-based and wraps around at nbuffers_ - 1, with a completed request counter that is one-based and doesn't wrap. The completedRequestId_, expiredRequestId_ and signalledRequestId_ variables now track the identifier of the last request that has completed, the request whose fence will time out, and the request whose fence will be signalled. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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