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>
13dcc7fc5f