[Mesa-dev] [PATCH] mesa: don't wait in _mesa_ClientWaitSync if timeout is 0

[Eric Anholt]

Vadim Girlin <vadimgirlin at gmail.com> writes:

> From ARB_sync spec:
>
>     If the value of <timeout> is zero, then ClientWaitSync does not
>     block, but simply tests the current state of <sync>. TIMEOUT_EXPIRED
>     will be returned in this case if <sync> is not signaled, even though
>     no actual wait was performed.
>
> Fixes random fails of the arb_sync-timeout-zero piglit test on r600g.

We had similar failures.  Thanks!

Reviewed-by: Eric Anholt <eric at anholt.net>
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