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reservation: wait only with non-zero timeout specified (v3) 

When the timeout value passed to reservation_object_wait_timeout_rcu
is zero, no wait should be done if the fences are not signaled.

Return '1' for idle and '0' for busy if the specified timeout is '0'
to keep consistent with the case of non-zero timeout.

v2: call fence_put if not signaled in the case of timeout==0

v3: switch to reservation_object_test_signaled_rcu

Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-By: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
This commit is contained in:
Jammy Zhou 2015-01-21 18:35:47 +08:00 committed by Sumit Semwal
parent b942c653ae
commit fb8b7d2b9d
1 changed files with 3 additions and 0 deletions
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3
drivers/dma-buf/reservation.c
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@ -327,6 +327,9 @@ long reservation_object_wait_timeout_rcu(struct reservation_object *obj,
unsigned seq, shared_count, i = 0;
long ret = timeout;
if (!timeout)
return reservation_object_test_signaled_rcu(obj, wait_all);
retry:
fence = NULL;
shared_count = 0;