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| author | Christian König <ckoenig.leichtzumerken@gmail.com> | 2018-01-22 21:00:03 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-01-23 10:46:39 -0500 |
| commit | 5bffee867df7494ecd32c1e6ec4e8fc934c521b7 (patch) | |
| tree | a1f67f409659ef5dc2057553614ef7d944e6013f /drivers/dma-buf/reservation.c | |
| parent | 341a0ffceaa44660c43d219a3b2569ebbd7d3ad1 (diff) | |
| download | lwn-5bffee867df7494ecd32c1e6ec4e8fc934c521b7.tar.gz lwn-5bffee867df7494ecd32c1e6ec4e8fc934c521b7.zip | |
dma-buf: fix reservation_object_wait_timeout_rcu once more v2
We need to set shared_count even if we already have a fence to wait for.
v2: init i to -1 as well
Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180122200003.6665-1-christian.koenig@amd.com
Diffstat (limited to 'drivers/dma-buf/reservation.c')
| -rw-r--r-- | drivers/dma-buf/reservation.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c index b759a569b7b8..04ebe2204c12 100644 --- a/drivers/dma-buf/reservation.c +++ b/drivers/dma-buf/reservation.c @@ -471,13 +471,15 @@ long reservation_object_wait_timeout_rcu(struct reservation_object *obj, unsigned long timeout) { struct dma_fence *fence; - unsigned seq, shared_count, i = 0; + unsigned seq, shared_count; long ret = timeout ? timeout : 1; + int i; retry: shared_count = 0; seq = read_seqcount_begin(&obj->seq); rcu_read_lock(); + i = -1; fence = rcu_dereference(obj->fence_excl); if (fence && !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) { @@ -493,14 +495,14 @@ retry: fence = NULL; } - if (!fence && wait_all) { + if (wait_all) { struct reservation_object_list *fobj = rcu_dereference(obj->fence); if (fobj) shared_count = fobj->shared_count; - for (i = 0; i < shared_count; ++i) { + for (i = 0; !fence && i < shared_count; ++i) { struct dma_fence *lfence = rcu_dereference(fobj->shared[i]); if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, |