sorry, paste a wrong patch. will send out v2.
> 2020年2月23日 19:56，Pan, Xinhui <Xinhui.Pan@xxxxxxx> 写道：
>
> If shared fence list is not empty, even we want to test all fences, excl fence is ignored.
> That is abviously wrong, so fix it.
>
> Signed-off-by: xinhui pan <xinhui.pan@xxxxxxx>
> ---
> drivers/dma-buf/dma-resv.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
> index 4264e64788c4..44dc64c547c6 100644
> --- a/drivers/dma-buf/dma-resv.c
> +++ b/drivers/dma-buf/dma-resv.c
> @@ -632,14 +632,14 @@ static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
> */
> bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all)
> {
> - unsigned seq, shared_count;
> + unsigned int seq, shared_count, left;
> int ret;
>
> rcu_read_lock();
> retry:
> ret = true;
> shared_count = 0;
> - seq = read_seqcount_begin(&obj->seq);
> + left = seq = read_seqcount_begin(&obj->seq);
>
> if (test_all) {
> unsigned i;
> @@ -647,7 +647,7 @@ bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all)
> struct dma_resv_list *fobj = rcu_dereference(obj->fence);
>
> if (fobj)
> - shared_count = fobj->shared_count;
> + left = shared_count = fobj->shared_count;
>
> for (i = 0; i < shared_count; ++i) {
> struct dma_fence *fence = rcu_dereference(fobj->shared[i]);
> @@ -657,13 +657,14 @@ bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all)
> goto retry;
> else if (!ret)
> break;
> + left--;
> }
>
> if (read_seqcount_retry(&obj->seq, seq))
> goto retry;
> }
>
> - if (!shared_count) {
> + if (!left) {
> struct dma_fence *fence_excl = rcu_dereference(obj->fence_excl);
>
> if (fence_excl) {
> --
> 2.21.0 (Apple Git-122)
>
>
