From: Christian König Date: Fri, 24 Jun 2016 19:11:51 +0000 (+0200) Subject: drm/amdgpu: sanitize fence numbers X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4f399a082866e137cd3c3bdf329f5c7ce1dca5d7;p=linux-beck.git drm/amdgpu: sanitize fence numbers Looks like the VCE block sometimes still sends nonsense fence numbers on startup. Signed-off-by: Christian König Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index d1558768cfb7..e320b5b73ac6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -204,16 +204,22 @@ void amdgpu_fence_process(struct amdgpu_ring *ring) if (seq != ring->fence_drv.sync_seq) amdgpu_fence_schedule_fallback(ring); + last_seq &= drv->num_fences_mask; + seq &= drv->num_fences_mask; + while (last_seq != seq) { struct fence *fence, **ptr; - ptr = &drv->fences[++last_seq & drv->num_fences_mask]; + ++last_seq; + last_seq &= drv->num_fences_mask; + ptr = &drv->fences[last_seq]; /* There is always exactly one thread signaling this fence slot */ fence = rcu_dereference_protected(*ptr, 1); RCU_INIT_POINTER(*ptr, NULL); - BUG_ON(!fence); + if (!fence) + continue; r = fence_signal(fence); if (!r)