drm/amdgpu: sanitize fence numbers (4f399a08) · Commits · 戴 / test

Looks like the VCE block sometimes still sends nonsense fence numbers on startup. Signed-off-by:

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -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)