Commit b3e45b18 authored by Jiadong.Zhu's avatar Jiadong.Zhu Committed by Alex Deucher
Browse files

drm/amdgpu: Correct the position in patch_cond_exec 



The current position calulated in gfx_v9_0_ring_emit_patch_cond_exec
underflows when the wptr is divisible by ring->buf_mask + 1.

Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarJiadong.Zhu <Jiadong.Zhu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 2d3907c1

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

+1 −1
Original line number Diff line number Diff line
@@ -5597,7 +5597,7 @@ static void gfx_v9_0_ring_emit_patch_cond_exec(struct amdgpu_ring *ring, unsigne 
	BUG_ON(offset > ring->buf_mask);

	BUG_ON(ring->ring[offset] != 0x55aa55aa);



	cur = (ring->wptr & ring->buf_mask) - 1;

	cur = (ring->wptr - 1) & ring->buf_mask;

	if (likely(cur > offset))

		ring->ring[offset] = cur - offset;

	else