From: Xiangliang Yu <xiangliang...@amd.com>
Wptr number should be align with buf_mask, otherwise will point
to wrong place.
Signed-off-by: Xiangliang Yu <xiangliang...@amd.com>
Signed-off-by: Monk Liu <monk....@amd.com>
Reviewed-by: Ken Wang <qingqing.w...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 8e5367d..ad82ab7 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3275,7 +3275,7 @@ static unsigned gfx_v9_0_ring_emit_init_cond_exec(struct
amdgpu_ring *ring)
amdgpu_ring_write(ring, lower_32_bits(ring->cond_exe_gpu_addr));
amdgpu_ring_write(ring, upper_32_bits(ring->cond_exe_gpu_addr));
amdgpu_ring_write(ring, 0); /* discard following DWs if
*cond_exec_gpu_addr==0 */
- ret = ring->wptr;
+ ret = ring->wptr & ring->buf_mask;
amdgpu_ring_write(ring, 0x55aa55aa); /* patch dummy value later */
return ret;
}
@@ -3283,9 +3283,10 @@ static unsigned gfx_v9_0_ring_emit_init_cond_exec(struct
amdgpu_ring *ring)
static void gfx_v9_0_ring_emit_patch_cond_exec(struct amdgpu_ring *ring,
unsigned offset)
{
unsigned cur;
+ BUG_ON(offset > ring->buf_mask);
BUG_ON(ring->ring[offset] != 0x55aa55aa);
- cur = ring->wptr - 1;
+ cur = (ring->wptr & ring->buf_mask) - 1;
if (likely(cur > offset))
ring->ring[offset] = cur - offset;
else
--
2.5.5
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