diff options
| author |   Jiadong.Zhu <Jiadong.Zhu@amd.com> | 2022-09-15 15:19:20 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2022-09-29 09:41:46 -0400 |
| commit | 415be17fb2f4a70afc827332c936955b801085ad (patch) | |
| tree | 4cc2537573469c6b2ad58fc84e39967feacc20dd /drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | |
| parent | drm/amd/display: Refactor LTTPR mode selection (diff) | |
| download | linux-dev-415be17fb2f4a70afc827332c936955b801085ad.tar.xz linux-dev-415be17fb2f4a70afc827332c936955b801085ad.zip | |
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: Christian König <christian.koenig@amd.com>
Signed-off-by: Jiadong.Zhu <Jiadong.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 34428e39649f..0320be4a5fc6 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -5429,7 +5429,7 @@ 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 |