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drm/amdgpu:fix ring_write_multiple

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ring_write_multiple should use buf_mask instead of ptr_mask

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Monk Liu 2017-03-23 16:10:04 +08:00 • committed by Alex Deucher
commit 5846e35569
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@ -1739,9 +1739,9 @@ static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring, void *sr
if (ring->count_dw < count_dw) {
DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
} else {
occupied = ring->wptr & ring->ptr_mask;
occupied = ring->wptr & ring->buf_mask;
dst = (void *)&ring->ring[occupied];
chunk1 = ring->ptr_mask + 1 - occupied;
chunk1 = ring->buf_mask + 1 - occupied;
chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
chunk2 = count_dw - chunk1;
chunk1 <<= 2;