Calls to dma_map_sg may return segments / entries than requested
if they fall on page bounderies. The old implementation did not
support this use case.
Signed-off-by: Shane Francis <bigbeesh...@gmail.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index dee446278417..d07f143b50c3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -974,12 +974,13 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
/* Map SG to device */
r = -ENOMEM;
nents = dma_map_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
- if (nents != ttm->sg->nents)
+ if (nents == 0)
goto release_sg;
/* convert SG to linear array of pages and dma addresses */
- drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
- gtt->ttm.dma_address, ttm->num_pages);
+ drm_prime_dma_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
+ gtt->ttm.dma_address, ttm->num_pages,
+ nents);
return 0;
--
2.26.0
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