| commit | 42e67b479eab6d26459b80b4867298232b0435e7 | [log] [tgz] |
|---|---|---|
| author | Shane Francis <bigbeeshane@gmail.com> | Wed Mar 25 09:07:39 2020 +0000 |
| committer | Alex Deucher <alexander.deucher@amd.com> | Wed Mar 25 12:01:23 2020 -0400 |
| tree | 5b497900fd7350ff51c89e623f5d4ab5760c2700 | |
| parent | b216a8e7908cd750550c0480cf7d2b3a37f06954 [diff] |
drm/prime: use dma length macro when mapping sg
As dma_map_sg can reorganize scatter-gather lists in a
way that can cause some later segments to be empty we should
always use the sg_dma_len macro to fetch the actual length.
This could now be 0 and not need to be mapped to a page or
address array
Fixes: be62dbf554c5 ("iommu/amd: Convert AMD iommu driver to the dma-iommu api")
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=206461
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=206895
Bug: https://gitlab.freedesktop.org/drm/amd/issues/1056
Signed-off-by: Shane Francis <bigbeeshane@gmail.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200325090741.21957-2-bigbeeshane@gmail.com
Cc: stable@vger.kernel.org