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| author | Maciej W. Rozycki <[email protected]> | 2018-11-01 07:54:24 +0000 |
|---|---|---|
| committer | Paul Burton <[email protected]> | 2018-11-05 18:08:13 +0000 |
| commit | d01501f85249848a2497968d46dd46d5c6fe32e6 (patch) | |
| tree | 1220e311780a26fe3c3c69c662dc76d014c47722 /drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | |
| parent | MIPS: OCTEON: fix out of bounds array access on CN68XX (diff) | |
| download | kernel-d01501f85249848a2497968d46dd46d5c6fe32e6.tar.gz kernel-d01501f85249848a2497968d46dd46d5c6fe32e6.zip | |
MIPS: Fix `dma_alloc_coherent' returning a non-coherent allocation
Fix a MIPS `dma_alloc_coherent' regression from commit bc3ec75de545
("dma-mapping: merge direct and noncoherent ops") that causes a cached
allocation to be returned on noncoherent cache systems.
This is due to an inverted check now used in the MIPS implementation of
`arch_dma_alloc' on the result from `dma_direct_alloc_pages' before
doing the cached-to-uncached mapping of the allocation address obtained.
The mapping has to be done for a non-NULL rather than NULL result,
because a NULL result means the allocation has failed.
Invert the check for correct operation then.
Signed-off-by: Maciej W. Rozycki <[email protected]>
Signed-off-by: Paul Burton <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Fixes: bc3ec75de545 ("dma-mapping: merge direct and noncoherent ops")
Patchwork: https://patchwork.linux-mips.org/patch/20965/
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c')
0 files changed, 0 insertions, 0 deletions