Commit dbed452a authored by David Rientjes's avatar David Rientjes Committed by Christoph Hellwig
Browse files

dma-pool: decouple DMA_REMAP from DMA_COHERENT_POOL 



DMA_REMAP is an unnecessary requirement for AMD SEV, which requires
DMA_COHERENT_POOL, so avoid selecting it when it is otherwise unnecessary.

The only other requirement for DMA coherent pools is DMA_DIRECT_REMAP, so
ensure that properly selects the config option when needed.

Fixes: 82fef0ad ("x86/mm: unencrypted non-blocking DMA allocations use coherent pools")
Reported-by: default avatarAlex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Tested-by: default avatarAlex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 3ee06a6d

kernel/dma/Kconfig

+5 −5
Original line number Diff line number Diff line
@@ -73,18 +73,18 @@ config SWIOTLB 
config DMA_NONCOHERENT_MMAP

	bool



config DMA_COHERENT_POOL

	bool



config DMA_REMAP

	bool

	depends on MMU

	select GENERIC_ALLOCATOR

	select DMA_NONCOHERENT_MMAP

	bool



config DMA_COHERENT_POOL

	bool

	select DMA_REMAP



config DMA_DIRECT_REMAP

	bool

	select DMA_REMAP

	select DMA_COHERENT_POOL



config DMA_CMA

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