ARM: dma-mapping: convert DMA direction into IOMMU protection attributes

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IOMMU mappings take a prot parameter, identifying the protection bits
to enforce on the newly created mapping (READ or WRITE). The ARM
dma-mapping framework currently just passes 0 as the prot argument,
resulting in faulting mappings.

This patch infers the protection attributes based on the direction of
the DMA transfer.

Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

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Will Deacon 2013-06-10 19:34:39 +01:00 • committed by Marek Szyprowski

parent 836bfa0d29

commit 13987d68bc

1 changed files with 16 additions and 2 deletions

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arch/arm/mm/dma-mapping.c

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