arm64/iommu: handle non-remapped addresses in ->mmap and ->get_sgtable

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DMA allocations that can't sleep may return non-remapped addresses, but
we do not properly handle them in the mmap and get_sgtable methods.
Resolve non-vmalloc addresses using virt_to_page to handle this corner
case.

Cc: <stable@vger.kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Christoph Hellwig 2019-04-30 06:51:50 -04:00 • committed by Will Deacon

parent b33f908811

commit a98d9ae937

1 changed files with 10 additions and 0 deletions

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arch/arm64/mm/dma-mapping.c

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