dma-direct: reject highmem pages from dma_alloc_from_contiguous

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dma_alloc_from_contiguous can return highmem pages depending on the
setup, which a plain non-remapping DMA allocator can't handle.  Detect
this case and fail the allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

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Christoph Hellwig 2018-09-22 20:47:26 +02:00

parent b18814e767

commit 704f2c20ea

1 changed files with 12 additions and 0 deletions

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kernel/dma/direct.c

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