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Marek Szyprowski authored
dma_alloc_*() buffers might be exposed to userspace via mmap() call, so they should be cleared on allocation. In case of IOMMU-based dma-mapping implementation such buffer clearing was missing in the code path for DMA_ATTR_FORCE_CONTIGUOUS flag handling, because dma_alloc_from_contiguous() doesn't honor __GFP_ZERO flag. This patch fixes this issue. For more information on clearing buffers allocated by dma_alloc_* functions, see commit 6829e274 ("arm64: dma-mapping: always clear allocated buffers"). Fixes: 44176bb3 ("arm64: Add support for DMA_ATTR_FORCE_CONTIGUOUS to IOMMU") Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com>
dd65a941