Re: [PATCH 1/2] dma-mapping: remove bogus test for pfn_valid from dma_map_resource
From: David Hildenbrand <hidden>
Date: 2021-09-30 07:27:11
Also in:
linux-iommu, lkml
On 30.09.21 03:30, Mike Rapoport wrote:
From: Mike Rapoport <redacted> dma_map_resource() uses pfn_valid() to ensure the range is not RAM. However, pfn_valid() only checks for availability of the memory map for a PFN but it does not ensure that the PFN is actually backed by RAM. As dma_map_resource() is the only method in DMA mapping APIs that has this check, simply drop the pfn_valid() test from dma_map_resource(). Link: https://lore.kernel.org/all/20210824173741.GC623@arm.com/ (local) Signed-off-by: Mike Rapoport <redacted> ---
Acked-by: David Hildenbrand <redacted> -- Thanks, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel