On Thu, Sep 30, 2021 at 04:30:38AM +0300, Mike Rapoport wrote: > From: Mike Rapoport <r...@linux.ibm.com> > > 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.gc...@arm.com/ > Signed-off-by: Mike Rapoport <r...@linux.ibm.com>
We'll lose a bit of a sanity check with this, but given the problems it caused: Reviewed-by: Christoph Hellwig <h...@lst.de> _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
