Christoph Hellwig 33dcb37cef dma-mapping: fix page attributes for dma_mmap_* ... All the way back to introducing dma_common_mmap we've defaulted to mark the pages as uncached. But this is wrong for DMA coherent devices. Later on DMA_ATTR_WRITE_COMBINE also got incorrect treatment as that flag is only treated special on the alloc side for non-coherent devices. Introduce a new dma_pgprot helper that deals with the check for coherent devices so that only the remapping cases ever reach arch_dma_mmap_pgprot and we thus ensure no aliasing of page attributes happens, which makes the powerpc version of arch_dma_mmap_pgprot obsolete and simplifies the remaining ones. Note that this means arch_dma_mmap_pgprot is a bit misnamed now, but we'll phase it out soon. Fixes: 64ccc9c033 ("common: dma-mapping: add support for generic dma_mmap_* calls") Reported-by: Shawn Anastasio <shawn@anastas.io> Reported-by: Gavin Li <git@thegavinli.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> # arm64		2019-08-10 19:52:45 +02:00
..
coherent.c
contiguous.c	dma-contiguous: page-align the size in dma_free_contiguous()	2019-07-29 09:50:04 +03:00
debug.c
direct.c	dma-direct: don't truncate dma_required_mask to bus addressing capabilities	2019-08-10 19:52:45 +02:00
dummy.c	dma-mapping: factor out dummy DMA ops	2018-12-13 21:06:12 +01:00
Kconfig
Makefile
mapping.c	dma-mapping: fix page attributes for dma_mmap_*	2019-08-10 19:52:45 +02:00
remap.c	dma-mapping: fix page attributes for dma_mmap_*	2019-08-10 19:52:45 +02:00
swiotlb.c
virt.c	dma-mapping: zero memory returned from dma_alloc_*	2018-12-20 08:13:52 +01:00