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| author | Christoph Hellwig <hch@lst.de> | 2018-04-09 11:15:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-04-09 18:20:09 +0200 |
| commit | 66bdb1478fd1a66d5b8b81e4e28e0ed3df63ed37 (patch) | |
| tree | 1e561dbd5fc4f7c4cfa12786328fc8dbbffac236 /lib | |
| parent | 9a3b7e5e65c4b4d332df5f607c0838c3fb918673 (diff) | |
| download | linux-stable-66bdb1478fd1a66d5b8b81e4e28e0ed3df63ed37.tar.gz linux-stable-66bdb1478fd1a66d5b8b81e4e28e0ed3df63ed37.tar.bz2 linux-stable-66bdb1478fd1a66d5b8b81e4e28e0ed3df63ed37.zip | |
swiotlb: Use dma_direct_supported() for swiotlb_ops
swiotlb_alloc() calls dma_direct_alloc(), which can satisfy lower than 32-bit
DMA mask requests using GFP_DMA if the architecture supports it. Various
x86 drivers rely on that, so we need to support that. At the same time
the whole kernel expects a 32-bit DMA mask to just work, so the other magic
in swiotlb_dma_supported() isn't actually needed either.
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: iommu@lists.linux-foundation.org
Fixes: 6e4bf5867783 ("x86/dma: Use generic swiotlb_ops")
Link: http://lkml.kernel.org/r/20180409091517.6619-2-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/swiotlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index c43ec2271469..c67b06261160 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -1130,6 +1130,6 @@ const struct dma_map_ops swiotlb_dma_ops = { .unmap_sg = swiotlb_unmap_sg_attrs, .map_page = swiotlb_map_page, .unmap_page = swiotlb_unmap_page, - .dma_supported = swiotlb_dma_supported, + .dma_supported = dma_direct_supported, }; #endif /* CONFIG_DMA_DIRECT_OPS */ |