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Fix for one swiotlb regression in 2.16 from Takashi.

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Merge tag 'dma-mapping-4.17-2' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:
 "Fix for one swiotlb regression in 2.16 from Takashi"

* tag 'dma-mapping-4.17-2' of git://git.infradead.org/users/hch/dma-mapping:
  swiotlb: fix unexpected swiotlb_alloc_coherent failures
This commit is contained in:
Linus Torvalds 2018-04-12 11:00:48 -07:00
commit c5c177c5fd
1 changed files with 1 additions and 1 deletions
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2
lib/swiotlb.c
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@ -719,7 +719,7 @@ swiotlb_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle,
goto out_warn;
*dma_handle = __phys_to_dma(dev, phys_addr);
if (dma_coherent_ok(dev, *dma_handle, size))
if (!dma_coherent_ok(dev, *dma_handle, size))
goto out_unmap;
memset(phys_to_virt(phys_addr), 0, size);