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

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 47aeb04c1997..de7cc540450f 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -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);