dma-mapping: fix inverted logic in dma_supported

The cleanup in commit 356da6d0cde3 ("dma-mapping: bypass indirect calls
for dma-direct") accidentally inverted the logic in the check for the
presence of a ->dma_supported() callback. Switch this back to the way it
was to prevent a crash on boot.

Fixes: 356da6d0cde3 ("dma-mapping: bypass indirect calls for dma-direct")
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index fc84c81..d7c34d2 100644 (file)
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -406,7 +406,7 @@ int dma_supported(struct device *dev, u64 mask)
 
        if (dma_is_direct(ops))
                return dma_direct_supported(dev, mask);
-       if (ops->dma_supported)
+       if (!ops->dma_supported)
                return 1;
        return ops->dma_supported(dev, mask);
 }