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Subject[PATCH] dma-mapping: fix flags in dma_alloc_wc
Date
We really need the writecombine flag in dma_alloc_wc, fix a stupid
oversight.

Fixes: 7ed1d91a9e ("dma-mapping: translate __GFP_NOFAIL to DMA_ATTR_NO_WARN")
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/dma-mapping.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 15bd41447025..d327bdd53716 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -796,7 +796,7 @@ static inline void dmam_release_declared_memory(struct device *dev)
static inline void *dma_alloc_wc(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t gfp)
{
- unsigned long attrs = DMA_ATTR_NO_WARN;
+ unsigned long attrs = DMA_ATTR_WRITE_COMBINE;

if (gfp & __GFP_NOWARN)
attrs |= DMA_ATTR_NO_WARN;
--
2.19.2
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