convert swiotlb to use dma_get_mask

swiotlb can use dma_get_mask() instead of the homegrown function.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: tony.luck@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 0dba7433af18..ba9114ec5d3a 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -65,7 +65,7 @@ static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
 
 static inline u64 dma_get_mask(struct device *dev)
 {
-        if (dev->dma_mask && *dev->dma_mask)
+        if (dev && dev->dma_mask && *dev->dma_mask)
                 return *dev->dma_mask;
         return DMA_32BIT_MASK;
 }