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>
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 0dba743..ba9114e 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -65,7 +65,7 @@
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;
}
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 240a67c..f8eebd48 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -276,11 +276,7 @@
static int
address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
{
- dma_addr_t mask = 0xffffffff;
- /* If the device has a mask, use it, otherwise default to 32 bits */
- if (hwdev && hwdev->dma_mask)
- mask = *hwdev->dma_mask;
- return !is_buffer_dma_capable(mask, addr, size);
+ return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
}
static int is_swiotlb_buffer(char *addr)