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tile PCI DMA: handle a NULL dev argument properly

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Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2013-08-05 12:37:24 -04:00
parent cf89c4262b
commit 9b6846cede
1 changed files with 3 additions and 2 deletions
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5
arch/tile/kernel/pci-dma.c
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@ -36,8 +36,9 @@ static void *tile_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, dma_addr_t *dma_handle, gfp_t gfp,
struct dma_attrs *attrs) struct dma_attrs *attrs)
{ {
u64 dma_mask = dev->coherent_dma_mask ?: DMA_BIT_MASK(32); u64 dma_mask = (dev && dev->coherent_dma_mask) ?
int node = dev_to_node(dev); dev->coherent_dma_mask : DMA_BIT_MASK(32);
int node = dev ? dev_to_node(dev) : 0;
int order = get_order(size); int order = get_order(size);
struct page *pg; struct page *pg;
dma_addr_t addr; dma_addr_t addr;