[PATCH 10/20] tile PCI DMA: handle a NULL dev argument properly

[Chris Metcalf]

Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
---
 arch/tile/kernel/pci-dma.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c
index 7e98371..d16cfc1 100644
--- a/arch/tile/kernel/pci-dma.c
+++ b/arch/tile/kernel/pci-dma.c
@@ -36,8 +36,9 @@ static void *tile_dma_alloc_coherent(struct device *dev, size_t size,
 				     dma_addr_t *dma_handle, gfp_t gfp,
 				     struct dma_attrs *attrs)
 {
-	u64 dma_mask = dev->coherent_dma_mask ?: DMA_BIT_MASK(32);
-	int node = dev_to_node(dev);
+	u64 dma_mask = (dev && dev->coherent_dma_mask) ?
+		dev->coherent_dma_mask : DMA_BIT_MASK(32);
+	int node = dev ? dev_to_node(dev) : 0;
 	int order = get_order(size);
 	struct page *pg;
 	dma_addr_t addr;
-- 
1.8.3.1

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