MIPS: dma-default: Defend against NULL dev in massage_gfp_flags

[cascardo/linux.git] / arch / mips / mm / dma-default.c

diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 730d394..cb557d2 100644 (file)
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -88,19 +88,20 @@ static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
        else
 #endif
 #if defined(CONFIG_ZONE_DMA32) && defined(CONFIG_ZONE_DMA)
-            if (dev->coherent_dma_mask < DMA_BIT_MASK(32))
+            if (dev == NULL || dev->coherent_dma_mask < DMA_BIT_MASK(32))
                        dma_flag = __GFP_DMA;
        else if (dev->coherent_dma_mask < DMA_BIT_MASK(64))
                        dma_flag = __GFP_DMA32;
        else
 #endif
 #if defined(CONFIG_ZONE_DMA32) && !defined(CONFIG_ZONE_DMA)
-            if (dev->coherent_dma_mask < DMA_BIT_MASK(64))
+            if (dev == NULL || dev->coherent_dma_mask < DMA_BIT_MASK(64))
                dma_flag = __GFP_DMA32;
        else
 #endif
 #if defined(CONFIG_ZONE_DMA) && !defined(CONFIG_ZONE_DMA32)
-            if (dev->coherent_dma_mask < DMA_BIT_MASK(sizeof(phys_addr_t) * 8))
+            if (dev == NULL ||
+                dev->coherent_dma_mask < DMA_BIT_MASK(sizeof(phys_addr_t) * 8))
                dma_flag = __GFP_DMA;
        else
 #endif