if the device hasn't provided a mask, abort allocation.
Note that we're using a fallback device now, so it does not cover
the case of a NULL device: just drivers passing NULL masks around.
Signed-off-by: Glauber Costa <[EMAIL PROTECTED]>
---
arch/x86/kernel/pci-dma_32.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index f134de3..d2f7074 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -91,6 +91,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
if (dma_mask == 0)
dma_mask = DMA_32BIT_MASK;
+ if (dev->dma_mask == NULL)
+ return NULL;
+
/* Don't invoke OOM killer */
gfp |= __GFP_NORETRY;
again:
--
1.5.0.6
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