Messages in this thread Patch in this message | | | From | Glauber Costa <> | Subject | [PATCH 27/28] x86: don't do dma if mask is NULL. | Date | Tue, 8 Apr 2008 13:21:09 -0300 |
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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 <gcosta@redhat.com> --- 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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