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Message-Id: <20070815004034.4AB7814DC8@wotan.suse.de> Date: Wed, 15 Aug 2007 02:40:34 +0200 (CEST) From: Andi Kleen <ak@...e.de> To: patches@...-64.org, linux-kernel@...r.kernel.org, torvalds@...l.org Subject: [PATCH] [1/4] x86_64: Fail dma_alloc_coherent on dma less devices This should fix an oops with PCMCIA PATA devices http://bugzilla.kernel.org/show_bug.cgi?id=8424 This is not a full fix for the problem, but probably still the right thing to do. Signed-off-by: Andi Kleen <ak@...e.de> --- arch/x86_64/kernel/pci-dma.c | 4 ++++ 1 file changed, 4 insertions(+) Index: linux/arch/x86_64/kernel/pci-dma.c =================================================================== --- linux.orig/arch/x86_64/kernel/pci-dma.c +++ linux/arch/x86_64/kernel/pci-dma.c @@ -82,6 +82,10 @@ dma_alloc_coherent(struct device *dev, s if (dma_mask == 0) dma_mask = DMA_32BIT_MASK; + /* Device not DMA able */ + if (dev->dma_mask == NULL) + return NULL; + /* Don't invoke OOM killer */ gfp |= __GFP_NORETRY; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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