[PATCH] x86_64: Don't warn for overflow in nommu case when dma_mask is < 32bit
This triggers for b44's 1GB DMA workaround which tries to map first and then bounces. The 32bit heuristic is reasonable because the IOMMU doesn't attempt to handle < 32bit masks anyways. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -12,9 +12,10 @@ static int
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check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
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{
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if (hwdev && bus + size > *hwdev->dma_mask) {
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printk(KERN_ERR
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"nommu_%s: overflow %Lx+%lu of device mask %Lx\n",
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name, (long long)bus, size, (long long)*hwdev->dma_mask);
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if (*hwdev->dma_mask >= 0xffffffffULL)
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printk(KERN_ERR
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"nommu_%s: overflow %Lx+%lu of device mask %Lx\n",
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name, (long long)bus, size, (long long)*hwdev->dma_mask);
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return 0;
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}
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return 1;
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