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Commit f0fdabf8 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
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[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: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 639b421b

arch/x86_64/kernel/pci-nommu.c

+4 −3
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ static int 
check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)

{

        if (hwdev && bus + size > *hwdev->dma_mask) {

		if (*hwdev->dma_mask >= 0xffffffffULL)

			printk(KERN_ERR

			    "nommu_%s: overflow %Lx+%lu of device mask %Lx\n",

	       			name, (long long)bus, size, (long long)*hwdev->dma_mask);