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[PATCH] x86_64: Check for too many northbridges in IOMMU code

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The IOMMU code can only deal with 8 northbridges. Error out when
more are found.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-05-08 15:17:19 +02:00
committed by Linus Torvalds
parent e0c1e9bf81
commit 5192d84e4c
1 changed files with 8 additions and 0 deletions
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8
arch/x86_64/kernel/pci-gart.c
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@@ -639,6 +639,14 @@ static int __init pci_iommu_init(void)
return -1; return -1;
} }
i = 0;
for_all_nb(dev)
i++;
if (i > MAX_NB) {
printk(KERN_ERR "PCI-GART: Too many northbridges (%ld). Disabled\n", i);
return -1;
}
printk(KERN_INFO "PCI-DMA: using GART IOMMU.\n"); printk(KERN_INFO "PCI-DMA: using GART IOMMU.\n");
aper_size = info.aper_size * 1024 * 1024; aper_size = info.aper_size * 1024 * 1024;
iommu_size = check_iommu_size(info.aper_base, aper_size); iommu_size = check_iommu_size(info.aper_base, aper_size);