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-rw-r--r--arch/x86_64/kernel/pci-gart.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index 9d3d76c85ae..2480d3f08a4 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -639,6 +639,14 @@ static int __init pci_iommu_init(void)
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");
aper_size = info.aper_size * 1024 * 1024;
iommu_size = check_iommu_size(info.aper_base, aper_size);