Pull battery into release branch

[linux-2.6-omap-h63xx.git] / arch / x86_64 / kernel / pci-calgary.c

diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index ba16c968ca3f8a8a4f37c1862b1a9caa35261204..71da01e73f038162fe955181baad38f16de1126e 100644 (file)
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -367,16 +367,15 @@ static inline struct iommu_table *find_iommu_table(struct device *dev)
 
        pdev = to_pci_dev(dev);
 
-       /* is the device behind a bridge? */
-       if (unlikely(pdev->bus->parent))
-               pbus = pdev->bus->parent;
-       else
-               pbus = pdev->bus;
+       pbus = pdev->bus;
+
+       /* is the device behind a bridge? Look for the root bus */
+       while (pbus->parent)
+               pbus = pbus->parent;
 
        tbl = pci_iommu(pbus);
 
-       BUG_ON(pdev->bus->parent &&
-              (tbl->it_busno != pdev->bus->parent->number));
+       BUG_ON(tbl && (tbl->it_busno != pbus->number));
 
        return tbl;
 }