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PCI: fix wrong assumption in pci_find_upstream_pcie_bridge 

Current pci_find_upstream_pcie_bridge() has a wrong assumption that
pci_bus->self is NULL on the root pci bus. But it might not true on
some platforms. Because of this wrong assumption, current
pci_find_upstream_pcie_bridge() might cause endless loop. We must
check pci_bus->parent instead.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2009-02-17 14:14:36 +09:00 committed by Jesse Barnes
parent d391f00f0e
commit 151ab36a2e
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/search.c
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@ -29,7 +29,7 @@ pci_find_upstream_pcie_bridge(struct pci_dev *pdev)
if (pdev->is_pcie) if (pdev->is_pcie)
return NULL; return NULL;
while (1) { while (1) {
if (!pdev->bus->self) if (!pdev->bus->parent)
break; break;
pdev = pdev->bus->self; pdev = pdev->bus->self;
/* a p2p bridge */ /* a p2p bridge */