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>
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@ -29,7 +29,7 @@ pci_find_upstream_pcie_bridge(struct pci_dev *pdev)
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if (pdev->is_pcie)
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return NULL;
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while (1) {
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if (!pdev->bus->self)
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if (!pdev->bus->parent)
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break;
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pdev = pdev->bus->self;
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/* a p2p bridge */
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