Commit 151ab36a authored by Kenji Kaneshige's avatar Kenji Kaneshige Committed by Jesse Barnes

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: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent d391f00f
...@@ -29,7 +29,7 @@ pci_find_upstream_pcie_bridge(struct pci_dev *pdev) ...@@ -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 */
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment