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| author | Max Krummenacher <max.krummenacher@toradex.com> | 2018-06-19 17:19:28 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2018-06-19 17:19:28 +0200 |
| commit | 731e809d3e4a14e49756bd4158b98c69e39a8459 (patch) | |
| tree | 66644c715500c88a6f6285cae57a6067f0ed8105 /drivers/pci/pcie/aspm.c | |
| parent | b2a7f2f2fd3ec48b3d309111b6fe8ddee227539d (diff) | |
| parent | 5b5a04065fb5487303869fd6080c30f86530005d (diff) | |
Merge branch 'fslc_4.9-1.0.x-imx' into toradex_4.9-1.0.x-imx-next
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index b0916b126923..6643a7bc381c 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -526,10 +526,14 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev) /* * Root Ports and PCI/PCI-X to PCIe Bridges are roots of PCIe - * hierarchies. + * hierarchies. Note that some PCIe host implementations omit + * the root ports entirely, in which case a downstream port on + * a switch may become the root of the link state chain for all + * its subordinate endpoints. */ if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT || - pci_pcie_type(pdev) == PCI_EXP_TYPE_PCIE_BRIDGE) { + pci_pcie_type(pdev) == PCI_EXP_TYPE_PCIE_BRIDGE || + !pdev->bus->parent->self) { link->root = link; } else { struct pcie_link_state *parent; |