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Diffstat (limited to 'drivers/pci/pcie/portdrv_core.c')
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 3779b264dbec..a785019eb46b 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -221,7 +221,16 @@ static int get_port_device_capability(struct pci_dev *dev) } #ifdef CONFIG_PCIEAER + /* + * Some AER interrupt capability registers may not be present on + * non Root ports. Since there is no way to check presence of + * ROOT_ERR_COMMAND and ROOT_ERR_STATUS registers. Allow AER + * service only on root ports. Refer PCIe rev5.0 spec v1.0 7.8.4. + * Otherwise AER interrupt message number is read incorrectly + * causing MSIX vector registration to fail and fallback to legacy. + */ if (dev->aer_cap && pci_aer_available() && + pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && (pcie_ports_native || host->native_aer)) { services |= PCIE_PORT_SERVICE_AER; |