diff options
| -rw-r--r-- | drivers/pci/probe.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 257b9f6f2ebb..43e6583417ce 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1856,8 +1856,6 @@ static void program_hpp_type0(struct pci_dev *dev, struct hpp_type0 *hpp) pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, hpp->latency_timer); pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); - if (hpp->enable_serr) - pci_bctl |= PCI_BRIDGE_CTL_SERR; if (hpp->enable_perr) pci_bctl |= PCI_BRIDGE_CTL_PARITY; pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); @@ -2129,6 +2127,24 @@ static void pci_configure_eetlp_prefix(struct pci_dev *dev) #endif } +static void pci_configure_serr(struct pci_dev *dev) +{ + u16 control; + + if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { + + /* + * A bridge will not forward ERR_ messages coming from an + * endpoint unless SERR# forwarding is enabled. + */ + pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &control); + if (!(control & PCI_BRIDGE_CTL_SERR)) { + control |= PCI_BRIDGE_CTL_SERR; + pci_write_config_word(dev, PCI_BRIDGE_CONTROL, control); + } + } +} + static void pci_configure_device(struct pci_dev *dev) { struct hotplug_params hpp; @@ -2139,6 +2155,7 @@ static void pci_configure_device(struct pci_dev *dev) pci_configure_relaxed_ordering(dev); pci_configure_ltr(dev); pci_configure_eetlp_prefix(dev); + pci_configure_serr(dev); memset(&hpp, 0, sizeof(hpp)); ret = pci_get_hp_params(dev, &hpp); |