diff options
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index b7335be56008..b809c0b0e0e5 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2209,67 +2209,6 @@ static void pci_configure_relaxed_ordering(struct pci_dev *dev) } } -static void pci_configure_ltr(struct pci_dev *dev) -{ -#ifdef CONFIG_PCIEASPM - struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); - struct pci_dev *bridge; - u32 cap, ctl; - - if (!pci_is_pcie(dev)) - return; - - /* Read L1 PM substate capabilities */ - dev->l1ss = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_L1SS); - - pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap); - if (!(cap & PCI_EXP_DEVCAP2_LTR)) - return; - - pcie_capability_read_dword(dev, PCI_EXP_DEVCTL2, &ctl); - if (ctl & PCI_EXP_DEVCTL2_LTR_EN) { - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) { - dev->ltr_path = 1; - return; - } - - bridge = pci_upstream_bridge(dev); - if (bridge && bridge->ltr_path) - dev->ltr_path = 1; - - return; - } - - if (!host->native_ltr) - return; - - /* - * Software must not enable LTR in an Endpoint unless the Root - * Complex and all intermediate Switches indicate support for LTR. - * PCIe r4.0, sec 6.18. - */ - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) { - pcie_capability_set_word(dev, PCI_EXP_DEVCTL2, - PCI_EXP_DEVCTL2_LTR_EN); - dev->ltr_path = 1; - return; - } - - /* - * If we're configuring a hot-added device, LTR was likely - * disabled in the upstream bridge, so re-enable it before enabling - * it in the new device. - */ - bridge = pci_upstream_bridge(dev); - if (bridge && bridge->ltr_path) { - pci_bridge_reconfigure_ltr(dev); - pcie_capability_set_word(dev, PCI_EXP_DEVCTL2, - PCI_EXP_DEVCTL2_LTR_EN); - dev->ltr_path = 1; - } -#endif -} - static void pci_configure_eetlp_prefix(struct pci_dev *dev) { #ifdef CONFIG_PCI_PASID |