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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-12-13 20:16:40 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-12-13 20:16:40 -0300 |
| commit | 6baeafd1f2a54ca041ff71778ebda9fac75aad12 (patch) | |
| tree | 57d2d68fa5d1d91f57cd7fcf0aed0a97892cc8cc /include/linux/pci.h | |
| parent | 189382f7a338c02b448ab27e1d5566e052165dc8 (diff) | |
Linux-libre 4.8.14-gnuHEADpck-4.8.14-gnumaster
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 0ab835965..03f3df088 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1896,6 +1896,20 @@ static inline int pci_pcie_type(const struct pci_dev *dev) return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4; } +static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) +{ + while (1) { + if (!pci_is_pcie(dev)) + break; + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) + return dev; + if (!dev->bus->self) + break; + dev = dev->bus->self; + } + return NULL; +} + void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start, |