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| author | Alex Shi <alex.shi@linaro.org> | 2016-12-12 22:17:50 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-12-12 22:17:50 +0800 |
| commit | d2a15c13d6db9745a496a89025f665445b586ff2 (patch) | |
| tree | 00cd710425a9354bc46fe42bd4320e121d92647a /include/linux/pci.h | |
| parent | 66e16b528a0b76260617552fce9c44fecb8b51fe (diff) | |
| parent | a057484ab40ff81f22a94bb62c035c78b5abd940 (diff) | |
Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-rtlsk-v4.4-16.12-rt
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 e89c7ee7e803..5f37614f2451 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1802,6 +1802,20 @@ 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, |