| Message ID | 20170926141720.25067-3-mika.westerberg@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
diff --git a/include/linux/pci.h b/include/linux/pci.h index f68c58a93dd0..4397692be538 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2042,6 +2042,17 @@ static inline int pci_pcie_type(const struct pci_dev *dev) return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4; } +/** + * pcie_upstream_port - is the PCI device PCIe upstream port + * @dev: PCI device + */ +static inline bool pcie_upstream_port(struct pci_dev *dev) +{ + if (!pci_is_pcie(dev)) + return false; + return pci_pcie_type(dev) == PCI_EXP_TYPE_UPSTREAM; +} + static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) { while (1) {
This helper allows to determine whether the PCI device is PCIe upstream port. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- include/linux/pci.h | 11 +++++++++++ 1 file changed, 11 insertions(+)