diff options
Diffstat (limited to 'drivers/pci/access.c')
| -rw-r--r-- | drivers/pci/access.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index d9b64a175990..5465b005220c 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -531,6 +531,14 @@ static inline int pcie_cap_version(const struct pci_dev *dev) return pcie_caps_reg(dev) & PCI_EXP_FLAGS_VERS; } +static bool pcie_downstream_port(const struct pci_dev *dev) +{ + int type = pci_pcie_type(dev); + + return type == PCI_EXP_TYPE_ROOT_PORT || + type == PCI_EXP_TYPE_DOWNSTREAM; +} + bool pcie_cap_has_lnkctl(const struct pci_dev *dev) { int type = pci_pcie_type(dev); @@ -546,10 +554,7 @@ bool pcie_cap_has_lnkctl(const struct pci_dev *dev) static inline bool pcie_cap_has_sltctl(const struct pci_dev *dev) { - int type = pci_pcie_type(dev); - - return (type == PCI_EXP_TYPE_ROOT_PORT || - type == PCI_EXP_TYPE_DOWNSTREAM) && + return pcie_downstream_port(dev) && pcie_caps_reg(dev) & PCI_EXP_FLAGS_SLOT; } @@ -628,10 +633,9 @@ int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val) * State bit in the Slot Status register of Downstream Ports, * which must be hardwired to 1b. (PCIe Base Spec 3.0, sec 7.8) */ - if (pci_is_pcie(dev) && pos == PCI_EXP_SLTSTA && - pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM) { + if (pci_is_pcie(dev) && pcie_downstream_port(dev) && + pos == PCI_EXP_SLTSTA) *val = PCI_EXP_SLTSTA_PDS; - } return 0; } @@ -657,10 +661,9 @@ int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val) return ret; } - if (pci_is_pcie(dev) && pos == PCI_EXP_SLTCTL && - pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM) { + if (pci_is_pcie(dev) && pcie_downstream_port(dev) && + pos == PCI_EXP_SLTSTA) *val = PCI_EXP_SLTSTA_PDS; - } return 0; } |