pcie_update_link_speed() is passed the Link Status register but not all callers have that value at hand nor need the value.
Refactor pcie_update_link_speed() to include reading the Link Status register into pcie_update_link_speed() and create __pcie_update_link_speed() which can be used by the hotplug code that has the register value at hand beforehand (and needs the value for other purposes). Signed-off-by: Ilpo Järvinen <[email protected]> --- drivers/pci/hotplug/pciehp_hpc.c | 2 +- drivers/pci/pci.h | 7 ++++++- drivers/pci/probe.c | 12 +++++++----- 3 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index b1d0a1b3917d..0d818110af6d 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -319,7 +319,7 @@ int pciehp_check_link_status(struct controller *ctrl) return -1; } - pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status); + __pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status); if (!found) { ctrl_info(ctrl, "Slot(%s): No device found\n", diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 602b270c4408..47d8ccf6230c 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -297,7 +297,12 @@ enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev); enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev); void __pcie_print_link_status(struct pci_dev *dev, bool verbose); void pcie_report_downtraining(struct pci_dev *dev); -void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); + +static inline void __pcie_update_link_speed(struct pci_bus *bus, u16 linksta) +{ + bus->cur_bus_speed = pcie_link_speed[linksta & PCI_EXP_LNKSTA_CLS]; +} +void pcie_update_link_speed(struct pci_bus *bus); /* Single Root I/O Virtualization */ struct pci_sriov { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 6512b4fca229..42dbcc401443 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -742,9 +742,13 @@ const char *pci_speed_string(enum pci_bus_speed speed) } EXPORT_SYMBOL_GPL(pci_speed_string); -void pcie_update_link_speed(struct pci_bus *bus, u16 linksta) +void pcie_update_link_speed(struct pci_bus *bus) { - bus->cur_bus_speed = pcie_link_speed[linksta & PCI_EXP_LNKSTA_CLS]; + struct pci_dev *bridge = bus->self; + u16 linksta; + + pcie_capability_read_word(bridge, PCI_EXP_LNKSTA, &linksta); + __pcie_update_link_speed(bus, linksta); } EXPORT_SYMBOL_GPL(pcie_update_link_speed); @@ -827,13 +831,11 @@ static void pci_set_bus_speed(struct pci_bus *bus) if (pci_is_pcie(bridge)) { u32 linkcap; - u16 linksta; pcie_capability_read_dword(bridge, PCI_EXP_LNKCAP, &linkcap); bus->max_bus_speed = pcie_link_speed[linkcap & PCI_EXP_LNKCAP_SLS]; - pcie_capability_read_word(bridge, PCI_EXP_LNKSTA, &linksta); - pcie_update_link_speed(bus, linksta); + pcie_update_link_speed(bus); } } -- 2.39.2
