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PCI: Use pcie_get_speed_cap() in PCIe failed link retraining

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Rewrite a check for the maximum link speed in the Link Capabilities
register in terms of pcie_get_speed_cap().  No functional change.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Link: https://patch.msgid.link/alpine.DEB.2.21.2512080348310.49654@angie.orcam.me.uk
This commit is contained in:
Maciej W. Rozycki 2025-12-08 19:24:34 +00:00 committed by Bjorn Helgaas
parent 72780f7964
commit 30a3613080
1 changed files with 4 additions and 4 deletions
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8
drivers/pci/quirks.c
View File

@ -95,8 +95,8 @@ static bool pcie_lbms_seen(struct pci_dev *dev, u16 lnksta)
int pcie_failed_link_retrain(struct pci_dev *dev)
{
u16 lnksta, lnkctl2, oldlnkctl2;
enum pci_bus_speed speed_cap;
int ret = -ENOTTY;
u32 lnkcap;
if (!pci_is_pcie(dev) || !pcie_downstream_port(dev) ||
!pcie_cap_has_lnkctl2(dev) || !dev->link_active_reporting)
@ -111,12 +111,12 @@ int pcie_failed_link_retrain(struct pci_dev *dev)
goto err;
}
speed_cap = pcie_get_speed_cap(dev);
pcie_capability_read_word(dev, PCI_EXP_LNKCTL2, &lnkctl2);
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
if ((lnkctl2 & PCI_EXP_LNKCTL2_TLS) == PCI_EXP_LNKCTL2_TLS_2_5GT &&
(lnkcap & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
speed_cap > PCIE_SPEED_2_5GT) {
pci_info(dev, "removing 2.5GT/s downstream link speed restriction\n");
ret = pcie_set_target_speed(dev, PCIE_LNKCAP_SLS2SPEED(lnkcap), false);
ret = pcie_set_target_speed(dev, speed_cap, false);
if (ret)
goto err;
}