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This does not change any behavior, but aspm_get_l1ss_cap() can be reused later. Link: https://bugzilla.kernel.org/show_bug.cgi?id=3D218394 Signed-off-by: Jian-Hong Pan Reviewed-by: David E. Box --- v6: - Skipped v7: - Pick back v8: - The same drivers/pci/pcie/aspm.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index bd0a8a05647e..5db1044c9895 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -611,6 +611,18 @@ static void pcie_aspm_check_latency(struct pci_dev *en= dpoint) } } =20 +static u32 aspm_get_l1ss_cap(struct pci_dev *pdev) +{ + u32 l1ss_cap; + + pci_read_config_dword(pdev, pdev->l1ss + PCI_L1SS_CAP, &l1ss_cap); + + if (!(l1ss_cap & PCI_L1SS_CAP_L1_PM_SS)) + l1ss_cap =3D 0; + + return l1ss_cap; +} + /* Calculate L1.2 PM substate timing parameters */ static void aspm_calc_l12_info(struct pcie_link_state *link, u32 parent_l1ss_cap, u32 child_l1ss_cap) @@ -721,15 +733,8 @@ static void aspm_l1ss_init(struct pcie_link_state *lin= k) return; =20 /* Setup L1 substate */ - pci_read_config_dword(parent, parent->l1ss + PCI_L1SS_CAP, - &parent_l1ss_cap); - pci_read_config_dword(child, child->l1ss + PCI_L1SS_CAP, - &child_l1ss_cap); - - if (!(parent_l1ss_cap & PCI_L1SS_CAP_L1_PM_SS)) - parent_l1ss_cap =3D 0; - if (!(child_l1ss_cap & PCI_L1SS_CAP_L1_PM_SS)) - child_l1ss_cap =3D 0; + parent_l1ss_cap =3D aspm_get_l1ss_cap(parent); + child_l1ss_cap =3D aspm_get_l1ss_cap(child); =20 /* * If we don't have LTR for the entire path from the Root Complex --=20 2.45.2