On Wed, Jun 18, 2025 at 10:41:15AM +0800, Richard Zhu wrote:
> Skip PME_Turn_Off message if there is no endpoint connected.
>
> Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
> ---
> drivers/pci/controller/dwc/pcie-designware-host.c | 15 +++++++++------
> 1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 2d58a3eb94a1..228484e3ea4a 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -1035,12 +1035,15 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci)
> if (dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKCTL) & PCI_EXP_LNKCTL_ASPM_L1)
> return 0;
>
> - if (pci->pp.ops->pme_turn_off) {
> - pci->pp.ops->pme_turn_off(&pci->pp);
> - } else {
> - ret = dw_pcie_pme_turn_off(pci);
> - if (ret)
> - return ret;
> + /* Skip PME_Turn_Off message if there is no endpoint connected */
> + if (dw_pcie_get_ltssm(pci) > DW_PCIE_LTSSM_DETECT_WAIT) {
> + if (pci->pp.ops->pme_turn_off) {
> + pci->pp.ops->pme_turn_off(&pci->pp);
> + } else {
> + ret = dw_pcie_pme_turn_off(pci);
> + if (ret)
> + return ret;
> + }
> }
>
> if (dwc_quirk(pci, QUIRK_NOL2POLL_IN_PM)) {
> --
> 2.37.1
>
