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Any device enumerated after the disqualifying one -- including a wakeup-enabled, PME-from-D3cold capable endpoint -- is then never visited, so pme_capable can come back false even though such a device exists on the bus. Since pci_host_common_d3cold_possible() already returns false whenever any device disqualifies D3cold, aborting the walk buys nothing for the plain suspend path: the overall bool result is unaffected. But it silently drops pme_capable detection for any device ordered after the disqualifying one. This matters for the upcoming shutdown path in particular: unlike plain suspend, shutdown forces the link into L2/D3cold regardless of whether pci_host_common_d3cold_possible() itself allows it (see the following "force_d3cold" changes), so at shutdown time it's common for an endpoint to still be in D0 and disqualify D3cold while a later, PME-capable device is never visited. dw_pcie_suspend_noirq() still uses "pme_capable" to set pci->pp.skip_pwrctrl_off, so an inaccurate result here can cause Vaux/wakeup support to be dropped for a device that actually supports PME from D3cold. Signed-off-by: Krishna Chaitanya Chundru --- drivers/pci/controller/pci-host-common.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c index a23907a875e5..78bc4c8c9656 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -274,22 +274,19 @@ static int __pci_host_common_d3cold_possible(struct pci_dev *pdev, if (!pdev->dev.driver && !pci_is_enabled(pdev)) return 0; - if (pdev->current_state != PCI_D3hot) - goto exit; + if (pdev->current_state != PCI_D3hot) { + *flags &= ~PCI_HOST_D3COLD_ALLOWED; + return 0; + } if (device_may_wakeup(&pdev->dev)) { - if (!pci_pme_capable(pdev, PCI_D3cold)) - goto exit; - else + if (pci_pme_capable(pdev, PCI_D3cold)) *flags |= PCI_HOST_PME_D3COLD_CAPABLE; + else + *flags &= ~PCI_HOST_D3COLD_ALLOWED; } return 0; - -exit: - *flags &= ~PCI_HOST_D3COLD_ALLOWED; - - return -EOPNOTSUPP; } /** -- 2.34.1