From 577034f6a9ad6da70ff59b6ed83e9afc22a47231 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Wed, 7 Apr 2021 11:00:15 +0800 Subject: [PATCH] xhci: fix runtime pm enabling for quirky Intel hosts mainline inclusion from mainline-5.6.9 commit 024d411e9c5d49eb96c825af52a3ce2682895676 category: bugfix bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=19 CVE: NA ----------------------------------------------------------- commit 024d411e9c5d49eb96c825af52a3ce2682895676 upstream. Intel hosts that need the XHCI_PME_STUCK_QUIRK flag should enable runtime pm by calling xhci_pme_acpi_rtd3_enable() before usb_hcd_pci_probe() calls pci_dev_run_wake(). Otherwise usage count for the device won't be decreased, and runtime suspend is prevented. usb_hcd_pci_probe() only decreases the usage count if device can generate run-time wake-up events, i.e. when pci_dev_run_wake() returns true. This issue was exposed by pci_dev_run_wake() change in commit 8feaec33b986 ("PCI / PM: Always check PME wakeup capability for runtime wakeup support") and should be backported to kernels with that change Cc: # 4.13+ Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20200210134553.9144-4-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yang Yingliang Reviewed-by: LeoLiu-oc Reviewed-by: Xie XiuQi Signed-off-by: Cheng Jian --- drivers/usb/host/xhci-pci.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 69b75b3482c7..990a9cac58e2 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -283,6 +283,9 @@ static int xhci_pci_setup(struct usb_hcd *hcd) if (!usb_hcd_is_primary_hcd(hcd)) return 0; + if (xhci->quirks & XHCI_PME_STUCK_QUIRK) + xhci_pme_acpi_rtd3_enable(pdev); + xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); /* Find any debug ports */ @@ -354,9 +357,6 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) HCC_MAX_PSA(xhci->hcc_params) >= 4) xhci->shared_hcd->can_do_streams = 1; - if (xhci->quirks & XHCI_PME_STUCK_QUIRK) - xhci_pme_acpi_rtd3_enable(dev); - /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */ pm_runtime_put_noidle(&dev->dev); -- GitLab