This is a note to let you know that I've just added the patch titled
xhci: fix runtime pm enabling for quirky Intel hosts
to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 024d411e9c5d49eb96c825af52a3ce2682895676 Mon Sep 17 00:00:00 2001
From: Mathias Nyman mathias.nyman@linux.intel.com Date: Mon, 10 Feb 2020 15:45:52 +0200 Subject: xhci: fix runtime pm enabling for quirky Intel hosts
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: stable@vger.kernel.org # 4.13+ Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20200210134553.9144-4-mathias.nyman@linux.intel.co... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 4917c5b033fa..da7c2db41671 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -302,6 +302,9 @@ 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 */ @@ -359,9 +362,6 @@ 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);