This is a note to let you know that I've just added the patch titled PCI: Avoid ASMedia XHCI USB PME# from D0 defect to the 5.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-avoid-asmedia-xhci-usb-pme-from-d0-defect.patch and it can be found in the queue-5.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 91ebe26c53ebb0bc93cf58ec8ff7172710804508 Author: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> Date: Fri Dec 20 03:20:06 2019 +0800 PCI: Avoid ASMedia XHCI USB PME# from D0 defect commit 2880325bda8d53566dcb9725abc929eec871608e upstream. The ASMedia USB XHCI Controller claims to support generating PME# while in D0: 01:00.0 USB controller: ASMedia Technology Inc. Device 2142 (prog-if 30 [XHCI]) Subsystem: SUNIX Co., Ltd. Device 312b Capabilities: [78] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME- However PME# only gets asserted when plugging USB 2.0 or USB 1.1 devices, but not for USB 3.0 devices. Remove PCI_PM_CAP_PME_D0 to avoid using PME under D0. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205919 Link: https://lore.kernel.org/r/20191219192006.16270-1-kai.heng.feng@xxxxxxxxxxxxx Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index b7347bc6a24d2..3e0ca273f903c 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5527,3 +5527,14 @@ out_disable: DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1, PCI_CLASS_DISPLAY_VGA, 8, quirk_reset_lenovo_thinkpad_p50_nvgpu); + +/* + * Device [1b21:2142] + * When in D0, PME# doesn't get asserted when plugging USB 3.0 device. + */ +static void pci_fixup_no_d0_pme(struct pci_dev *dev) +{ + pci_info(dev, "PME# does not work under D0, disabling it\n"); + dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme);