diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-12-19 22:20:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 18:25:52 +0300 |
| commit | 7829106c1c31b326d08d32d0ffbd3d28a262e7e1 (patch) | |
| tree | 4d997bb94e5b20ef35f1ebe308541667e9aa85d4 /drivers | |
| parent | c8aacb4d02974b3818ba9800f52c74fb1dcc5cf8 (diff) | |
| download | linux-7829106c1c31b326d08d32d0ffbd3d28a262e7e1.tar.xz | |
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@canonical.com
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/quirks.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 9e20ace30b62..3b89d576aba8 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5282,3 +5282,14 @@ 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); |