[SRU] [F/Unstable/OEM-OSP1-B/OEM-5.6] [PATCH 0/2] Fix Pericom USB controller OHCI/EHCI PME# defect
Kai-Heng Feng
kai.heng.feng at canonical.com
Mon May 18 13:16:49 UTC 2020
BugLink: https://bugs.launchpad.net/bugs/1879321
[Impact]
Pericom EHCI/OHCI USB Controller can't detect hotplug event when it's
runtime-suspended, due to its unreliable PME#.
[Fix]
Disable PME for all its power state since all of them don't work
reliably.
[Test]
Hotplugging event can be reliably detected by the device, after the fix
gets applied.
[Regression Potential]
Low. This targets specific device, without touching any logic.
Kai-Heng Feng (2):
serial: 8250_pci: Move Pericom IDs to pci_ids.h
PCI: Avoid Pericom USB controller OHCI/EHCI PME# defect
drivers/pci/quirks.c | 14 ++++++++++----
drivers/tty/serial/8250/8250_pci.c | 6 ------
include/linux/pci_ids.h | 6 ++++++
3 files changed, 16 insertions(+), 10 deletions(-)
--
2.17.1
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