[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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