APPLIED: [SRU] [A/B][Cosmic] [PATCH 0/1] Fix an issue that some PCI devices get incorrectly suspended

[Kleber Souza]

On 05/15/18 18:55, Po-Hsu Lin wrote:
> This needs to be applied to Cosmic as well, as per sender's request in
> the following ACK/cmnt discussions.
> https://lists.ubuntu.com/archives/kernel-team/2018-May/092372.html

Cosmic is handled by the development team, I have added a Cosmic tag on
the subject to get their attention.


Thanks,
Kleber

> 
> On Wed, May 16, 2018 at 12:22 AM, Kleber Souza
> <kleber.souza at canonical.com> wrote:
>> On 05/14/18 09:07, Kai-Heng Feng wrote:
>>> BugLink: https://bugs.launchpad.net/bugs/1764684
>>>
>>> [Impact]
>>> Some PCI device are not power managed by system firmware get runtime
>>> suspended incorrectly. In this case it's an xHC device, which can't be
>>> woken up by plugging USB device.
>>>
>>> [Test]
>>> With the patch, the xHC no longer get put to suspend incorrectly. USB
>>> devices can work on the xHC now.
>>>
>>> [Fix]
>>> We need to check if the device is power managed by system firmware, also
>>> if it supports PME from D3hot.
>>>
>>> Now the patch is in upstream, we can backport it as what we did for
>>> linux-oem:
>>> https://lists.ubuntu.com/archives/kernel-team/2018-April/091665.html
>>>
>>> [Regression Potential]
>>> Low.
>>> It fixes a regression caused by the PM core refactor.
>>>
>>> Kai Heng Feng (1):
>>>   PCI / PM: Always check PME wakeup capability for runtime wakeup
>>>     support
>>>
>>>  drivers/pci/pci.c | 8 ++++----
>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>
>> Applied to artful/master-next and bionic/master-next branches.
>>
>> Thanks,
>> Kleber
>>
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