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

[Po-Hsu Lin]

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

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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