APPLIED[B/C/D]: [SRU] [B/C/D/Unstable/OEM-B/OEM-OSP1-B] [PATCH 0/1] Fix disappearing Qualcomm WiFi/Bluetooth

[Kleber Souza]

On 6/10/19 9:21 AM, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1757218
> 
> [Impact]
> Qualcomm WiFi/Bluetooth may disappear after boot.
> 
> [Fix]
> Disable USB2 LPM at shutdown phase, to prevent it from lingering in LPM
> L1. Pull back the device to full power before shutdown imitates the
> behavior on Windows.
> 
> [Test]
> The affected user confimed it fixes the issue.
> I can also confirm that
> a) The power drain in S5 is much lower,
> b) Both WiFi and Bluetooth are always present during reboot stress test.
> 
> [Regression Potential]
> Low. Only a limited number of USB2 devices that support LPM.
> 
> Kai-Heng Feng (1):
>   UBUNTU: SAUCE: USB: Disable USB2 LPM at shutdown
> 
>  drivers/usb/core/port.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Applied to {bionic,cosmic,disco}/master-next branch.

Thanks,
Kleber