ACK: [SRU] [J/Unstable/OEM-5.15/OEM-5.17] [PATCH 0/2] Power cycle USB ports on shutdown/reboot

[Luke Nowakowski-Krijger]

Acked-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger at canonical.com>

On Wed, Jun 1, 2022 at 6:03 AM Kai-Heng Feng <kai.heng.feng at canonical.com>
wrote:

> BugLink: https://bugs.launchpad.net/bugs/1976503
>
> [Impact]
> USB storage can be stuck in USB reset loop after reboot. More reboots
> don't help the situation, unless it's re-plugged.
>
> [Fix]
> Power cycle USB ports on system shutdown/reboot.
>
> [Test]
> The USB storage survived 300 times of reboots, and it works under each
> reboot cycle.
>
> [Where problems could occur]
> One potential problem I can think of is S5 WoL over USB ethernet. Since
> the port power and its associated ACPI power are turned off, WoL may
> stop working, if WoL over USB is a thing.
>
> Henry Lin (1):
>   xhci: stop polling roothubs after shutdown
>
> Mathias Nyman (1):
>   UBUNTU: SAUCE: xhci: turn off port power in shutdown
>
>  drivers/usb/host/xhci-hub.c |  2 +-
>  drivers/usb/host/xhci.c     | 25 +++++++++++++++++++++++--
>  drivers/usb/host/xhci.h     |  2 ++
>  3 files changed, 26 insertions(+), 3 deletions(-)
>
> --
> 2.36.1
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
>
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