Re: [PATCH] rtw88: pci: Power cycle device during shutdown

[Brian Norris]

On Mon, Aug 24, 2020 at 2:32 AM Kai-Heng Feng
<kai.heng.feng@xxxxxxxxxxxxx> wrote:
>
> Sometimes system freeze on cold/warm boot when rtw88 is probing.
>
> According to [1], platform firmware may not properly power manage the
> device during shutdown. I did some expirements and putting the device to
> D3 can workaround the issue.
>
> So let's power cycle the device by putting the device to D3 at shutdown
> to prevent the issue from happening.
>
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=206411#c9
>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>

Can you at least include some more details, like which hardware
version and firmware? And which platform? It seems a bit harsh to
include a platform workaround to run for everyone, unless there's
truly no downside. But even then, it's good to log what you're working
with, in case there are ever problems with this in the future.

Brian