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RE: [PATCH 28/40] rtw88: 8723d: Add shutdown callback to disable BT USB suspend

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> On 2020-04-17 15:46:41 [+0800], yhchuang@xxxxxxxxxxx wrote:
> > From: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
> >
> > Without this patch, wifi card can't initialize properly due to BT in USB
> > suspend state. So, we disable BT USB suspend (wakeup) in shutdown callback
> > that is the moment before rebooting. To save BT USB power, we can't do this
> > in 'remove' callback.
> 
> So you can't initialize the USB part because it is in suspend and the
> only way to avoid it to disable it on the PCI side. That means you don't
> see it enumerated on the USB bus at all?

Yes, if we don't disable it on PCI side, then the USB part cannot be
probed on USB bus.

> 
> > Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
> > Signed-off-by: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx>
> 
> Sebastian
> 

Yen-Hsuan




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