Re: rtlwifi/rtl8192cu AP mode broken with PS STA

[Larry Finger]

On 4/18/21 7:32 PM, Pkshih wrote:
> > -----Original Message-----
> > From: Maciej S. Szmigiero [mailto:mail@xxxxxxxxxxxxxxxxxxxxx]
> > Sent: Sunday, April 18, 2021 2:08 AM
> > To: Pkshih
> > Cc: linux-wireless@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> > johannes@xxxxxxxxxxxxxxxx; kvalo@xxxxxxxxxxxxxx; Larry Finger
> > Subject: Re: rtlwifi/rtl8192cu AP mode broken with PS STA
> >
> > On 08.04.2021 21:04, Maciej S. Szmigiero wrote:
> > > On 08.04.2021 06:42, Pkshih wrote:
> > > > > -----Original Message-----
> > > > > From: Maciej S. Szmigiero [mailto:mail@xxxxxxxxxxxxxxxxxxxxx]
> > > > > Sent: Thursday, April 08, 2021 4:53 AM
> > > > > To: Larry Finger; Pkshih
> > > > > Cc: linux-wireless@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> > > > > johannes@xxxxxxxxxxxxxxxx; kvalo@xxxxxxxxxxxxxx
> > > > > Subject: Re: rtlwifi/rtl8192cu AP mode broken with PS STA
> > > (...)
> > > > > > Maceij,
> > > > > >
> > > > > > Does this patch fix the problem?
> > > > >
> > > > > The beacon seems to be updating now and STAs no longer get stuck in PS
> > > > > mode.
> > > > > Although sometimes (every 2-3 minutes with continuous 1s interval pings)
> > > > > there is around 5s delay in updating the transmitted beacon - don't know
> > > > > why, maybe the NIC hardware still has the old version in queue?
> > > >
> > > > Since USB device doesn't update every beacon, dtim_count isn't updated neither.
> > > > It leads STA doesn't awake properly. Please try to fix dtim_period=1 in
> > > > hostapd.conf, which tells STA awakes every beacon interval.
> > >
> > > The situation is the same with dtim_period=1.
> > (...)
> >
> > Ping-Ke,
> > are you going to submit your set_tim() patch so at least the AP mode is
> > usable with PS STAs or are you waiting for a solution to the delayed
> > beacon update issue?
>
> I'm still trying to get a 8192cu, and then I can reproduce the symptom you
> met. However, I'm busy now; maybe I have free time two weeks later.
>
> Do you think I submit the set_tim() patch with your Reported-by and Tested-by first?

PK,

I would say yes. Get the fix in as soon as possible.

Larry