linux-kernel - Re: rtlwifi/rtl8192cu AP mode broken with PS STA

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Message-ID: <cfcc2988-3f20-3588-2f76-f04d09043811@maciej.szmigiero.name>
Date:   Sat, 17 Apr 2021 20:07:52 +0200
From:   "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To:     Pkshih <pkshih@...ltek.com>
Cc:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "johannes@...solutions.net" <johannes@...solutions.net>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        Larry Finger <Larry.Finger@...inger.net>
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@...iej.szmigiero.name]
>>> Sent: Thursday, April 08, 2021 4:53 AM
>>> To: Larry Finger; Pkshih
>>> Cc: linux-wireless@...r.kernel.org; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
>>> johannes@...solutions.net; kvalo@...eaurora.org
>>> 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?

Thanks,
Maciej