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Date:   Wed, 24 May 2023 12:45:10 +0200
From:   "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>
To:     "petter@technux.se" <petter@technux.se>
Cc:     "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
        "pkshih@realtek.com" <pkshih@realtek.com>,
        "tony0620emma@gmail.com" <tony0620emma@gmail.com>
Subject: Re: rtw88: rtw8822cu (LM842) -> failed to get tx report from firmware
Message-ID: <20230524104510.GV15436@pengutronix.de>
References: <188007.70407276-sendEmail@petterwork>
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Hi Petter,

On Thu, Apr 06, 2023 at 10:41:20AM +0000, petter@technux.se wrote:
> Hi,
> 
> I have seen a very similar issue as Andreas. It was found when streaming a mender file (using mender install <url> from my arm device. But I have also managed to reproduce a similar issue by flooding the interface using iperf. 
> 
> on target:
> $ sudo iperf -s -u
> 
> On host:
> $ iperf -c <ip> -u -b 200M -t 300
> 
> Then it will almost instantly get problems causing the lm842 dongle to stop working.

I could finally reproduce this problem by placing an access point close
enough to my device. Only then the incoming packet rate is high enough
that the "failed to get rx_queue, overflow" message triggers.

In my case the time it takes to print this message many times is enough
to confuse the device so that it finally responds with:

[  126.449305] rtw_8822cu 1-1:1.2: failed to get tx report from firmware
[  142.081419] rtw_8822cu 1-1:1.2: firmware failed to report density after scan
[  175.929407] rtw_8822cu 1-1:1.2: firmware failed to report density after scan

I just sent a patch printing the message with dev_dbg_ratelimited
instead which fixes that problem for me, you're on Cc.

It likely won't fix Andreas' problem though, as I don't see this message
in his bug report.

Sascha

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