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Sender: Larry Finger <larry.finger@gmail.com>
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Date:   Mon, 31 Jan 2022 16:53:44 -0600
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From:   Larry Finger <Larry.Finger@lwfinger.net>
Subject: Funny log entries for rtw88_8821ce
To:     Pkshih <pkshih@realtek.com>
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Cc:     linux-wireless <linux-wireless@vger.kernel.org>
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Ping-Ke and list,

Within the last couple of days, I was testing rtw88 with an rtl8821ce card. I 
noticed that whenever the device is not connected to an AP, the log is flooded 
with messages like the following:
[130462.603539] rtw_8821ce 0000:02:00.0: stop vif ee:a4:95:4e:53:8b on port 0
[130463.116843] rtw_8821ce 0000:02:00.0: start vif aa:fc:19:66:5e:e2 on port 0
[130874.613430] rtw_8821ce 0000:02:00.0: stop vif aa:fc:19:66:5e:e2 on port 0
[130875.122641] rtw_8821ce 0000:02:00.0: start vif d2:e6:23:ba:98:76 on port 0
[131286.677828] rtw_8821ce 0000:02:00.0: stop vif d2:e6:23:ba:98:76 on port 0
[131287.192108] rtw_8821ce 0000:02:00.0: start vif 82:c4:33:96:2e:c6 on port 0\

After ~411 secs, the callback routine for remove_interface() in struct 
ieee80211_ops is called. After <1 sec, the add_interface() callback is called to 
restart the vif. Is this normal behavior and I see it in the logs because this 
driver is the only one that logs the start/stop calls, or is something else 
going on? It would be easy to disable those log entries, but I would like to 
know if there is some other condition?

On my kernel, HZ is 250, thus the interval is roughly 103,000 jiffies.

Thanks,

Larry