linux-kernel - Re: [Softirq] a76eadba0d: WARNING:at_net/mac80211/rx.c:#ieee80211_rx

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Message-ID: <87v9iexztl.fsf@nanos.tec.linutronix.de>
Date:   Thu, 23 Jul 2020 12:58:46 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     kernel test robot <lkp@...el.com>, qianjun.kernel@...il.com
Cc:     peterz@...radead.org, will@...nel.org, luto@...nel.org,
        linux-kernel@...r.kernel.org, urezki@...il.com,
        laoar.shao@...il.com, jun qian <qianjun.kernel@...il.com>,
        0day robot <lkp@...el.com>, lkp@...ts.01.org
Subject: Re: [Softirq] a76eadba0d: WARNING:at_net/mac80211/rx.c:#ieee80211_rx_napi[mac80211]

kernel test robot <lkp@...el.com> writes:
> [  106.856151] WARNING: CPU: 5 PID: 4569 at net/mac80211/rx.c:4708 ieee80211_rx_napi+0x44d/0x560 [mac80211]

Bah. I clearly should have noticed when looking at the patch.

     pending = softirq_pending();

     set_softirq_pending(0);

     while (pending) {
           ....

           if (timeout)
           	break;
     }

That drops everything which has not yet been processed and the above
warning is due to this.

Thanks,

        tglx