linux-kernel - Re: WARNING: suspicious RCU usage (5.11.0-rc7+ #1812 Tainted: G)

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Message-ID: <87pn18tsa2.fsf@codeaurora.org>
Date:   Wed, 10 Feb 2021 07:18:13 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Paul McKenney <paulmck@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        LKML <linux-kernel@...r.kernel.org>, ath10k@...ts.infradead.org,
        Johannes Berg <johannes@...solutions.net>
Subject: Re: WARNING: suspicious RCU usage (5.11.0-rc7+ #1812 Tainted: G)

"Rafael J. Wysocki" <rafael@...nel.org> writes:

>> > AFAICT that's a simple 'use RCU without holding rcu_read_lock' warning.
>> > I've not dug through ath10k to see who should be doing rcu_read_lock,
>> > but the few places I did look at don't seem to have changed recently.
>>
>> Just this morning I applied a patch which should fix this:
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=ath-next&id=2615e3cdbd9c0e864f5906279c952a309871d225
>>
>> Please let me know if it fixes the issue.
>
> The traces are gone after applying this patch, so it does help:
>
> Tested-by: Rafael J. Wysocki <rafael@...nel.org>

Good, thanks for testing.

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