linux-kernel - Re: [PATCH 2/6] regulator: core: skip nesting lock for -EDEADLK

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Message-ID: <CAD=FV=Vu1GqYHAU99ZkQvYtupireTgtjwUGMXPOCivG-m+xVoA@mail.gmail.com>
Date:   Mon, 21 Aug 2023 09:50:15 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Michał Mirosław <mirq-linux@...e.qmqm.pl>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        Dmitry Osipenko <digetx@...il.com>
Subject: Re: [PATCH 2/6] regulator: core: skip nesting lock for -EDEADLK

Hi,

On Sat, Aug 19, 2023 at 3:46 PM Michał Mirosław <mirq-linux@...e.qmqm.pl> wrote:
>
> When ww_mutex_lock() returns -EDEADLK the nesting mutex-protected
> section becomes a no-op. Return early and avoid the extra lock.
>
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> ---
>  drivers/regulator/core.c | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)

Reviewed-by: Douglas Anderson <dianders@...omium.org>