linux-kernel - Re: [PATCH] regulator: core: grab supply info before unlocking

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Message-ID: <20160422150701.GG3217@sirena.org.uk>
Date:	Fri, 22 Apr 2016 16:07:01 +0100
From:	Mark Brown <broonie@...nel.org>
To:	John Ogness <john.ogness@...utronix.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: core: grab supply info before unlocking

On Fri, Apr 22, 2016 at 04:33:51PM +0200, John Ogness wrote:
> It is necessary to check if there is a supply while still holding
> the regulator lock. Otherwise a theoretical race can occur that
> someone else can add a supply and then we incorrectly try to
> unlock that newly added regulator.

I don't understand this.  What do you mean by "add a supply"?

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