linux-kernel - Re: [PATCH v3] rfkill: Add rfkill-any LED trigger

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Message-ID: <1483359705.21014.0.camel@sipsolutions.net>
Date:   Mon, 02 Jan 2017 13:21:45 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Michał Kępień <kernel@...pniu.pl>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Михаил Кринкин 
        <krinkin.m.u@...il.com>, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] rfkill: Add rfkill-any LED trigger


> I'm not super happy with this conditional locking - can't we instead
> defer the necessary work to a workqueue, or so, for purposes of the
> LED?

Actually, since you can sleep in here, and do various other things like
scheduling etc. this can't even be correct as is - one thread might be
in the probe and another might also attempt to do some operations that
require the lock but now don't take it.

johannes