linux-kernel - Re: [RESEND PATCH 1/2] pinctrl: st: avoid multiple mutex lock

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Message-ID: <54AD0AD9.3010308@st.com>
Date:	Wed, 7 Jan 2015 11:30:49 +0100
From:	Patrice Chotard <patrice.chotard@...com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RESEND PATCH 1/2] pinctrl: st: avoid multiple mutex lock

Hi Linus
On 01/07/2015 10:44 AM, Linus Walleij wrote:
> On Mon, Jan 5, 2015 at 11:04 AM, Patrice CHOTARD <patrice.chotard@...com> wrote:
>
>> From: Francesco VIRLINZI <francesco.virlinzi@...com>
>>
>> Using the sysfs inteface to inspect the pins configuration
>> the system can walk around a path which acquires the same
>> mutex twice.
>>
>> On STiH407 platform, for example :
>> cat /sys/kernel/debug/pinctrl/920f080.pin-controller-front0/pinconf-pins
>> hangs the kernel and never returns.
>>
>> With this patch the mutex is temporary freed.
>>
>> Signed-off-by: Francesco Virlinzi <francesco.virlinzi@...com>
>> Signed-off-by: Patrice Chotard <patrice.chotard@...com>
> Patch applied to fixes. Sorry for the delay.

Don't worry ;-)

Thanks

>
> Yours,
> Linus Walleij

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