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

From: Patrice Chotard
Date: Wed Jan 07 2015 - 05:31:28 EST


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@xxxxxx> wrote:

From: Francesco VIRLINZI <francesco.virlinzi@xxxxxx>

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@xxxxxx>
Signed-off-by: Patrice Chotard <patrice.chotard@xxxxxx>
Patch applied to fixes. Sorry for the delay.

Don't worry ;-)

Thanks


Yours,
Linus Walleij

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/