Message-ID: <5018FFE4.4010508@pengutronix.de>
Date: Wed, 01 Aug 2012 12:07:32 +0200
From: Marc Kleine-Budde <mkl@pengutronix.de>
Organization: Pengutronix e.K.
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To: Fabio Baltieri <fabio.baltieri@gmail.com>
CC: linux-can@vger.kernel.org, linux-kernel@vger.kernel.org,
        Oliver Hartkopp <socketcan@hartkopp.net>,
        Wolfgang Grandegger <wg@grandegger.com>
Subject: Re: [PATCH can-next v4] can: add tx/rx LED trigger support
References: <5017C8E4.4020003@pengutronix.de> <1343772338-1526-1-git-send-email-fabio.baltieri@gmail.com> <5018F8B3.6080404@pengutronix.de>
In-Reply-To: <5018F8B3.6080404@pengutronix.de>
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On 08/01/2012 11:36 AM, Marc Kleine-Budde wrote:
[...]

>> +/*
>> + * Register CAN LED triggers for a CAN device
>> + *
>> + * This is normally called from a driver's probe function
>> + */
>> +void can_led_init(struct net_device *netdev)
>> +{
>> +	struct can_priv *priv =3D netdev_priv(netdev);
>> +	void *res;
>> +
>> +	res =3D devres_alloc(can_led_release, 0, GFP_KERNEL);
>                                             ^
> I'm not really sure if this is working. For example, pinctrl [1]
> allocates a double pointer here. The res pointer here and in
> can_led_release simply points to invalid memory. But as long as you
> don't dereference it, it should work.
>=20
> [1] http://lxr.free-electrons.com/source/drivers/pinctrl/core.c#L862

The pinctrl usecase if different, pinctrl needs that extra memory
because they cannot get a reference to their pinctrl they have to put.

Marc

--=20
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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