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 = netdev_priv(netdev);
>> +	void *res;
>> +
>> +	res = 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.
> 
> [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

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