linux-kernel - Re: [PATCH v2 1/4] mdio_bus: implement devm_mdiobus_alloc/devm_mdiobus

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Message-ID: <5360EBD0.80704@ti.com>
Date:	Wed, 30 Apr 2014 15:25:52 +0300
From:	Grygorii Strashko <grygorii.strashko@...com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	<netdev@...r.kernel.org>
CC:	Randy Dunlap <rdunlap@...radead.org>,
	Jonathan Cameron <jic23@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<prabhakar.csengg@...il.com>, <santosh.shilimkar@...com>,
	Sekhar Nori <nsekhar@...com>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<davinci-linux-open-source@...ux.davincidsp.com>
Subject: Re: [PATCH v2 1/4] mdio_bus: implement devm_mdiobus_alloc/devm_mdiobus_free

On 04/18/2014 08:52 PM, Sergei Shtylyov wrote:
> On 04/18/2014 09:24 PM, Grygorii Strashko wrote:
> 
>> Add a resource managed devm_mdiobus_alloc()/devm_mdiobus_free()
>> to automatically clean up MDIO bus alocations made by MDIO drivers,
>> thus leading to simplified MDIO drivers code.
> 
>> Cc: Florian Fainelli <f.fainelli@...il.com>
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> [...]
> 
>> index 76f54b3..6412beb 100644
>> --- a/drivers/net/phy/mdio_bus.c
>> +++ b/drivers/net/phy/mdio_bus.c
>> @@ -69,6 +69,74 @@ struct mii_bus *mdiobus_alloc_size(size_t size)
> [...]
>> +/**
>> + * devm_mdiobus_alloc - Resource-managed mdiobus_alloc_size()
>> + * @dev:        Device to allocate mii_bus for
>> + * @sizeof_priv:    Space to allocate for private structure.
>> + *
>> + * Managed mdiobus_alloc_size. mii_bus allocated with this function is
>> + * automatically freed on driver detach.
>> + *
>> + * If an mii_bus allocated with this function needs to be freed 
>> separately,
>> + * devm_mdiobus_free() must be used.
>> + *
>> + * RETURNS:
>> + * Pointer to allocated mii_bus on success, NULL on failure.
>> + */
>> +struct mii_bus *devm_mdiobus_alloc(struct device *dev, int sizeof_priv)
>> +{
>> +    struct mii_bus **ptr, *bus;
>> +
>> +    ptr = devres_alloc(_devm_mdiobus_free, sizeof(*ptr),
>> +               GFP_KERNEL);
>> +    if (!ptr)
>> +        return NULL;
>> +
>> +    /* use raw alloc_dr for kmalloc caller tracing */
>> +    bus = mdiobus_alloc_size(sizeof_priv);
> 
>     Since the wrapped function is called mdiobus_alloc_size(), not 
> mdiobus_alloc(), perhaps it's better to call the wrapper 
> devm_mdiobus_alloc_size()?

Agree. I've just sent v3.

Regards,
-grygorii

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