Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754531AbaDRQgN (ORCPT ); Fri, 18 Apr 2014 12:36:13 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:42388 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754225AbaDRQeN (ORCPT ); Fri, 18 Apr 2014 12:34:13 -0400 From: Grygorii Strashko To: Florian Fainelli , CC: Randy Dunlap , Jonathan Cameron , "David S. Miller" , , , Sekhar Nori , , , , , Grygorii Strashko Subject: [PATCH v2 1/4] mdio_bus: implement devm_mdiobus_alloc/devm_mdiobus_free Date: Fri, 18 Apr 2014 20:24:54 +0300 Message-ID: <1397841897-9170-2-git-send-email-grygorii.strashko@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1397841897-9170-1-git-send-email-grygorii.strashko@ti.com> References: <1397841897-9170-1-git-send-email-grygorii.strashko@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Grygorii Strashko --- Documentation/driver-model/devres.txt | 4 ++ drivers/net/phy/mdio_bus.c | 68 +++++++++++++++++++++++++++++++++ include/linux/phy.h | 2 + 3 files changed, 74 insertions(+) diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index 4f7897e..31aa066 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -308,3 +308,7 @@ SLAVE DMA ENGINE SPI devm_spi_register_master() + +MDIO + devm_mdiobus_alloc() + devm_mdiobus_free() diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c 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) } EXPORT_SYMBOL(mdiobus_alloc_size); +static void _devm_mdiobus_free(struct device *dev, void *res) +{ + mdiobus_free(*(struct mii_bus **)res); +} + +static int devm_mdiobus_match(struct device *dev, void *res, void *data) +{ + struct mii_bus **r = res; + + if (WARN_ON(!r || !*r)) + return 0; + + return *r == data; +} + +/** + * 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); + if (bus) { + *ptr = bus; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return bus; +} +EXPORT_SYMBOL_GPL(devm_mdiobus_alloc); + +/** + * devm_mdiobus_free - Resource-managed mdiobus_free() + * @dev: Device this mii_bus belongs to + * @bus: the mii_bus associated with the device + * + * Free mii_bus allocated with devm_mdiobus_alloc(). + */ +void devm_mdiobus_free(struct device *dev, struct mii_bus *bus) +{ + int rc; + + rc = devres_release(dev, _devm_mdiobus_free, + devm_mdiobus_match, bus); + WARN_ON(rc); +} +EXPORT_SYMBOL_GPL(devm_mdiobus_free); + /** * mdiobus_release - mii_bus device release callback * @d: the target struct device that contains the mii_bus diff --git a/include/linux/phy.h b/include/linux/phy.h index 24126c4..2238bea 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -195,6 +195,8 @@ static inline struct mii_bus *mdiobus_alloc(void) int mdiobus_register(struct mii_bus *bus); void mdiobus_unregister(struct mii_bus *bus); void mdiobus_free(struct mii_bus *bus); +struct mii_bus *devm_mdiobus_alloc(struct device *dev, int sizeof_priv); +void devm_mdiobus_free(struct device *dev, struct mii_bus *bus); struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr); int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum); int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/