diff options
| author | Petr Malat <oss@malat.biz> | 2013-02-28 05:01:52 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-01 00:37:30 +0400 |
| commit | b2a431915d19893f047e0dd149d0c1b9d2a0b960 (patch) | |
| tree | e3e507b869479b8ba8b09667b159c3dbc606cf4c /drivers/net | |
| parent | d521de04a73abb5e662c12eafa8c839aaaa6ae4f (diff) | |
| download | linux-b2a431915d19893f047e0dd149d0c1b9d2a0b960.tar.xz | |
phy: Fix phy_device_free memory leak
Fix memory leak in phy_device_free() for the case when phy_device*
returned by phy_device_create() is not registered in the system.
Bug description:
phy_device_create() sets name of kobject using dev_set_name(), which
allocates memory using kvasprintf(), but this memory isn't freed if
the underlying device isn't registered properly, because kobject_cleanup()
is not called in that case. This can happen (and actually is happening on
our machines) if phy_device_register(), called by mdiobus_scan(), fails.
Patch description:
Embedded struct device is initialized in phy_device_create() and it
counterpart phy_device_free() just drops one reference to the device,
which leads to proper deinitialization including releasing the kobject
name memory.
Signed-off-by: Petr Malat <oss@malat.biz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 9930f9999561..3657b4a29124 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -44,13 +44,13 @@ MODULE_LICENSE("GPL"); void phy_device_free(struct phy_device *phydev) { - kfree(phydev); + put_device(&phydev->dev); } EXPORT_SYMBOL(phy_device_free); static void phy_device_release(struct device *dev) { - phy_device_free(to_phy_device(dev)); + kfree(to_phy_device(dev)); } static struct phy_driver genphy_driver; @@ -201,6 +201,8 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, there's no driver _already_ loaded. */ request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); + device_initialize(&dev->dev); + return dev; } EXPORT_SYMBOL(phy_device_create); @@ -363,9 +365,9 @@ int phy_device_register(struct phy_device *phydev) /* Run all of the fixups for this PHY */ phy_scan_fixups(phydev); - err = device_register(&phydev->dev); + err = device_add(&phydev->dev); if (err) { - pr_err("phy %d failed to register\n", phydev->addr); + pr_err("PHY %d failed to add\n", phydev->addr); goto out; } |