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PHY: remove rwsem use from phy core

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The subsystem rwsem is not used by the driver core at all, so the use of
it in the phy code doesn't make any sense.  They might possibly
want to use a local lock, but I am unsure about that.

Cc: netdev <netdev@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-04-09 11:52:31 -04:00
parent a2a0f74dc1
commit 87aebe078e
2 changed files with 1 additions and 14 deletions
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6
drivers/net/phy/fixed.c
View File

@ -276,21 +276,15 @@ static int fixed_mdio_register_device(int number, int speed, int duplex)
artificially, we are binding the driver here by hand;
it will be the same for all the fixed phys anyway.
*/
down_write(&phydev->dev.bus->subsys.rwsem);
phydev->dev.driver = &fixed_mdio_driver.driver;
err = phydev->dev.driver->probe(&phydev->dev);
if(err < 0) {
printk(KERN_ERR "Phy %s: problems with fixed driver\n",phydev->dev.bus_id);
up_write(&phydev->dev.bus->subsys.rwsem);
goto probe_fail;
}
err = device_bind_driver(&phydev->dev);
up_write(&phydev->dev.bus->subsys.rwsem);
if (err)
goto probe_fail;

9
drivers/net/phy/phy_device.c
View File

@ -208,16 +208,12 @@ struct phy_device *phy_attach(struct net_device *dev,
* exist, and we should use the genphy driver. */
if (NULL == d->driver) {
int err;
down_write(&d->bus->subsys.rwsem);
d->driver = &genphy_driver.driver;
err = d->driver->probe(d);
if (err >= 0)
err = device_bind_driver(d);
up_write(&d->bus->subsys.rwsem);
if (err)
return ERR_PTR(err);
}
@ -258,11 +254,8 @@ void phy_detach(struct phy_device *phydev)
* was using the generic driver), we unbind the device
* from the generic driver so that there's a chance a
* real driver could be loaded */
if (phydev->dev.driver == &genphy_driver.driver) {
down_write(&phydev->dev.bus->subsys.rwsem);
if (phydev->dev.driver == &genphy_driver.driver)
device_release_driver(&phydev->dev);
up_write(&phydev->dev.bus->subsys.rwsem);
}
}
EXPORT_SYMBOL(phy_detach);