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phylib: fix premature freeing of struct mii_bus 

Commit 46abc02175 ("phylib: give mdio
buses a device tree presence") added a call to device_unregister() in
a situation where the caller did not intend for the device to be
freed yet, but apart from just unregistering the device from the
system, device_unregister() does an additional put_device() that is
intended to free it.

The right function to use in this situation is device_del(), which
unregisters the device from the system like device_unregister() does,
but without dropping the reference count an additional time.

Bug report from Bryan Wu <cooloney@kernel.org>.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Lennert Buytenhek 2008-11-09 05:34:47 +01:00 committed by Jeff Garzik
parent 3b259e3659
commit 3e44017b58
1 changed files with 1 additions and 1 deletions
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2
drivers/net/phy/mdio_bus.c
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@ -136,7 +136,7 @@ void mdiobus_unregister(struct mii_bus *bus)
BUG_ON(bus->state != MDIOBUS_REGISTERED);
bus->state = MDIOBUS_UNREGISTERED;
device_unregister(&bus->dev);
device_del(&bus->dev);
for (i = 0; i < PHY_MAX_ADDR; i++) {
if (bus->phy_map[i])
device_unregister(&bus->phy_map[i]->dev);