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b44: early return in dev->do_ioctl when the device is not up 

The device has not gone through a whole reset/init sequence until the
device is up. Accessing the mii interface before this point is not
safe.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
This commit is contained in:
Francois Romieu 2005-11-30 22:32:13 +01:00
parent d9e2d185bf
commit 3410572d51
1 changed files with 5 additions and 2 deletions
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7
drivers/net/b44.c
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@ -1838,12 +1838,15 @@ static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct mii_ioctl_data *data = if_mii(ifr);
struct b44 *bp = netdev_priv(dev);
int err;
int err = -EINVAL;
if (!netif_running(dev))
goto out;
spin_lock_irq(&bp->lock);
err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
spin_unlock_irq(&bp->lock);
out:
return err;
}