From: Francois Romieu <romieu@electric-eye.fr.zoreil.com>
Date: Wed, 30 Nov 2005 21:32:13 +0000 (+0100)
Subject: b44: early return in dev->do_ioctl when the device is not up
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1050.54~51819^2~13^2~1
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=3410572d519b6c68505f746f25033de97809eaa1;p=mirror_ubuntu-artful-kernel.git

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>
---

diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index c8d9b4d66704..e0ec777d96df 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -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;
 }