From: Stephen Hemminger <shemminger@vyatta.com>
Date: Thu, 15 May 2008 05:35:04 +0000 (-0700)
Subject: bonding: handle case of device named bonding_master
X-Git-Tag: v3.12-rc1~20510^2~37
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=38d2f38be9e4a2f1e3324c973a903aa972f71d0f;p=kernel%2Fkernel-generic.git

bonding: handle case of device named bonding_master

If device already exists named bonding_masters, then fail. This is a wierd
corner case only a QA group could love.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 68c41a0..08f3d39 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1437,8 +1437,16 @@ int bond_create_sysfs(void)
 	 * configure multiple bonding devices.
 	 */
 	if (ret == -EEXIST) {
-		netdev_class = NULL;
-		return 0;
+		/* Is someone being kinky and naming a device bonding_master? */
+		if (__dev_get_by_name(&init_net,
+				      class_attr_bonding_masters.attr.name))
+			printk(KERN_ERR
+			       "network device named %s already exists in sysfs",
+			       class_attr_bonding_masters.attr.name);
+		else {
+			netdev_class = NULL;
+			return 0;
+		}
 	}
 
 	return ret;