From 38d2f38be9e4a2f1e3324c973a903aa972f71d0f Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Wed, 14 May 2008 22:35:04 -0700
Subject: [PATCH] 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>
---
 drivers/net/bonding/bond_sysfs.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 68c41a00d93d..08f3d396bcd6 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;
-- 
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