[PATCH] bonding: get slave name from actual slave instead of param list

Take the primary slave name shown in /proc from the actual slave dev
instead of from the command-line parameter, which won't be present
if the bond is created via sysfs.
Signed-off-by: NMitch Williams <mitch.a.williams@intel.com>
Acked-by: NJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/bonding/bond_main.c

@@ -3278,8 +3278,8 @@ static void bond_info_show_master(struct seq_file *seq)
 
 	if (USES_PRIMARY(bond->params.mode)) {
 		seq_printf(seq, "Primary Slave: %s\n",
-			   (bond->params.primary[0]) ?
-			   	bond->params.primary : "None");
+			   (bond->primary_slave) ?
+			   bond->primary_slave->dev->name : "None");
 
 		seq_printf(seq, "Currently Active Slave: %s\n",
 			   (curr) ? curr->dev->name : "None");