bonding: fix panic if initialization fails

If module initialisation failed (e.g. because the bonding sysfs entry
cannot be created), kernel panics:
 IP: [<ffffffff8024910a>] destroy_workqueue+0x2d/0x146
Call Trace:
 [<ffffffff808268c4>] bond_destructor+0x28/0x78
 [<ffffffff80b64471>] netdev_run_todo+0x231/0x25a
 [<ffffffff80b6dbcd>] rtnl_unlock+0x9/0xb
 [<ffffffff81567907>] bonding_init+0x83e/0x84a

Remove the calls to bond_work_cancel_all() and destroy_workqueue();
both are also called/scheduled via bond_free_all().

bond_destroy_sysfs is unecessary because the sysfs entry has
not been created in the error case.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: NJiri Pirko <jpirko@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -5181,7 +5181,6 @@ static int __init bonding_init(void)
 {
 	int i;
 	int res;
-	struct bonding *bond;
 
 	printk(KERN_INFO "%s", version);
 
@@ -5212,13 +5211,6 @@ static int __init bonding_init(void)
 
 	goto out;
 err:
-	list_for_each_entry(bond, &bond_dev_list, bond_list) {
-		bond_work_cancel_all(bond);
-		destroy_workqueue(bond->wq);
-	}
-
-	bond_destroy_sysfs();
-
 	rtnl_lock();
 	bond_free_all();
 	rtnl_unlock();