[IrDA]: Fix RCU lock pairing on error path

irlan_client_discovery_indication calls rcu_read_lock and rcu_read_unlock, but
returns without unlocking in an error case. Fix that by replacing the return
with a goto so that the rcu_read_unlock always gets executed.

Signed-off-by: Josh Triplett <[e-mail]>
Acked-by: Paul E. McKenney <[e-mail]>
Signed-off-by: Samuel Ortiz [e-mail] <>
Signed-off-by: David S. Miller <[e-mail]>

net/irda/irlan/irlan_client.c

···
 	rcu_read_lock();
 	self = irlan_get_any();
 	if (self) {
-		IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
+		IRDA_ASSERT(self->magic == IRLAN_MAGIC, goto out;);
 
 		IRDA_DEBUG(1, "%s(), Found instance (%08x)!\n", __FUNCTION__ ,
 		      daddr);
 		
 		irlan_client_wakeup(self, saddr, daddr);
 	}
+IRDA_ASSERT_LABEL(out:)
 	rcu_read_unlock();
 }