bridge: Allow forward delay to be cfgd when STP enabled

Allow bridge forward delay to be configured when Spanning Tree is enabled.
Signed-off-by: Ian Wilson <iwilson@brocade.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_stp.c

@@ -576,17 +576,12 @@ void __br_set_forward_delay(struct net_bridge *br, unsigned long t)
 int br_set_forward_delay(struct net_bridge *br, unsigned long val)
 {
 	unsigned long t = clock_t_to_jiffies(val);
-	int err = -ERANGE;
 
-	spin_lock_bh(&br->lock);
-	if (br->stp_enabled != BR_NO_STP &&
-	    (t < BR_MIN_FORWARD_DELAY || t > BR_MAX_FORWARD_DELAY))
-		goto unlock;
+	if (t < BR_MIN_FORWARD_DELAY || t > BR_MAX_FORWARD_DELAY)
+		return -ERANGE;
 
+	spin_lock_bh(&br->lock);
 	__br_set_forward_delay(br, t);
-	err = 0;
-
-unlock:
 	spin_unlock_bh(&br->lock);
-	return err;
+	return 0;
 }