bridge: Correctly clamp MAX forward_delay when enabling STP
Vlad Yasevich [Tue, 15 Oct 2013 18:57:45 +0000 (14:57 -0400)]
[ Upstream commit 4b6c7879d84ad06a2ac5b964808ed599187a188d ]

Commit be4f154d5ef0ca147ab6bcd38857a774133f5450
bridge: Clamp forward_delay when enabling STP
had a typo when attempting to clamp maximum forward delay.

It is possible to set bridge_forward_delay to be higher then
permitted maximum when STP is off.  When turning STP on, the
higher then allowed delay has to be clamed down to max value.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/bridge/br_stp_if.c

index 108084a..656a6f3 100644 (file)
@@ -134,7 +134,7 @@ static void br_stp_start(struct net_bridge *br)
 
        if (br->bridge_forward_delay < BR_MIN_FORWARD_DELAY)
                __br_set_forward_delay(br, BR_MIN_FORWARD_DELAY);
-       else if (br->bridge_forward_delay < BR_MAX_FORWARD_DELAY)
+       else if (br->bridge_forward_delay > BR_MAX_FORWARD_DELAY)
                __br_set_forward_delay(br, BR_MAX_FORWARD_DELAY);
 
        if (r == 0) {