linux-kernel - [PATCH 3.11 34/66] bridge: Correctly clamp MAX forward

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Date:	Fri,  1 Nov 2013 15:07:10 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Vlad Yasevich <vyasevic@...hat.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Stephen Hemminger <shemminger@...tta.com>,
	Veaceslav Falico <vfalico@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.11 34/66] bridge: Correctly clamp MAX forward_delay when enabling STP

3.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vlad Yasevich <vyasevic@...hat.com>

[ 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@...hat.com>
CC: Herbert Xu <herbert@...dor.apana.org.au>
CC: Stephen Hemminger <shemminger@...tta.com>
Reviewed-by: Veaceslav Falico <vfalico@...hat.com>
Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/bridge/br_stp_if.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -134,7 +134,7 @@ static void br_stp_start(struct net_brid
 
 	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) {


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