From: Patrick McHardy <kaber@trash.net>
Date: Tue, 27 Mar 2007 01:15:37 +0000 (-0700)
Subject: NET_SCHED: Fix ingress qdisc locking.
X-Git-Tag: v2.6.20.5~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d50dceccd79e5890d08adb40a538f1ac6dfe89d;p=thirdparty%2Fkernel%2Fstable.git

NET_SCHED: Fix ingress qdisc locking.

[NET_SCHED]: Fix ingress locking

Ingress queueing uses a seperate lock for serializing enqueue operations,
but fails to properly protect itself against concurrent changes to the
qdisc tree. Use queue_lock for now since the real fix it quite intrusive.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index e660cb57e42a0..295f8f9d22dfc 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1750,10 +1750,10 @@ static int ing_filter(struct sk_buff *skb)
 
 		skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS);
 
-		spin_lock(&dev->ingress_lock);
+		spin_lock(&dev->queue_lock);
 		if ((q = dev->qdisc_ingress) != NULL)
 			result = q->enqueue(skb, q);
-		spin_unlock(&dev->ingress_lock);
+		spin_unlock(&dev->queue_lock);
 
 	}