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authorStephen Hemminger <shemminger@osdl.org>2006-03-03 17:14:51 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-04 21:06:19 -0800
commit6e86b89084a60355f0e1fb876ca0cfbca62ee85c (patch)
tree076b621fad864de984661a9a15bd526bc068776b
parentMerge branch 'upstream-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 (diff)
downloadlinux-dev-6e86b89084a60355f0e1fb876ca0cfbca62ee85c.tar.xz
linux-dev-6e86b89084a60355f0e1fb876ca0cfbca62ee85c.zip
[BRIDGE]: fix crash in STP
Bridge would crash because of uninitailized timer if STP is used and device was inserted into a bridge before bridge was up. This got introduced when the delayed port checking was added. Fix is to not enable STP on port unless bridge is up. Bugzilla: http://bugzilla.kernel.org/show_bug.cgi?id=6140 Dup: http://bugzilla.kernel.org/show_bug.cgi?id=6156 Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_if.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 7fa3a5a9971f..8b38c839d539 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -81,26 +81,27 @@ static void port_carrier_check(void *arg)
{
struct net_device *dev = arg;
struct net_bridge_port *p;
+ struct net_bridge *br;
rtnl_lock();
p = dev->br_port;
if (!p)
goto done;
-
- if (netif_carrier_ok(p->dev)) {
- u32 cost = port_cost(p->dev);
-
- spin_lock_bh(&p->br->lock);
- if (p->state == BR_STATE_DISABLED) {
- p->path_cost = cost;
- br_stp_enable_port(p);
+ br = p->br;
+
+ if (netif_carrier_ok(dev))
+ p->path_cost = port_cost(dev);
+
+ if (br->dev->flags & IFF_UP) {
+ spin_lock_bh(&br->lock);
+ if (netif_carrier_ok(dev)) {
+ if (p->state == BR_STATE_DISABLED)
+ br_stp_enable_port(p);
+ } else {
+ if (p->state != BR_STATE_DISABLED)
+ br_stp_disable_port(p);
}
- spin_unlock_bh(&p->br->lock);
- } else {
- spin_lock_bh(&p->br->lock);
- if (p->state != BR_STATE_DISABLED)
- br_stp_disable_port(p);
- spin_unlock_bh(&p->br->lock);
+ spin_unlock_bh(&br->lock);
}
done:
rtnl_unlock();