From 50df48f59d656d58a1734df5cfe00cdc9a74e8b5 Mon Sep 17 00:00:00 2001 From: Yossi Etigin Date: Mon, 12 Jan 2009 19:28:42 -0800 Subject: [PATCH] IPoIB: Do not join broadcast group if interface is brought down Because the ipoib_workqueue is not flushed when ipoib interface is brought down, ipoib_mcast_join() may trigger a join to the broadcast group after priv->broadcast was set to NULL (during cleanup). This will cause the system to be a member of the broadcast group when interface is down. As a side effect, this breaks the optimization of setting the Q_key only when joining the broadcast group. Signed-off-by: Yossi Etigin Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index a2eb3b9789e..59d02e0b8df 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -529,6 +529,9 @@ void ipoib_mcast_join_task(struct work_struct *work) if (!priv->broadcast) { struct ipoib_mcast *broadcast; + if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) + return; + broadcast = ipoib_mcast_alloc(dev, 1); if (!broadcast) { ipoib_warn(priv, "failed to allocate broadcast group\n");