From 50df48f59d656d58a1734df5cfe00cdc9a74e8b5 Mon Sep 17 00:00:00 2001
From: Yossi Etigin <yosefe@Voltaire.COM>
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 <yosefe@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
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 a2eb3b9789eba..59d02e0b8df16 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");
--
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