Because 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 ipoib to be joined to the
broadcast group when interface is down.
As a side effect, this breaks the optimization of setting qkey only when joining
the broadcast group.
Signed-off-by: Yossi Etigin <[EMAIL PROTECTED]>
--
Fix bugzilla 1370.
Index: b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
===================================================================
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c 2008-11-19
21:33:54.000000000 +0200
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c 2008-11-19
21:40:12.000000000 +0200
@@ -565,7 +565,8 @@ void ipoib_mcast_join_task(struct work_s
ipoib_warn(priv, "ib_query_port failed\n");
}
- if (!priv->broadcast) {
+ rtnl_lock();
+ if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags) && !priv->broadcast) {
struct ipoib_mcast *broadcast;
broadcast = ipoib_mcast_alloc(dev, 1);
@@ -576,6 +577,7 @@ void ipoib_mcast_join_task(struct work_s
queue_delayed_work(ipoib_workqueue,
&priv->mcast_join_task, HZ);
mutex_unlock(&mcast_mutex);
+ rtnl_unlock();
return;
}
@@ -587,6 +589,7 @@ void ipoib_mcast_join_task(struct work_s
__ipoib_mcast_add(dev, priv->broadcast);
spin_unlock_irq(&priv->lock);
}
+ rtnl_unlock();
if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags))
--
--Yossi
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