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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>
This commit is contained in:
Yossi Etigin 2009-01-12 19:28:42 -08:00 committed by Roland Dreier
parent a50df398cd
commit 50df48f59d
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/ulp/ipoib/ipoib_multicast.c
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@ -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");