From: Jack Morgenstein <jackm@dev.mellanox.co.il>
Date: Tue, 20 May 2008 22:41:09 +0000 (-0700)
Subject: IPoIB: Test for NULL broadcast object in ipiob_mcast_join_finish()
X-Git-Tag: v2.6.26-rc4~58^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1d50dce5af77cb6d33555af70e2b8748dd84009;p=pandora-kernel.git

IPoIB: Test for NULL broadcast object in ipiob_mcast_join_finish()

We saw a kernel oops in our regression testing when a multicast "join
finish" occurred just after the interface was -- this is
<https://bugs.openfabrics.org/show_bug.cgi?id=1040>.  The test
randomly causes the HCA physical port to go down then up.

The cause of this is that ipoib_mcast_join_finish() processing happen
just after ipoib_mcast_dev_flush() was invoked (in which case the
broadcast pointer is NULL).  This patch tests for and handles the case
where priv->broadcast is NULL.

Cc: <stable@kernel.org>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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