From: Michael S. Tsirkin <mst@mellanox.co.il>
Date: Wed, 8 Feb 2006 00:37:08 +0000 (-0800)
Subject: IPoIB: Don't start send-only joins while multicast thread is stopped
X-Git-Tag: v2.6.16-rc4~83^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=479a079663bd4c5f3d2714643b1b8c406aaba3e0;p=pandora-kernel.git

IPoIB: Don't start send-only joins while multicast thread is stopped

Fix the following race scenario:
  - Device is up.
  - Port event or set mcast list triggers ipoib_mcast_stop_thread,
    this cancels the query and waits on mcast "done" completion.
  - Completion is called and "done" is set.
  - Meanwhile, ipoib_mcast_send arrives and starts a new query,
    re-initializing "done".

Fix this by adding a "multicast started" bit and checking it before
starting a send-only join.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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