diff options
| author |   Sean Hefty <sean.hefty@intel.com> | 2007-11-30 17:30:18 -0800 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2008-01-25 14:15:31 -0800 |
| commit | b61d92d8ae6aa13b17d1c31e69d123879cec2ee2 (patch) | |
| tree | a6627de06dfccda28a25a5a5f29fc3bcbef50350 | |
| parent | IB/cm: Add basic performance counters (diff) | |
| download | linux-dev-b61d92d8ae6aa13b17d1c31e69d123879cec2ee2.tar.xz linux-dev-b61d92d8ae6aa13b17d1c31e69d123879cec2ee2.zip | |
IB/mad: Fix incorrect access to items on local_list
In cancel_mads(), MADs are moved from the wait_list and local_list
to a cancel_list for processing. However, the structures on these two
lists are not the same. The wait_list references struct
ib_mad_send_wr_private, but local_list references struct
ib_mad_local_private. Cancel_mads() treats all items moved to the
cancel_list as struct ib_mad_send_wr_private. This leads to a system
crash when requests are moved from the local_list to the cancel_list.
Fix this by leaving local_list alone. All requests on the local_list
have completed are just awaiting processing by a queued worker thread.
Bug (crash) reported by Dotan Barak <dotanb@dev.mellanox.co.il>.
Problem with local_list access reported by Robert Reynolds
<rreynolds@opengridcomputing.com>.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/core/mad.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c index 5eace995836d..fbe16d5250a4 100644 --- a/drivers/infiniband/core/mad.c +++ b/drivers/infiniband/core/mad.c @@ -2275,8 +2275,6 @@ static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) /* Empty wait list to prevent receives from finding a request */ list_splice_init(&mad_agent_priv->wait_list, &cancel_list); - /* Empty local completion list as well */ - list_splice_init(&mad_agent_priv->local_list, &cancel_list); spin_unlock_irqrestore(&mad_agent_priv->lock, flags); /* Report all cancelled requests */ |