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IB/mad: Return EPROTONOSUPPORT when an RDMA device lacks the QP required 

We had a script which was looping through the devices returned from
ibstat and attempted to register a SMI agent on an ethernet device.
This caused a kernel panic for IBoE devices that don't have QP0.

Fix this by checking if the QP exists before using it.

Signed-off-by: Ira Weiny <weiny2@llnl.gov>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Ira Weiny 2011-05-19 18:19:28 -07:00 committed by Roland Dreier
parent 257313b2a8
commit c8367c4cd9
1 changed files with 7 additions and 0 deletions
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7
drivers/infiniband/core/mad.c
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@ -276,6 +276,13 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
goto error1;
}
/* Verify the QP requested is supported. For example, Ethernet devices
* will not have QP0 */
if (!port_priv->qp_info[qpn].qp) {
ret = ERR_PTR(-EPROTONOSUPPORT);
goto error1;
}
/* Allocate structures */
mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
if (!mad_agent_priv) {