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authorRalph Campbell <ralph.campbell@qlogic.com>2009-03-03 14:22:17 -0800
committerRoland Dreier <rolandd@cisco.com>2009-03-03 14:22:17 -0800
commit4780c1953f9bef07365b13af01ae4e8238ecd3de (patch)
treece68e77fc5ad410b9c320cf80ad7f76faa1bc7f1 /include/rdma
parentd9620a4c82c61a91c9313f80ba951c902573c028 (diff)
IB/mad: Fix ib_post_send_mad() returning 0 with no generate send comp
If ib_post_send_mad() returns 0, the API guarantees that there will be a callback to send_buf->mad_agent->send_handler() so that the sender can call ib_free_send_mad(). Otherwise, the ib_mad_send_buf will be leaked and the mad_agent reference count will never go to zero and the IB device module cannot be unloaded. The above can happen without this patch if process_mad() returns (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED). If process_mad() returns IB_MAD_RESULT_SUCCESS and there is no agent registered to receive the mad being sent, handle_outgoing_dr_smp() returns zero which causes a MAD packet which is at the end of the directed route to be incorrectly sent on the wire but doesn't cause a hang since the HCA generates a send completion. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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