[openib-general] Local QP operation err while sending packet over UD transport

[Venkatesh Babu]

 Hi,

  I am using verbs layer in OpenIB of linux kernel 2.6.13.1 and Mellanox HCA (CA type: MT25208, Number of ports: 2, Firmware version: 5.0.1, Hardware version: a0). I have created a QP with Unreliable Datagram transport to communicate with another similar system through Mallanox IB switch. I created a QP and transitioned it to RTS state and created first packet and posted it to the send queue successfully and later got a response in completion queue with an error status IB_WC_LOC_QP_OP_ERR. Opcode field of ib_wc structure was showing some unrealistic value 18177 and vendor_err as 469a0400. And also I got the following output in /var/log/messages. 
Oct  1 18:29:56 york kernel: ib_mthca 0000:07:00.0: local QP operation err (QPN 00040c, WQE @ 00002005, CQN 00008a, index 0)
Oct  1 18:29:56 york kernel: ib_mthca 0000:07:00.0: CQE contents 0000040c b3000000 fd000000 11000000 026f0000 00000010 00002005 ff100000

   I am not sure what this error means. Please somebody help me in debugging this problem and sending my first packet over the IB.

Thanks,
 VBabu
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