Add missing checksum calculation. This fixes a checksum mismatch failure while using TCP BTL

This commit was SVN r20927.

ompi/mca/pml/csum/pml_csum_sendreq.c

@@ -651,10 +651,19 @@ int mca_pml_csum_send_request_start_prepare( mca_pml_csum_send_request_t* sendre
     hdr = (mca_pml_csum_hdr_t*)segment->seg_addr.pval;
     hdr->hdr_common.hdr_flags = 0;
     hdr->hdr_common.hdr_type = MCA_PML_CSUM_HDR_TYPE_MATCH;
+    hdr->hdr_common.hdr_csum = 0;
     hdr->hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid;
     hdr->hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank;
     hdr->hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag;
     hdr->hdr_match.hdr_seq = (uint16_t)sendreq->req_send.req_base.req_sequence;
+    hdr->hdr_match.hdr_csum = (size > 0 ?
+        sendreq->req_send.req_base.req_convertor.checksum : OPAL_CSUM_ZERO);
+    hdr->hdr_common.hdr_csum = opal_csum16(hdr, sizeof(mca_pml_csum_match_hdr_t));
+
+    OPAL_OUTPUT_VERBOSE((1, mca_pml_base_output,
+                         "%s:%s:%d Sending \'match\' with data csum:0x%x, header csum:0x%x, size:%lu \n",
+                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), __FILE__, __LINE__,
+                         hdr->hdr_match.hdr_csum, hdr->hdr_common.hdr_csum, (unsigned long)size));
 
     csum_hdr_hton(hdr, MCA_PML_CSUM_HDR_TYPE_MATCH,
                  sendreq->req_send.req_base.req_proc);