in mca_mtl_mxm, don't allow negative tags for MPI_ANY_TAG

This commit was SVN r26128.

ompi/mca/mtl/mxm/mtl_mxm_probe.c

@@ -20,11 +20,8 @@ int ompi_mtl_mxm_iprobe(struct mca_mtl_base_module_t* mtl,
     mxm_error_t err;
     mxm_recv_req_t req;
 
-    req.base.state      = MXM_REQ_NEW;
-    req.base.mq         = (mxm_mq_h)comm->c_pml_comm;
-    req.tag        		= tag;
-    req.tag_mask   		= (tag == MPI_ANY_TAG) ? 0 : 0xffffffffU;
-    req.base.conn       = (src == MPI_ANY_SOURCE) ? NULL : ompi_mtl_mxm_conn_lookup(comm, src);
+    req.base.state = MXM_REQ_NEW;
+    ompi_mtl_mxm_set_recv_envelope(&req, comm, src, tag);
 
     err = mxm_req_probe(&req);
     if (MXM_OK == err) {

ompi/mca/mtl/mxm/mtl_mxm_recv.c

@@ -63,9 +63,8 @@ int ompi_mtl_mxm_irecv(struct mca_mtl_base_module_t* mtl,
     mxm_recv_req = &mtl_mxm_request->mxm.recv;
 
     mxm_recv_req->base.state               = MXM_REQ_NEW;
-    mxm_recv_req->base.mq                  = ompi_mtl_mxm_mq_lookup(comm);
-    mxm_recv_req->base.conn                = (src == MPI_ANY_SOURCE) ? NULL :
-                                             ompi_mtl_mxm_conn_lookup(comm, src);
+    ompi_mtl_mxm_set_recv_envelope(mxm_recv_req, comm, src, tag);
+
     mxm_recv_req->base.flags               = 0;
     mxm_recv_req->base.data_type           = MXM_REQ_DATA_BUFFER;
     mxm_recv_req->base.data.buffer.ptr     = mtl_mxm_request->buf;
@@ -73,8 +72,6 @@ int ompi_mtl_mxm_irecv(struct mca_mtl_base_module_t* mtl,
     mxm_recv_req->base.data.buffer.mkey    = MXM_MKEY_NONE;
     mxm_recv_req->base.context             = mtl_mxm_request;
     mxm_recv_req->base.completed_cb        = ompi_mtl_mxm_recv_completion_cb;
-    mxm_recv_req->tag                      = tag;
-    mxm_recv_req->tag_mask                 = (tag == MPI_ANY_TAG) ? 0 : 0xffffffffU;
 
     /* post-recv */
     err = mxm_req_recv(mxm_recv_req);

ompi/mca/mtl/mxm/mtl_mxm_types.h

@@ -68,6 +68,22 @@ static inline int ompi_mtl_mxm_to_mpi_status(mxm_error_t status) {
     }
 }
 
+static inline void ompi_mtl_mxm_set_recv_envelope(mxm_recv_req_t *req,
+                                                  struct ompi_communicator_t *comm,
+                                                  int src, int tag) {
+    req->base.mq    = (mxm_mq_h)comm->c_pml_comm;
+    req->base.conn  = (src == MPI_ANY_SOURCE)
+                           ? NULL
+                           : ompi_mtl_mxm_conn_lookup(comm, src);
+    if (tag == MPI_ANY_TAG) {
+        req->tag      = 0;
+        req->tag_mask = 0x80000000U; /* MPI_ANY_TAG should not match against negative tags */
+    } else {
+        req->tag      = tag;
+        req->tag_mask = 0xffffffffU;
+    }
+}
+
 END_C_DECLS
 
 #endif