Propagate the error up to the user.

Make sure to reset the generalized request to guarantee not to call the
free callback a second time.

Signed-off-by: George Bosilca <[email protected]>

Author: bosilca

ompi/request/grequest.c

@@ -37,9 +37,36 @@
  */
 static int ompi_grequest_free(ompi_request_t** req)
 {
-    OBJ_RELEASE(*req);
-    *req = MPI_REQUEST_NULL;
-    return OMPI_SUCCESS;
+    ompi_grequest_t* greq = (ompi_grequest_t*)*req;
+    int rc = OMPI_SUCCESS;
+
+    if (NULL != greq->greq_free.c_free) {
+        /* We were already putting query_fn()'s return value into
+         * status.MPI_ERROR but for MPI_{Wait,Test}*.  If there's a
+         * free callback to invoke, the standard says to use the
+         * return value from free_fn() callback, too.
+         */
+        if (greq->greq_funcs_are_c) {
+            greq->greq_base.req_status.MPI_ERROR =
+                greq->greq_free.c_free(greq->greq_state);
+        } else {
+            MPI_Fint ierr;
+            greq->greq_free.f_free((MPI_Aint*)greq->greq_state, &ierr);
+            greq->greq_base.req_status.MPI_ERROR =
+                OMPI_FINT_2_INT(ierr);
+        }
+        rc = greq->greq_base.req_status.MPI_ERROR;
+    }
+    if (OMPI_SUCCESS == rc ) {
+        OBJ_RELEASE(*req);
+        *req = MPI_REQUEST_NULL;
+    } else {
+        /* Make sure we will not be calling the grequest free function
+         * a second time when we release the request.
+         */
+        greq->greq_free.c_free = NULL;
+    }
+    return rc;
 }
 
 static int ompi_grequest_cancel(ompi_request_t* req, int flag)
@@ -122,23 +149,6 @@ static void ompi_grequest_construct(ompi_grequest_t* greq)
  */
 static void ompi_grequest_destruct(ompi_grequest_t* greq)
 {
-    if (greq->greq_free.c_free != NULL) {
-        /* We were already putting query_fn()'s return value into
-         * status.MPI_ERROR but for MPI_{Wait,Test}*.  If there's a
-         * free callback to invoke, the standard says to use the
-         * return value from free_fn() callback, too.
-         */
-        if (greq->greq_funcs_are_c) {
-            greq->greq_base.req_status.MPI_ERROR =
-                greq->greq_free.c_free(greq->greq_state);
-        } else {
-            MPI_Fint ierr;
-            greq->greq_free.f_free((MPI_Aint*)greq->greq_state, &ierr);
-            greq->greq_base.req_status.MPI_ERROR =
-                OMPI_FINT_2_INT(ierr);
-        }
-    }
-
     OMPI_REQUEST_FINI(&greq->greq_base);
 }