OSC-RDMA: PSCW fix

related to open-mpi#9540 Signed-off-by: Howard Pritchard <howardp@lanl.gov> (cherry picked from commit e20108c)
hppritcha · Oct 25, 2021 · f15dec8 · f15dec8
1 parent 2fb5690
commit f15dec8
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/ompi/mca/osc/rdma/osc_rdma_active_target.c b/ompi/mca/osc/rdma/osc_rdma_active_target.c
@@ -454,6 +454,11 @@ int ompi_osc_rdma_complete_atomic (ompi_win_t *win)
     OSC_RDMA_VERBOSE(MCA_BASE_VERBOSE_TRACE, "complete: %s", win->w_name);
 
     OPAL_THREAD_LOCK(&module->lock);
+    if (0 == sync->num_peers) {
+        OPAL_THREAD_UNLOCK(&module->lock);
+        return OMPI_SUCCESS;
+    }
+
     if (OMPI_OSC_RDMA_SYNC_TYPE_PSCW != sync->type) {
         OPAL_THREAD_UNLOCK(&module->lock);
         return OMPI_ERR_RMA_SYNC;