librdmacm: Ack the pending event in sync UD connection

When the server accepts a UD connection request in sync mode, the event needs to be acked, otherwise destroying the listening id would get stuck because there is a pending event. For RC, the event is acked in ucma_complete(). Fixes: 332b203 ("librdmacm: Do not wait in rdma_accept for UD QPs") Signed-off-by: Oren Sidi <[email protected]> Reviewed-by: Leon Romanovsky <[email protected]> Reviewed-by: Sean Hefty <[email protected]> Signed-off-by: Yishai Hadas <[email protected]>
linux-rdma · May 5, 2024 · 9a0fc3a · 9a0fc3a
1 parent 3be5661
commit 9a0fc3a
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/librdmacm/cma.c b/librdmacm/cma.c
@@ -1951,8 +1951,14 @@ int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
  return (ret >= 0) ? ERR(ENODATA) : -1;
  }
 
- if (ucma_is_ud_qp(id->qp_type))
+ if (ucma_is_ud_qp(id->qp_type)) {
+ if (id_priv->sync && id_priv->id.event) {
+ rdma_ack_cm_event(id_priv->id.event);
+ id_priv->id.event = NULL;
+ }
+
  return 0;
+ }
 
  return ucma_complete(id);
 }