event/dsw: flush buffers immediately on zero-sized enqueue

Fix DSW's rte_event_enqueue_burst(), so that a call with a zero-sized
event array immediately flushes the port's output buffers. Prior to
this patch, the flush operation would be deferred to the next enqueue
or dequeue call, which is inconsistent with DSW documentation.

Fixes: 1c8e3caa3bfb ("event/dsw: add event scheduling and device start/stop")
Cc: stable@dpdk.org
Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>

diff --git a/drivers/event/dsw/dsw_event.c b/drivers/event/dsw/dsw_event.c
index 61a66fabf3cddbba478bfdfba2541f5e66227ead..1641c2d06e0008ac6bddc456b8b636be6da7b3e2 100644 (file)
--- a/drivers/event/dsw/dsw_event.c
+++ b/drivers/event/dsw/dsw_event.c
@@ -1047,6 +1047,7 @@ dsw_event_enqueue_burst_generic(void *port, const struct rte_event events[],
         */
        if (unlikely(events_len == 0)) {
                dsw_port_note_op(source_port, DSW_MAX_PORT_OPS_PER_BG_TASK);
+               dsw_port_flush_out_buffers(dsw, port);
                return 0;
        }