[PATCH] graph: fix head move when graph walk in mcore dispatch

[Jingjing Wu]

Head move should happen after the core id check, otherwise
source node will be missed.

Fixes: 35dfd9b9fd85 ("graph: introduce graph walk by cross-core dispatch")
Cc: stable at dpdk.org

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
 lib/graph/rte_graph_model_mcore_dispatch.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/graph/rte_graph_model_mcore_dispatch.h b/lib/graph/rte_graph_model_mcore_dispatch.h
index 75ec388cad..b96469296e 100644
--- a/lib/graph/rte_graph_model_mcore_dispatch.h
+++ b/lib/graph/rte_graph_model_mcore_dispatch.h
@@ -97,12 +97,12 @@ rte_graph_walk_mcore_dispatch(struct rte_graph *graph)
 		__rte_graph_mcore_dispatch_sched_wq_process(graph);
 
 	while (likely(head != graph->tail)) {
-		node = (struct rte_node *)RTE_PTR_ADD(graph, cir_start[(int32_t)head++]);
+		node = (struct rte_node *)RTE_PTR_ADD(graph, cir_start[(int32_t)head]);
 
 		/* skip the src nodes which not bind with current worker */
 		if ((int32_t)head < 0 && node->dispatch.lcore_id != graph->dispatch.lcore_id)
 			continue;
-
+		head++;
 		/* Schedule the node until all task/objs are done */
 		if (node->dispatch.lcore_id != RTE_MAX_LCORE &&
 		    graph->dispatch.lcore_id != node->dispatch.lcore_id &&
-- 
2.34.1