[dpdk-dev] [PATCH 5/9] net/hns3: fix residual flow directory rules when app restart

["Wei Hu (Xavier)" <huwei013@chinasoftinc.com>]

From: Chengwen Feng <fengchengwen@huawei.com>

This patch fixes that the flow directory rules are not cleared during
initialization, which lead to remaining flow directory rules after upper
application(such as testpmd) restarted.

Fixes: fcba820d9b9e ("net/hns3: support flow director")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_fdir.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/hns3/hns3_fdir.c b/drivers/net/hns3/hns3_fdir.c
index ca3c78e1c..53c6448cd 100644
--- a/drivers/net/hns3/hns3_fdir.c
+++ b/drivers/net/hns3/hns3_fdir.c
@@ -772,6 +772,20 @@ static int hns3_config_action(struct hns3_hw *hw, struct hns3_fdir_rule *rule)
 	return hns3_fd_ad_config(hw, ad_data.ad_id, &ad_data);
 }
 
+static int hns3_fd_clear_all_rules(struct hns3_hw *hw, uint32_t rule_num)
+{
+	uint32_t i;
+	int ret;
+
+	for (i = 0; i < rule_num; i++) {
+		ret = hns3_fd_tcam_config(hw, true, i, NULL, false);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 int hns3_fdir_filter_init(struct hns3_adapter *hns)
 {
 	struct hns3_pf *pf = &hns->pf;
@@ -785,6 +799,13 @@ int hns3_fdir_filter_init(struct hns3_adapter *hns)
 		.hash_func = rte_hash_crc,
 		.hash_func_init_val = 0,
 	};
+	int ret;
+
+	ret = hns3_fd_clear_all_rules(&hns->hw, rule_num);
+	if (ret) {
+		PMD_INIT_LOG(ERR, "Clear all fd rules fail! ret = %d", ret);
+		return ret;
+	}
 
 	fdir_hash_params.socket_id = rte_socket_id();
 	TAILQ_INIT(&fdir_info->fdir_list);
-- 
2.23.0