[dpdk-dev] [PATCH] net/i40e: fix port segmentation fault when restart

[Wei Zhao <wei.zhao1@intel.com>]

It will clear all queue region related configuration
when dev stop even if threr is no queue region config,
so this may cause error. So add check when flush queue
region config and delete it when device stop.

Fixes: 7cbecc2f742 ("net/i40e: support queue region set and flush")

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c  |  3 ---
 drivers/net/i40e/rte_pmd_i40e.c | 27 ++++++++++++++-------------
 2 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 811cc9f..7a1290b 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2154,9 +2154,6 @@ i40e_dev_stop(struct rte_eth_dev *dev)
 	/* reset hierarchy commit */
 	pf->tm_conf.committed = false;
 
-	/* Remove all the queue region configuration */
-	i40e_flush_queue_region_all_conf(dev, hw, pf, 0);
-
 	hw->adapter_stopped = 1;
 }
 
diff --git a/drivers/net/i40e/rte_pmd_i40e.c b/drivers/net/i40e/rte_pmd_i40e.c
index aeb92af..8f94faa 100644
--- a/drivers/net/i40e/rte_pmd_i40e.c
+++ b/drivers/net/i40e/rte_pmd_i40e.c
@@ -2845,22 +2845,23 @@ i40e_flush_queue_region_all_conf(struct rte_eth_dev *dev,
 		return 0;
 	}
 
-	info->queue_region_number = 1;
-	info->region[0].queue_num = main_vsi->nb_used_qps;
-	info->region[0].queue_start_index = 0;
+	if (info->queue_region_number) {
+		info->queue_region_number = 1;
+		info->region[0].queue_num = main_vsi->nb_used_qps;
+		info->region[0].queue_start_index = 0;
 
-	ret = i40e_vsi_update_queue_region_mapping(hw, pf);
-	if (ret != I40E_SUCCESS)
-		PMD_DRV_LOG(INFO, "Failed to flush queue region mapping.");
-
-	ret = i40e_dcb_init_configure(dev, TRUE);
-	if (ret != I40E_SUCCESS) {
-		PMD_DRV_LOG(INFO, "Failed to flush dcb.");
-		pf->flags &= ~I40E_FLAG_DCB;
-	}
+		ret = i40e_vsi_update_queue_region_mapping(hw, pf);
+			if (ret != I40E_SUCCESS)
+			PMD_DRV_LOG(INFO, "Failed to flush queue region mapping.");
 
-	i40e_init_queue_region_conf(dev);
+		ret = i40e_dcb_init_configure(dev, TRUE);
+		if (ret != I40E_SUCCESS) {
+			PMD_DRV_LOG(INFO, "Failed to flush dcb.");
+			pf->flags &= ~I40E_FLAG_DCB;
+		}
 
+		i40e_init_queue_region_conf(dev);
+	}
 	return 0;
 }
 
-- 
2.7.4