[PATCH v4 3/7] net/bnxt: fix race-condition when report error recovery

[Chengwen Feng <fengchengwen@huawei.com>]

If set data path functions to dummy functions before reports error
recovering event, there maybe a race-condition with data path threads,
this patch fixes it by setting data path functions to dummy functions
only after reports such event.

Fixes: e11052f3a46f ("net/bnxt: support proactive error handling mode")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@huawei.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_cpr.c    | 13 +++++++------
 drivers/net/bnxt/bnxt_ethdev.c |  4 ++--
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index a4509abd60..1da0fc62f4 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -189,14 +189,9 @@ void bnxt_handle_async_event(struct bnxt *bp,
 		PMD_DRV_LOG(INFO, "Port conn async event\n");
 		break;
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_RESET_NOTIFY:
-		/*
-		 * Avoid any rx/tx packet processing during firmware reset
-		 * operation.
-		 */
-		bnxt_stop_rxtx(bp->eth_dev);
-
 		/* Ignore reset notify async events when stopping the port */
 		if (!bp->eth_dev->data->dev_started) {
+			bnxt_stop_rxtx(bp->eth_dev);
 			bp->flags |= BNXT_FLAG_FATAL_ERROR;
 			return;
 		}
@@ -205,6 +200,12 @@ void bnxt_handle_async_event(struct bnxt *bp,
 					     RTE_ETH_EVENT_ERR_RECOVERING,
 					     NULL);
 
+		/*
+		 * Avoid any rx/tx packet processing during firmware reset
+		 * operation.
+		 */
+		bnxt_stop_rxtx(bp->eth_dev);
+
 		pthread_mutex_lock(&bp->err_recovery_lock);
 		event_data = data1;
 		/* timestamp_lo/hi values are in units of 100ms */
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index e63febe782..2813ce5035 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -4738,14 +4738,14 @@ static void bnxt_check_fw_health(void *arg)
 	bp->flags |= BNXT_FLAG_FATAL_ERROR;
 	bp->flags |= BNXT_FLAG_FW_RESET;
 
-	bnxt_stop_rxtx(bp->eth_dev);
-
 	PMD_DRV_LOG(ERR, "Detected FW dead condition\n");
 
 	rte_eth_dev_callback_process(bp->eth_dev,
 				     RTE_ETH_EVENT_ERR_RECOVERING,
 				     NULL);
 
+	bnxt_stop_rxtx(bp->eth_dev);
+
 	if (bnxt_is_primary_func(bp))
 		wait_msec = info->primary_func_wait_period;
 	else
-- 
2.17.1