[dpdk-stable] [PATCH] net/bnxt: fix nested lock at bond mode

[dpdk-stable] [PATCH] net/bnxt: fix nested lock at bond mode

[Weifeng Li]

Bnxt regist lsc callback (bond_ethdev_lsc_event_callback) when
working at bond mode. This callback will dead lock when lsc
interrupt triggerred.

lsc interrupt ->
bnxt_handle_async_event ->
bnxt_link_update_op ->
bond_ethdev_lsc_event_callback (lsc_lock) ->
bnxt_link_update_op ->
bond_ethdev_lsc_event_callback (lsc_lock dead lock)

Fixes: c2faa1d1969e ("net/bnxt: add support for LSC interrupt event")
Cc: stable@dpdk.org

Signed-off-by: Weifeng Li <liweifeng96@126.com>
---
 drivers/net/bnxt/bnxt_cpr.c    | 2 ++
 drivers/net/bnxt/bnxt_ethdev.c | 5 -----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 2c7fd78..bf8570f 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -111,6 +111,8 @@ void bnxt_handle_async_event(struct bnxt *bp,
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CFG_CHANGE:
 		/* FALLTHROUGH */
 		bnxt_link_update_op(bp->eth_dev, 0);
+		rte_eth_dev_callback_process(eth_dev,
+			RTE_ETH_EVENT_INTR_LSC, NULL);
 		break;
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD:
 		PMD_DRV_LOG(INFO, "Async event: PF driver unloaded\n");
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 495c6cd..619b7b8 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1844,11 +1844,6 @@ int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete)
 	if (new.link_status != eth_dev->data->dev_link.link_status ||
 	    new.link_speed != eth_dev->data->dev_link.link_speed) {
 		rte_eth_linkstatus_set(eth_dev, &new);
-
-		rte_eth_dev_callback_process(eth_dev,
-					     RTE_ETH_EVENT_INTR_LSC,
-					     NULL);
-
 		bnxt_print_link_info(eth_dev);
 	}
 
-- 
1.8.3.1

[dpdk-stable] [PATCH] net/bnxt: fix nested lock at bond mode

[Weifeng Li]

Bnxt regist lsc callback (bond_ethdev_lsc_event_callback) when
working at bond mode. This callback will dead lock when lsc
interrupt triggerred.

lsc interrupt ->
bnxt_handle_async_event ->
bnxt_link_update_op ->
bond_ethdev_lsc_event_callback (lsc_lock) ->
bnxt_link_update_op ->
bond_ethdev_lsc_event_callback (lsc_lock dead lock)

Fixes: c2faa1d1969e ("net/bnxt: add support for LSC interrupt event")
Cc: stable@dpdk.org

Signed-off-by: Weifeng Li <liweifeng96@126.com>
---
 drivers/net/bnxt/bnxt_cpr.c    | 2 ++
 drivers/net/bnxt/bnxt_ethdev.c | 5 -----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 2c7fd78..f4c9c72 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -111,6 +111,8 @@ void bnxt_handle_async_event(struct bnxt *bp,
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CFG_CHANGE:
 		/* FALLTHROUGH */
 		bnxt_link_update_op(bp->eth_dev, 0);
+		rte_eth_dev_callback_process(bp->eth_dev,
+			RTE_ETH_EVENT_INTR_LSC, NULL);
 		break;
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD:
 		PMD_DRV_LOG(INFO, "Async event: PF driver unloaded\n");
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 495c6cd..619b7b8 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1844,11 +1844,6 @@ int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete)
 	if (new.link_status != eth_dev->data->dev_link.link_status ||
 	    new.link_speed != eth_dev->data->dev_link.link_speed) {
 		rte_eth_linkstatus_set(eth_dev, &new);
-
-		rte_eth_dev_callback_process(eth_dev,
-					     RTE_ETH_EVENT_INTR_LSC,
-					     NULL);
-
 		bnxt_print_link_info(eth_dev);
 	}
 
-- 
1.8.3.1