[dpdk-dev] [PATCH] net/bonding: fix double get slave link status

[Yunjian Wang <wangyunjian@huawei.com>]

When link status polling mode is using, the slave link status is
queried twice, which may be inconsistent. To fix this, we can keep
the lastest queried link state.

Fixes: a45b288ef21a ("bond: support link status polling")
Cc: stable@dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
 drivers/net/bonding/rte_eth_bond_pmd.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 845e8fd0cf..5c4c47251b 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -2390,9 +2390,6 @@ bond_ethdev_slave_link_status_change_monitor(void *cb_arg)
 			 * event callback */
 			if (slave_ethdev->data->dev_link.link_status !=
 					internals->slaves[i].last_link_status) {
-				internals->slaves[i].last_link_status =
-						slave_ethdev->data->dev_link.link_status;
-
 				bond_ethdev_lsc_event_callback(internals->slaves[i].port_id,
 						RTE_ETH_EVENT_INTR_LSC,
 						&bonded_ethdev->data->port_id,
@@ -2891,7 +2888,7 @@ bond_ethdev_lsc_event_callback(uint16_t port_id, enum rte_eth_event_type type,
 
 	uint8_t lsc_flag = 0;
 	int valid_slave = 0;
-	uint16_t active_pos;
+	uint16_t active_pos, slave_idx;
 	uint16_t i;
 
 	if (type != RTE_ETH_EVENT_INTR_LSC || param == NULL)
@@ -2912,6 +2909,7 @@ bond_ethdev_lsc_event_callback(uint16_t port_id, enum rte_eth_event_type type,
 	for (i = 0; i < internals->slave_count; i++) {
 		if (internals->slaves[i].port_id == port_id) {
 			valid_slave = 1;
+			slave_idx = i;
 			break;
 		}
 	}
@@ -3000,6 +2998,7 @@ bond_ethdev_lsc_event_callback(uint16_t port_id, enum rte_eth_event_type type,
 	 * slaves
 	 */
 	bond_ethdev_link_update(bonded_eth_dev, 0);
+	internals->slaves[slave_idx].last_link_status = link.link_status;
 
 	if (lsc_flag) {
 		/* Cancel any possible outstanding interrupts if delays are enabled */
-- 
2.27.0