[dpdk-dev] [PATCH v2] net/mlx5: fix link status initialization

[Shahaf Shuler <shahafs@mellanox.com>]

Following commit 7ba5320baa32 ("net/mlx5: fix link status behavior")
The initial link status is no longer set as part of the port start.

When LSC interrupts are enabled, ethdev layer reads the link status
directly from the device data instead of using the PMD callback.
This may cause application to query the link as down while in fact it was
already up before the DPDK application start (and no interrupt to fix
it).

Fixes: 7ba5320baa32 ("net/mlx5: fix link status behavior")
Cc: nelio.laranjeiro@6wind.com

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
---

On v2:
 - Reworded commit log.
 - Cleared the wait_to_complete on the link update call.

---
 drivers/net/mlx5/mlx5.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index cfab558979..3d222df707 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -991,6 +991,12 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 		DRV_LOG(DEBUG, "port %u forcing Ethernet interface up",
 			eth_dev->data->port_id);
 		mlx5_set_link_up(eth_dev);
+		/*
+		 * Even though the interrupt handler is not installed yet,
+		 * interrupts will still trigger on the asyn_fd from
+		 * Verbs context returned by ibv_open_device().
+		 */
+		mlx5_link_update(eth_dev, 0);
 		/* Store device configuration on private structure. */
 		priv->config = config;
 		continue;
-- 
2.12.0