[PATCH] net/mlx5: fix verification of device context

Get interface name function lacks verification of device context.
It might lead to segmentation fault when trying to query the name
after the device is closed.fixing it by adding the missing verification

Fixes: cd89f22a1e9770 ("net/mlx5: remove unused interface name query")
Cc: stable@dpdk.org

Signed-off-by: Shachar Beiser <redacted>
---
 drivers/net/mlx5/mlx5_ethdev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index b70b7b9..6e67461 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c

@@ -173,6 +173,10 @@ struct priv *
 	char match[IF_NAMESIZE] = "";
 
 	{
+		if (priv->ctx == NULL) {
+			DEBUG("The device is closed, cannot query interface name ");
+			return -1;
+		}
 		MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
 
 		dir = opendir(path);

-- 
1.8.3.1