From: Achiad Shochat Date: Tue, 3 Nov 2015 06:07:18 +0000 (+0200) Subject: net/mlx5e: Avoid NULL pointer access in case of configuration failure X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=a1985740904342a884471348f6e038ee5d706c36;p=deliverable%2Flinux.git net/mlx5e: Avoid NULL pointer access in case of configuration failure In case a configuration operation that involves closing and re-opening resources (e.g RX/TX queue size change) fails at the re-opening stage these resources will remain closed. So when executing (following) configuration operations (e.g ifconfig down) we cannot assume that these resources are available. Signed-off-by: Achiad Shochat Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index bb801a9bbd42..9df6f9ae9bb5 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -1404,6 +1404,12 @@ int mlx5e_close_locked(struct net_device *netdev) { struct mlx5e_priv *priv = netdev_priv(netdev); + /* May already be CLOSED in case a previous configuration operation + * (e.g RX/TX queue size change) that involves close&open failed. + */ + if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) + return 0; + clear_bit(MLX5E_STATE_OPENED, &priv->state); mlx5e_redirect_rqts(priv);