netdev - Re: [PATCH net-next v2] netdevsim: correctly check return value of debugfs_create

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Date:   Tue, 19 Dec 2017 18:34:37 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>
Cc:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2] netdevsim: correctly check return value of
 debugfs_create_dir

On Wed, 20 Dec 2017 11:27:15 +0900, Prashant Bhole wrote:
> diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
> index eb8c679fca9f..c2a02d1944b8 100644
> --- a/drivers/net/netdevsim/netdev.c
> +++ b/drivers/net/netdevsim/netdev.c
> @@ -147,10 +147,12 @@ struct device_type nsim_dev_type = {
>  static int nsim_init(struct net_device *dev)
>  {
>  	struct netdevsim *ns = netdev_priv(dev);
> -	int err;
> +	int err = -ENOMEM;
>  
>  	ns->netdev = dev;
>  	ns->ddir = debugfs_create_dir(netdev_name(dev), nsim_ddir);
> +	if (IS_ERR_OR_NULL(ns->ddir))
> +		goto err;

nit:
Could you return err; here directly instead of go(ing )to return
and having label and variable of the same name?  Same in
nsim_module_init().

With that feel free to add:

Acked-by: Jakub Kicinski <jakub.kicinski@...ronome.com>

Thanks!

>  	err = nsim_bpf_init(ns);
>  	if (err)
> @@ -171,6 +173,7 @@ static int nsim_init(struct net_device *dev)
>  	nsim_bpf_uninit(ns);
>  err_debugfs_destroy:
>  	debugfs_remove_recursive(ns->ddir);
> +err:
>  	return err;
>  }
>