Subject: Re: [PATCH net-next 2/3] net: rmnet: print error message when command fails

From: [email-masked]
Date: Wed, 04 Mar 2020 13:47:19 -0700

> +	if (rmnet_is_real_dev_registered(slave_dev)) {
> +		NL_SET_ERR_MSG_MOD(extack,
> +				   "dev is already attached another rmnet dev");
> 
Hi Taehee

Can you make this change as well-
"slave cannot be another rmnet dev"