netdev - Re: [PATCH v2,net-next] net/sched: remove return value of unregister_tcf_proto

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Date:   Tue, 12 Jul 2022 18:09:06 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Zhengchao Shao <shaozhengchao@...wei.com>
Cc:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <jhs@...atatu.com>, <xiyou.wangcong@...il.com>, <jiri@...nulli.us>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
        <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>
Subject: Re: [PATCH v2,net-next] net/sched: remove return value of
 unregister_tcf_proto_ops

On Mon, 11 Jul 2022 16:09:10 +0800 Zhengchao Shao wrote:
> Return value of unregister_tcf_proto_ops is unused, remove it.

> -int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
> +void unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
>  {
>  	struct tcf_proto_ops *t;
>  	int rc = -ENOENT;
> @@ -214,7 +214,10 @@ int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
>  		}
>  	}
>  	write_unlock(&cls_mod_lock);
> -	return rc;
> +

> +	if (rc)
> +		pr_warn("unregister tc filter kind(%s) failed\n", ops->kind);

I was saying WARN, by which I meant:

WARN(rc, "unregister tc filter kind(%s) failed %d\n", ops->kind, rc);