linux-kernel - Re: [PATCH] wireless: remove unnecessary condition check before kfree

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Message-ID: <1536563406.3224.2.camel@sipsolutions.net>
Date:   Mon, 10 Sep 2018 09:10:06 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     zhong jiang <zhongjiang@...wei.com>, davem@...emloft.net
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wireless: remove unnecessary condition check before
 kfree

On Sat, 2018-09-08 at 22:12 +0800, zhong jiang wrote:
> kfree has taken the null pointer into account. Just remove the
> redundant condition check before kfree.

I'm all for doing that if it actually removes conditionals, but

> -	if (!IS_ERR_OR_NULL(regdb))
> +	if (!IS_ERR(regdb))
>  		kfree(regdb);

this seems rather pointless since there's still a condition. In that
case, I feel it's easier to understand the original code.

johannes