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Date:   Wed, 19 Jan 2022 07:59:27 -0800
From:   Jakub Kicinski <kuba@kernel.org>
To:     cgel.zte@gmail.com
Cc:     chi.minghao@zte.com.cn, davem@davemloft.net, dsahern@gmail.com,
        dsahern@kernel.org, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org, yoshfuji@linux-ipv6.org, zealci@zte.com.cn
Subject: Re: [PATCH] net/ipv6: remove redundant err variable
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On Wed, 19 Jan 2022 05:55:57 +0000 cgel.zte@gmail.com wrote:
> There are more than 3,000 numbers retrieved by the rules I wrote.
> Of course, many of these 3,000 are false positives, and maybe 
> there are 300 patches.I wrote this rule similar to returnvar.cocci.

Can you start by improving returnvar.cocci so it catches all the cases?
Then make sure your patches build and don't introduce formatting
problems. Then post them.