linux-kernel - Re: [PATCH v2] media: aspeed: Fix return value check in aspeed_video_debugfs

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Date:   Sat, 26 Nov 2022 18:25:07 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>
Cc:     eajames@...ux.ibm.com, mchehab@...nel.org,
        linux-media@...r.kernel.org, openbmc@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        joel@....id.au, andrew@...id.au
Subject: Re: [PATCH v2] media: aspeed: Fix return value check in
 aspeed_video_debugfs_create()

On Sat, Nov 26, 2022 at 02:28:13AM +0000, Zheng Yongjun wrote:
> In case of error, the function debugfs_create_file() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check
> should be replaced with IS_ERR().
> 
> Fixes: 52fed10ad756 ("media: aspeed: add debugfs")
> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>

Please see:

https://patchwork.kernel.org/project/linux-wireless/patch/20200429101526.GA2094124@kroah.com/

and there are other examples. Just delete all the checks.

	Andrew