linux-kernel - Re: [PATCH v1 4/5] mtd: core: Drop duplicate NULL checks around nvmem

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Message-ID: <20220110091157.6396569e@xps13>
Date:   Mon, 10 Jan 2022 09:11:57 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>
Subject: Re: [PATCH v1 4/5] mtd: core: Drop duplicate NULL checks around
 nvmem_unregister()

Hi Andy,

andriy.shevchenko@...ux.intel.com wrote on Tue,  4 Jan 2022 15:38:42
+0200:

> Since nvmem_unregister() checks for NULL, no need to repeat in
> the caller. Drop duplicate NULL checks.

Acked-by: Miquel Raynal <miquel.raynal@...tlin.com>

> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/mtd/mtdcore.c | 13 ++++---------
>  1 file changed, 4 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index 70f492dce158..010ffc34532a 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -742,8 +742,7 @@ int del_mtd_device(struct mtd_info *mtd)
>  		debugfs_remove_recursive(mtd->dbg.dfs_dir);
>  
>  		/* Try to remove the NVMEM provider */
> -		if (mtd->nvmem)
> -			nvmem_unregister(mtd->nvmem);
> +		nvmem_unregister(mtd->nvmem);
>  
>  		device_unregister(&mtd->dev);
>  
> @@ -921,8 +920,7 @@ static int mtd_otp_nvmem_add(struct mtd_info *mtd)
>  	return 0;
>  
>  err:
> -	if (mtd->otp_user_nvmem)
> -		nvmem_unregister(mtd->otp_user_nvmem);
> +	nvmem_unregister(mtd->otp_user_nvmem);
>  	return err;
>  }
>  
> @@ -1026,11 +1024,8 @@ int mtd_device_unregister(struct mtd_info *master)
>  		memset(&master->reboot_notifier, 0, sizeof(master->reboot_notifier));
>  	}
>  
> -	if (master->otp_user_nvmem)
> -		nvmem_unregister(master->otp_user_nvmem);
> -
> -	if (master->otp_factory_nvmem)
> -		nvmem_unregister(master->otp_factory_nvmem);
> +	nvmem_unregister(master->otp_user_nvmem);
> +	nvmem_unregister(master->otp_factory_nvmem);
>  
>  	err = del_mtd_partitions(master);
>  	if (err)


Thanks,
Miquèl