linux-kernel - Re: [PATCH 08/42] drivers/fsi: Convert snprintf to sysfs

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Date: Wed, 17 Jan 2024 08:19:21 -0600
From: Eddie James <eajames@...ux.ibm.com>
To: Li Zhijian <lizhijian@...itsu.com>, linux-kernel@...r.kernel.org
Cc: Jeremy Kerr <jk@...abs.org>, Joel Stanley <joel@....id.au>,
        Alistar Popple <alistair@...ple.id.au>, linux-fsi@...ts.ozlabs.org
Subject: Re: [PATCH 08/42] drivers/fsi: Convert snprintf to sysfs_emit


On 1/15/24 22:51, Li Zhijian wrote:
> Per filesystems/sysfs.rst, show() should only use sysfs_emit()
> or sysfs_emit_at() when formatting the value to be returned to user space.
>
> coccinelle complains that there are still a couple of functions that use
> snprintf(). Convert them to sysfs_emit().
>
>> ./drivers/fsi/fsi-master-ast-cf.c:1086:8-16: WARNING: please use sysfs_emit
>> ./drivers/fsi/fsi-master-gpio.c:721:8-16: WARNING: please use sysfs_emit
> No functional change intended


Thanks!


Reviewed-by: Eddie James <eajames@...ux.ibm.com>


>
> CC: Jeremy Kerr <jk@...abs.org>
> CC: Joel Stanley <joel@....id.au>
> CC: Alistar Popple <alistair@...ple.id.au>
> CC: Eddie James <eajames@...ux.ibm.com>
> CC: linux-fsi@...ts.ozlabs.org
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
> ---
>   drivers/fsi/fsi-master-ast-cf.c | 3 +--
>   drivers/fsi/fsi-master-gpio.c   | 3 +--
>   2 files changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c
> index 812dfa9a9140..5740b2d9dace 100644
> --- a/drivers/fsi/fsi-master-ast-cf.c
> +++ b/drivers/fsi/fsi-master-ast-cf.c
> @@ -1083,8 +1083,7 @@ static ssize_t external_mode_show(struct device *dev,
>   {
>   	struct fsi_master_acf *master = dev_get_drvdata(dev);
>   
> -	return snprintf(buf, PAGE_SIZE - 1, "%u\n",
> -			master->external_mode ? 1 : 0);
> +	return sysfs_emit(buf, "%u\n", master->external_mode ? 1 : 0);
>   }
>   
>   static ssize_t external_mode_store(struct device *dev,
> diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
> index ed03da4f2447..286fe1cddf99 100644
> --- a/drivers/fsi/fsi-master-gpio.c
> +++ b/drivers/fsi/fsi-master-gpio.c
> @@ -718,8 +718,7 @@ static ssize_t external_mode_show(struct device *dev,
>   {
>   	struct fsi_master_gpio *master = dev_get_drvdata(dev);
>   
> -	return snprintf(buf, PAGE_SIZE - 1, "%u\n",
> -			master->external_mode ? 1 : 0);
> +	return sysfs_emit(buf, "%u\n", master->external_mode ? 1 : 0);
>   }
>   
>   static ssize_t external_mode_store(struct device *dev,