linux-kernel - Re: [PATCH] drm/arm/malidp: use sysfs

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Message-ID: <Y9e41kG1tcQX6L10@e110455-lin.cambridge.arm.com>
Date:   Mon, 30 Jan 2023 12:32:22 +0000
From:   Liviu Dudau <liviu.dudau@....com>
To:     Deepak R Varma <drv@...lo.com>
Cc:     Brian Starkey <brian.starkey@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>,
        Saurabh Singh Sengar <ssengar@...rosoft.com>
Subject: Re: [PATCH] drm/arm/malidp: use sysfs_emit in show function callback

On Sat, Jan 28, 2023 at 02:21:26AM +0530, Deepak R Varma wrote:
> According to Documentation/filesystems/sysfs.rst, the show() callback
> function of kobject attributes should strictly use sysfs_emit() instead
> of sprintf() family functions.
> Issue identified using the device_attr_show.cocci Coccinelle script.
> 
> Signed-off-by: Deepak R Varma <drv@...lo.com>

Acked-by: Liviu Dudau <liviu.dudau@....com>

I will push the change into drm-misc-next by the end of the week.

Best regards,
Liviu

> ---
>  drivers/gpu/drm/arm/malidp_drv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> index 589c1c66a6dc..cf040e2e9efe 100644
> --- a/drivers/gpu/drm/arm/malidp_drv.c
> +++ b/drivers/gpu/drm/arm/malidp_drv.c
> @@ -649,7 +649,7 @@ static ssize_t core_id_show(struct device *dev, struct device_attribute *attr,
>  	struct drm_device *drm = dev_get_drvdata(dev);
>  	struct malidp_drm *malidp = drm_to_malidp(drm);
>  
> -	return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id);
> +	return sysfs_emit(buf, "%08x\n", malidp->core_id);
>  }
>  
>  static DEVICE_ATTR_RO(core_id);
> -- 
> 2.34.1
> 
> 
> 

-- 
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