linux-kernel - Re: [PATCH] fbcon: Replace printk() with pr

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Date:   Sun, 1 Nov 2020 16:41:13 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Peilin Ye <yepeilin.cs@...il.com>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fbcon: Replace printk() with pr_*()

On Sun, Nov 01, 2020 at 09:49:04AM -0500, Peilin Ye wrote:
> Replace printk() with pr_err(), pr_warn() and pr_info(). Do not split long
> strings, for easier grepping. Use `__func__` whenever applicable.
> 
> fbcon_prepare_logo() has more than one callers, use "fbcon_prepare_logo:"
> instead of "fbcon_init:", for less confusion.
> 
> Suggested-by: Sam Ravnborg <sam@...nborg.org>
> Signed-off-by: Peilin Ye <yepeilin.cs@...il.com>
> ---
>  drivers/video/fbdev/core/fbcon.c | 42 +++++++++++++-------------------
>  1 file changed, 17 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index cef437817b0d..a3e87ab0e523 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -659,8 +659,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
>  
>  	if (logo_lines > vc->vc_bottom) {
>  		logo_shown = FBCON_LOGO_CANSHOW;
> -		printk(KERN_INFO
> -		       "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
> +		pr_info("%s: disable boot-logo (boot-logo bigger than screen).\n", __func__);

Shouldn't this be:
		dev_info(info->dev, "...");
instead?

It's a driver, and you have access to the struct device that is being
worked on, so always try to use the dev_* versions of these calls
instead when ever possible.

thanks,

greg k-h