linux-kernel - Re: [PATCH v4 1/2] pinctrl: use to octal permissions for debugfs files

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Date:   Wed, 10 Feb 2021 23:36:39 -0800
From:   Joe Perches <joe@...ches.com>
To:     Drew Fustini <drew@...gleboard.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tony Lindgren <tony@...mide.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Jason Kridner <jkridner@...gleboard.org>,
        Robert Nelson <robertcnelson@...gleboard.org>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v4 1/2] pinctrl: use to octal permissions for debugfs
 files

On Wed, 2021-02-10 at 14:28 -0800, Drew Fustini wrote:
> Switch over pinctrl debugfs files to use octal permissions as they are
> preferred over symbolic permissions. Refer to commit f90774e1fd27
> ("checkpatch: look for symbolic permissions and suggest octal instead").
> 
> Note: S_IFREG flag is added to the mode by __debugfs_create_file()
> in fs/debugfs/inode.c
> 
> Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: Drew Fustini <drew@...gleboard.org>
> ---
>  drivers/pinctrl/core.c    | 6 +++---
>  drivers/pinctrl/pinconf.c | 4 ++--
>  drivers/pinctrl/pinmux.c  | 4 ++--
>  3 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
> index 3663d87f51a0..02f8710afb9c 100644
> --- a/drivers/pinctrl/core.c
> +++ b/drivers/pinctrl/core.c
> @@ -1914,11 +1914,11 @@ static void pinctrl_init_debugfs(void)
>  		return;
>  	}
>  
> 
> -	debugfs_create_file("pinctrl-devices", S_IFREG | S_IRUGO,
> +	debugfs_create_file("pinctrl-devices", 0444,
>  			    debugfs_root, NULL, &pinctrl_devices_fops);
> -	debugfs_create_file("pinctrl-maps", S_IFREG | S_IRUGO,
> +	debugfs_create_file("pinctrl-maps", 0444,
>  			    debugfs_root, NULL, &pinctrl_maps_fops);
> -	debugfs_create_file("pinctrl-handles", S_IFREG | S_IRUGO,
> +	debugfs_create_file("pinctrl-handles", 0444,
>  			    debugfs_root, NULL, &pinctrl_fops);
>  }

Why aren't you also converting this block in the same file?

@@ -1890,11 +1890,11 @@ static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
                        dev_name(pctldev->dev));
                return;
        }
-       debugfs_create_file("pins", S_IFREG | S_IRUGO,
+       debugfs_create_file("pins", S_IFREG | 0444,
                            device_root, pctldev, &pinctrl_pins_fops);
-       debugfs_create_file("pingroups", S_IFREG | S_IRUGO,
+       debugfs_create_file("pingroups", S_IFREG | 0444,
                            device_root, pctldev, &pinctrl_groups_fops);
-       debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO,
+       debugfs_create_file("gpio-ranges", S_IFREG | 0444,
                            device_root, pctldev, &pinctrl_gpioranges_fops);
        if (pctldev->desc->pmxops)
                pinmux_init_device_debugfs(device_root, pctldev);