linux-kernel - Re: [PATCH] MFD Fix debugfs code in AB3100 OTP driver

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Date:	Mon, 18 Jan 2010 13:55:31 +0100
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Linus Walleij <linus.walleij@...ricsson.com>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Egger <siccegge@...d.informatik.uni-erlangen.de>,
	"Robert P. J. Day" <rpjday@...shcourse.ca>
Subject: Re: [PATCH] MFD Fix debugfs code in AB3100 OTP driver

Hi Linus,

On Sun, Jan 17, 2010 at 08:57:43PM +0100, Linus Walleij wrote:
> This fixes the aged and unreachable debugfs code in the AB3100
> OTP driver so that it's (A) reachable and (B) works. Bug detected
> in parallell by Christoph Egger using VAMOS and Robert P. J. Day
> by his kernel scanning script.
Patch applied, thanks for taking care of this.

Cheers,
Samuel.


> Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
> Cc: Christoph Egger <siccegge@...d.informatik.uni-erlangen.de>
> Cc: Robert P. J. Day <rpjday@...shcourse.ca>
> ---
>  drivers/mfd/ab3100-otp.c |   13 +++++++------
>  1 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mfd/ab3100-otp.c b/drivers/mfd/ab3100-otp.c
> index 0499b20..b603469 100644
> --- a/drivers/mfd/ab3100-otp.c
> +++ b/drivers/mfd/ab3100-otp.c
> @@ -13,6 +13,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/mfd/ab3100.h>
>  #include <linux/debugfs.h>
> +#include <linux/seq_file.h>
>  
>  /* The OTP registers */
>  #define AB3100_OTP0		0xb0
> @@ -95,11 +96,10 @@ static int __init ab3100_otp_read(struct ab3100_otp *otp)
>   * This is a simple debugfs human-readable file that dumps out
>   * the contents of the OTP.
>   */
> -#ifdef CONFIG_DEBUGFS
> -static int show_otp(struct seq_file *s, void *v)
> +#ifdef CONFIG_DEBUG_FS
> +static int ab3100_show_otp(struct seq_file *s, void *v)
>  {
>  	struct ab3100_otp *otp = s->private;
> -	int err;
>  
>  	seq_printf(s, "OTP is %s\n", otp->locked ? "LOCKED" : "UNLOCKED");
>  	seq_printf(s, "OTP clock switch startup is %uHz\n", otp->freq);
> @@ -113,7 +113,7 @@ static int show_otp(struct seq_file *s, void *v)
>  
>  static int ab3100_otp_open(struct inode *inode, struct file *file)
>  {
> -	return single_open(file, ab3100_otp_show, inode->i_private);
> +	return single_open(file, ab3100_show_otp, inode->i_private);
>  }
>  
>  static const struct file_operations ab3100_otp_operations = {
> @@ -131,13 +131,14 @@ static int __init ab3100_otp_init_debugfs(struct device *dev,
>  					   &ab3100_otp_operations);
>  	if (!otp->debugfs) {
>  		dev_err(dev, "AB3100 debugfs OTP file registration failed!\n");
> -		return err;
> +		return -ENOENT;
>  	}
> +	return 0;
>  }
>  
>  static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
>  {
> -	debugfs_remove_file(otp->debugfs);
> +	debugfs_remove(otp->debugfs);
>  }
>  #else
>  /* Compile this out if debugfs not selected */
> -- 
> 1.6.3.3
> 

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