linux-kernel - Re: [PATCH 2/3] debugfs: move to new strtobool

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Message-ID: <4DADF0D3.3040006@bluewatersys.com>
Date:	Wed, 20 Apr 2011 08:30:11 +1200
From:	Ryan Mallon <ryan@...ewatersys.com>
To:	Jonathan Cameron <jic23@....ac.uk>
CC:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	greg@...ah.com, adobriyan@...il.com
Subject: Re: [PATCH 2/3] debugfs: move to new strtobool

On 04/19/2011 11:43 PM, Jonathan Cameron wrote:
> No functional changes requires that we eat errors from strtobool.
> If people want to not do this, then it should be fixed at a later date.

May as well fix it now or it will get forgotten about. A second patch on
top of this can fix the bug.

~Ryan

> V2: Simplification suggested by Rusty Russell removes the need for
> additional variable ret.
> 
> Signed-off-by: Jonathan Cameron <jic23@....ac.uk>
> ---
>  fs/debugfs/file.c |   17 ++++-------------
>  1 files changed, 4 insertions(+), 13 deletions(-)
> 
> diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
> index 89d394d..568304d 100644
> --- a/fs/debugfs/file.c
> +++ b/fs/debugfs/file.c
> @@ -429,25 +429,16 @@ static ssize_t write_file_bool(struct file *file, const char __user *user_buf,
>  {
>  	char buf[32];
>  	int buf_size;
> +	bool bv;
>  	u32 *val = file->private_data;
>  
>  	buf_size = min(count, (sizeof(buf)-1));
>  	if (copy_from_user(buf, user_buf, buf_size))
>  		return -EFAULT;
>  
> -	switch (buf[0]) {
> -	case 'y':
> -	case 'Y':
> -	case '1':
> -		*val = 1;
> -		break;
> -	case 'n':
> -	case 'N':
> -	case '0':
> -		*val = 0;
> -		break;
> -	}
> -	
> +	if (strtobool(buf, &bv) == 0)
> +		*val = bv;
> +
>  	return count;
>  }
>  


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