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From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Seunghun Lee <waydi1@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] fat: Simplify calc_fat_clusters code
Date: Wed, 03 Sep 2014 00:37:29 +0900	[thread overview]
Message-ID: <87k35m3ufa.fsf@devron.myhome.or.jp> (raw)
In-Reply-To: <1409664810-31960-1-git-send-email-waydi1@gmail.com> (Seunghun Lee's message of "Tue, 2 Sep 2014 22:33:30 +0900")

Seunghun Lee <waydi1@gmail.com> writes:

> diff --git a/fs/fat/inode.c b/fs/fat/inode.c
> index 756aead..6992dea 100644
> --- a/fs/fat/inode.c
> +++ b/fs/fat/inode.c
> @@ -1307,12 +1307,9 @@ static unsigned long calc_fat_clusters(struct super_block *sb)
>  	struct msdos_sb_info *sbi = MSDOS_SB(sb);
>  
>  	/* Divide first to avoid overflow */
> -	if (sbi->fat_bits != 12) {
> -		unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits;
> -		return ent_per_sec * sbi->fat_length;
> -	}
> +	unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits;
>  
> -	return sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits;
> +	return ent_per_sec * sbi->fat_length;
>  }

When sbi->fat_bits == 12, it doesn't work, right? (there is the remainder)

Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

  reply	other threads:[~2014-09-02 16:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-02 13:33 [PATCH] fat: Simplify calc_fat_clusters code Seunghun Lee
2014-09-02 15:37 ` OGAWA Hirofumi [this message]
2014-09-02 16:41   ` Seunghun Lee

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