linux-kernel - Re: [PATCHv4] fat: don't use custom hex_to

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Message-ID: <871uuz87lc.fsf@devron.myhome.or.jp>
Date:	Fri, 30 Sep 2011 04:35:43 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Joe Perches <joe@...ches.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4] fat: don't use custom hex_to_bin()

Joe Perches <joe@...ches.com> writes:

>> > perhaps:
>> >
>> > 	__le16	foo;
>> >
>> > 	if (hex2bin((u8 *)&foo, ip + 1, 2) < 0)
>> > 		return -EINVAL;
>> > 	*(u16 *)op = le16_to_cpu(foo);
>> >
>> > 	op += 2;
>> 
>> I also thought about it. But I think it is not so good, like you had
>> mistake.  It should actually be "__be16 foo" and "be16_to_cpu()".
>> 
>> If we used sscanf() instead of hex2bin(), I might agree to use
>> "le16_to_cpu()" though.
>> 
>> Thanks.
>
> Funny.
>
> I guess that's what I get for reading Andy's comment
> and coding that readably.
>
> +                                       /* The ip contains 2 bytes in little
> +                                        * endian format. We need to get them
> +                                        * in native endian. */

In here, simply comment is wrong.

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