linux-kernel - Re: [PATCH v3 2/2] Use common localtime/gmtime in fat_time

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Message-ID: <87k51xmi5y.fsf@devron.myhome.or.jp>
Date:	Sat, 25 Jul 2009 14:43:37 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Zhaolei <zhaolei@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>, mingo@...e.hu, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] Use common localtime/gmtime in fat_time_unix2fat()

Zhaolei <zhaolei@...fujitsu.com> writes:

> +	if (sbi->options.tz_utc) {
> +		gmtime_r(ts->tv_sec, &tm);
> +	} else {
> +		localtime_r(ts->tv_sec, &tm);
> +	}

Missing error check.

> -	/* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
> -	if (second < UNIX_SECS_1980) {
> +	/*  FAT can only support year between 1980 to 2107 */
> +	if (tm.tm_year < 1980 - 1900) {
>  		*time = 0;
>  		*date = cpu_to_le16((0 << 9) | (1 << 5) | 1);
>  		if (time_cs)
>  			*time_cs = 0;
>  		return;
>  	}
> -#if BITS_PER_LONG == 64
> -	if (second >= UNIX_SECS_2108) {
> +	if (tm.tm_year > 2107 - 1900) {
>  		*time = cpu_to_le16((23 << 11) | (59 << 5) | 29);
>  		*date = cpu_to_le16((127 << 9) | (12 << 5) | 31);
>  		if (time_cs)
>  			*time_cs = 199;
>  		return;
>  	}
> -#endif

I think tm.tm_year is undefine in case of the error.

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