linux-kernel - Re: [WATCHDOG] v2.6.26-rc3 patches

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080525110812.3a05e9fa@core>
Date:	Sun, 25 May 2008 11:08:12 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Wim Van Sebroeck <wim@...ana.be>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Samuel Tardieu <sam@...1149.net>,
	Mike Frysinger <vapier.adi@...il.com>,
	Mingarelli@...omag.iguana.be, Thomas <Thomas.Mingarelli@...com>,
	Jordan Crouse <jordan.crouse@....com>,
	Chen Gong <g.chen@...escale.com>,
	Gabriel C <nix.or.die@...glemail.com>
Subject: Re: [WATCHDOG] v2.6.26-rc3 patches

> +
> +static void geodewdt_ping(void)
> +{
> +	/* Stop the counter */
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
> +
> +	/* Reset the counter */
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
> +
> +	/* Enable the counter */
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN);
> +}
> +
> +static void geodewdt_disable(void)
> +{
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
> +}
> +
> +static int geodewdt_set_heartbeat(int val)
> +{
> +	if (val < 1 || val > GEODEWDT_MAX_SECONDS)
> +		return -EINVAL;
> +
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_CMP2, val * GEODEWDT_HZ);
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
> +	geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN);
> +
> +	timeout = val;
> +	return 0;
> +}
> +

There is no locking in geodewdt - so all those routines can end up being
run together. Not sure it is a problem just noting it while reviewing.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/