linux-kernel - Re: [PATCH v2 07/12] pm: at91: the standby mode uses the same sram function as the suspend to memory mode

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 for Android: free password hash cracker in your pocket

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

Date:	Mon, 26 Jan 2015 11:09:55 +0100
From:	Sylvain Rochet <sylvain.rochet@...secur.com>
To:	Wenyou Yang <wenyou.yang@...el.com>
Cc:	nicolas.ferre@...el.com, linux@....linux.org.uk,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	alexandre.belloni@...e-electrons.com, peda@...ntia.se
Subject: Re: [PATCH v2 07/12] pm: at91: the standby mode uses the same sram
 function as the suspend to memory mode

Hello Wenyou,


On Mon, Jan 26, 2015 at 05:42:11PM +0800, Wenyou Yang wrote:
> +static int at91_pm_verify_clocks(suspend_state_t state)
>  {
>  	unsigned long scsr;
>  	int i;
>  
> +	/* For PM_SUSPEND_STANDBY, skip verifying the clock */
> +	if (state == PM_SUSPEND_STANDBY)
> +		return 1;
> +

In my opinion we should use the select() already in place in 
at91_pm_enter() to do that:

>  static int at91_pm_enter(suspend_state_t state)
>  {
>  	at91_pinctrl_gpio_suspend();
>  
>  	switch (state) {
     (...)
> +	case PM_SUSPEND_MEM:

	/*
	 * Ensure that clocks are in a valid state.
	 */
	if (!at91_pm_verify_clocks())
		goto error;
	/* FALLTHROUGH */

> +	case PM_SUSPEND_STANDBY:
>  		/*
> -		 * Suspend-to-RAM is like STANDBY plus slow clock mode, so


Sylvain
--
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/