linux-kernel - Re: [PATCH 03/10] watchdog: keembay: Update pretimeout to zero in the TH ISR

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: <20210512135845.GC1333995@roeck-us.net>
Date:   Wed, 12 May 2021 06:58:45 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     shruthi.sanil@...el.com
Cc:     wim@...ux-watchdog.org, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org, andriy.shevchenko@...ux.intel.com,
        kris.pan@...ux.intel.com, mgross@...ux.intel.com,
        srikanth.thokala@...el.com, lakshmi.bai.raja.subramanian@...el.com,
        mallikarjunappa.sangannavar@...el.com
Subject: Re: [PATCH 03/10] watchdog: keembay: Update pretimeout to zero in
 the TH ISR

On Wed, May 12, 2021 at 02:17:17PM +0530, shruthi.sanil@...el.com wrote:
> From: Shruthi Sanil <shruthi.sanil@...el.com>
> 
> The pretimeout has to be updated to zero during the ISR of the
> ThresHold interrupt. Else the TH interrupt would be triggerred for
> every tick until the timeout.
> 
> Fixes: fa0f8d51e90d ("watchdog: Add watchdog driver for Intel Keembay Soc")
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Tested-by: Kris Pan <kris.pan@...el.com>
> Signed-off-by: Shruthi Sanil <shruthi.sanil@...el.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/watchdog/keembay_wdt.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/watchdog/keembay_wdt.c b/drivers/watchdog/keembay_wdt.c
> index b2afeb4a60e3..6053416b8d3d 100644
> --- a/drivers/watchdog/keembay_wdt.c
> +++ b/drivers/watchdog/keembay_wdt.c
> @@ -154,6 +154,8 @@ static irqreturn_t keembay_wdt_th_isr(int irq, void *dev_id)
>  	struct keembay_wdt *wdt = dev_id;
>  	struct arm_smccc_res res;
>  
> +	keembay_wdt_set_pretimeout(&wdt->wdd, 0x0);
> +
>  	arm_smccc_smc(WDT_ISR_CLEAR, WDT_ISR_MASK, 0, 0, 0, 0, 0, 0, &res);
>  	dev_crit(wdt->wdd.parent, "Intel Keem Bay non-sec wdt pre-timeout.\n");
>  	watchdog_notify_pretimeout(&wdt->wdd);
> -- 
> 2.17.1
>