linux-kernel - Re: [PATCH] watchdog: iTCO_wdt: Fix detection of SMI-off case

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Message-ID: <904ea225-e7de-a11a-419a-0c7ac05e9b6e@roeck-us.net>
Date:   Mon, 30 Aug 2021 13:00:22 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Jan Kiszka <jan.kiszka@...mens.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc:     linux-watchdog@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Christian Storm <christian.storm@...mens.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Mantas Mikulėnas <grawity@...il.com>
Subject: Re: [PATCH] watchdog: iTCO_wdt: Fix detection of SMI-off case

On 8/30/21 12:47 PM, Jan Kiszka wrote:
> On 20.08.21 15:45, Jan Kiszka wrote:
>> On 26.07.21 13:46, Jan Kiszka wrote:
>>> From: Jan Kiszka <jan.kiszka@...mens.com>
>>>
>>> Obviously, the test needs to run against the register content, not its
>>> address.
>>>
>>> Fixes: cb011044e34c ("watchdog: iTCO_wdt: Account for rebooting on second timeout")
>>> Reported-by: Mantas Mikulėnas <grawity@...il.com>
>>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
>>> ---
>>>   drivers/watchdog/iTCO_wdt.c | 2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
>>> index b3f604669e2c..643c6c2d0b72 100644
>>> --- a/drivers/watchdog/iTCO_wdt.c
>>> +++ b/drivers/watchdog/iTCO_wdt.c
>>> @@ -362,7 +362,7 @@ static int iTCO_wdt_set_timeout(struct watchdog_device *wd_dev, unsigned int t)
>>>   	 * Otherwise, the BIOS generally reboots when the SMI triggers.
>>>   	 */
>>>   	if (p->smi_res &&
>>> -	    (SMI_EN(p) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
>>> +	    (inl(SMI_EN(p)) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
>>>   		tmrval /= 2;
>>>   
>>>   	/* from the specs: */
>>>
>>
>> Ping, this is still missing in master. Stable kernels had the revert,
>> but 5.14 will need this.
>>
> 
> Second reminder: 5.14 is out and now broken. Is the patch queued
> somewhere? I do not see it in the watchdog staging branch.
> 

I had it in my own watchdog-next branch for about a month.
Usually Wim picks it up from there or from the mainling list;
he handles all upstreaming. Wim ?

Guenter