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

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Message-ID: <20210907201428.GA1109@infomag.iguana.be>
Date:   Tue, 7 Sep 2021 22:14:29 +0200
From:   Wim Van Sebroeck <wim@...ana.be>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        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

Hi All,

> 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 ?

This one is in linux-watchdog-next since 22 Aug.
Working on getting it upstream now.

Kind regards,
Wim.