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Date: Mon, 26 Nov 2018 11:24:18 +0200
From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Krzysztof =?utf-8?Q?Ol=C4=99dzki?= <ole@ans.pl>
Cc: Sasha Levin <sashal@kernel.org>, gregkh@linuxfoundation.org,
	rafael.j.wysocki@intel.com, stable@vger.kernel.org
Subject: Re: Adding iTCO_wdt fixes into 4.9-stable?
Message-ID: <20181126092418.GC2296@lahna.fi.intel.com>
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On Sat, Nov 24, 2018 at 10:01:48PM -0800, Krzysztof Olędzki wrote:
> I think older kernels should be fine, like I said - everything worked under
> 4.4-stable. I suspect this is because of some ACPI / WDAT improvements in
> 4.9, or between 4.5 - 4.8 for which we no longer support -stable. Mika, do
> you know which change exactly introduce this side effect?

IIRC it was the introduction of WDAT driver itself in commit
058dfc767008 ("ACPI / watchdog: Add support for WDAT hardware
watchdog"). The driver went into v4.9 so I don't think older stable
kernels need this.