From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH v3] i2c: piix4: Disable completely the IMC during
 SMBUS_BLOCK_DATA
Date: Fri, 13 Oct 2017 21:03:26 +0200
Message-ID: <20171013190326.gozfjhmv2pbmnrgt@ninjato>
References: <20171010161115.2259-1-ricardo.ribalda@gmail.com>
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To: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Cc: Jean Delvare <jdelvare@suse.de>, linux-i2c@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>


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On Tue, Oct 10, 2017 at 06:11:15PM +0200, Ricardo Ribalda Delgado wrote:
> SMBUS_BLOCK_DATA transactions might fail due to a race condition with
> the IMC (Integrated Micro Controller), even when the IMC semaphore
> is used.
>=20
> This bug has been reported and confirmed by AMD, who suggested as a
> solution an IMC firmware upgrade (obtained via BIOS update) and
> disabling the IMC during SMBUS_BLOCK_DATA transactions.
>=20
> Even without the IMC upgrade, the SMBUS is much more stable with this
> patch.
>=20
> Tested on a Bettong-alike board.
>=20
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>

Applied to for-current, thanks!


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