linux-kernel - [PATCH 4.9 022/108] i2c: piix4: Fix request

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Message-Id: <20170615175338.262496197@linuxfoundation.org>
Date:   Thu, 15 Jun 2017 19:52:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
        Jean Delvare <jdelvare@...e.de>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 022/108] i2c: piix4: Fix request_region size

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ricardo Ribalda <ricardo.ribalda@...il.com>


[ Upstream commit f43128c75202f29ee71aa83e6c320a911137c189 ]

Since '701dc207bf55 ("i2c: piix4: Avoid race conditions with IMC")' we
are using the SMBSLVCNT register at offset 0x8. We need to request it.

Fixes: 701dc207bf55 ("i2c: piix4: Avoid race conditions with IMC")
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Signed-off-by: Jean Delvare <jdelvare@...e.de>
Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/i2c/busses/i2c-piix4.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -58,7 +58,7 @@
 #define SMBSLVDAT	(0xC + piix4_smba)
 
 /* count for request_region */
-#define SMBIOSIZE	8
+#define SMBIOSIZE	9
 
 /* PCI Address Constants */
 #define SMBBA		0x090