linux-kernel - [PATCH 3.12 029/119] Input: i8042 - set up shared ps2_cmd

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Message-Id: <1bc74ff3eeb249ab98674bb31e92abee566bb3d5.1475144721.git.jslaby@suse.cz>
Date:   Thu, 29 Sep 2016 12:24:25 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 029/119] Input: i8042 - set up shared ps2_cmd_mutex for AUX ports

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

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

===============

commit 47af45d684b5f3ae000ad448db02ce4f13f73273 upstream.

The commit 4097461897df ("Input: i8042 - break load dependency ...")
correctly set up ps2_cmd_mutex pointer for the KBD port but forgot to do
the same for AUX port(s), which results in communication on KBD and AUX
ports to clash with each other.

Fixes: 4097461897df ("Input: i8042 - break load dependency ...")
Reported-by: Bruno Wolff III <bruno@...ff.to>
Tested-by: Bruno Wolff III <bruno@...ff.to>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/input/serio/i8042.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 7ecca05bd7a5..09da61eb07fa 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1258,6 +1258,7 @@ static int __init i8042_create_aux_port(int idx)
 	serio->write		= i8042_aux_write;
 	serio->start		= i8042_start;
 	serio->stop		= i8042_stop;
+	serio->ps2_cmd_mutex	= &i8042_mutex;
 	serio->port_data	= port;
 	serio->dev.parent	= &i8042_platform_device->dev;
 	if (idx < 0) {
-- 
2.10.0