[PATCH 4.4 090/113] Input: i8042 - set up shared ps2_cmd_mutex for AUX ports

From: Greg Kroah-Hartman
Date: Mon Sep 05 2016 - 12:55:48 EST


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

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

From: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>

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@xxxxxxxx>
Tested-by: Bruno Wolff III <bruno@xxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/input/serio/i8042.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1305,6 +1305,7 @@ static int __init i8042_create_aux_port(
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) {