Input: i8042 - set up shared ps2_cmd_mutex for AUX ports

[ Upstream commit 47af45d684b5f3ae000ad448db02ce4f13f73273 ]

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@wolff.to>
Tested-by: Bruno Wolff III <bruno@wolff.to>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index e7d7230a7e3133a85b6d0afd08094d9446f51e50..4cfb0ac797ef3e4519ed906fbf08e83856af1b6a 100644 (file)
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1277,6 +1277,7 @@ 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) {