Input: add new driver for Sentelic Finger Sensing Pad

This is the driver for Sentelic Finger Sensing Pad which can be found
on MSI WIND Netbook.

Signed-off-by: Tai-hwa Liang <avatar@sentelic.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index be5bbbb8ae4e..3a95b508bf27 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -161,7 +161,7 @@ static int ps2_adjust_timeout(struct ps2dev *ps2dev, int command, int timeout)
  * ps2_command() can only be called from a process context
  */
 
-int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
+int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
 {
         int timeout;
         int send = (command >> 12) & 0xf;
@@ -179,8 +179,6 @@ int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
                 return -1;
         }
 
-        mutex_lock(&ps2dev->cmd_mutex);
-
         serio_pause_rx(ps2dev->serio);
         ps2dev->flags = command == PS2_CMD_GETID ? PS2_FLAG_WAITID : 0;
         ps2dev->cmdcnt = receive;
@@ -231,7 +229,18 @@ int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
         ps2dev->flags = 0;
         serio_continue_rx(ps2dev->serio);
 
+        return rc;
+}
+EXPORT_SYMBOL(__ps2_command);
+
+int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
+{
+        int rc;
+
+        mutex_lock(&ps2dev->cmd_mutex);
+        rc = __ps2_command(ps2dev, param, command);
         mutex_unlock(&ps2dev->cmd_mutex);
+
         return rc;
 }
 EXPORT_SYMBOL(ps2_command);