Input: ALPS - fix command mode check

Pinnacle class devices should return "88 07 xx" or "88 08 xx" when
entering command mode.  If either the first byte or the second byte is
invalid, return an error.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Tested-by: Dave Turvene <dturvene@dahetral.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index eafeae2..bfc1938 100644 (file)
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -983,7 +983,7 @@ static int alps_enter_command_mode(struct psmouse *psmouse,
                return -1;
        }
 
-       if (param[0] != 0x88 && param[1] != 0x07) {
+       if (param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) {
                psmouse_dbg(psmouse,
                            "unknown response while entering command mode\n");
                return -1;