Input: logips2pp - ignore mice reporting model as 0

There are mice reporting to logitech's queries with model
of 0. Do not claim that these are Logitech mice.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index d3ddea26b8ca..74a8ba7c71f8 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -338,12 +338,12 @@ int ps2pp_init(struct psmouse *psmouse, int set_properties)
         param[1] = 0;
         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 
-        if (!param[1])
-                return -1;
-
         model = ((param[0] >> 4) & 0x07) | ((param[0] << 3) & 0x78);
         buttons = param[1];
 
+        if (!model || !buttons)
+                return -1;
+
         if ((model_info = get_model_info(model)) != NULL) {
 
 /*