1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index d3ddea26b8c..9df74b72e6c 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -200,6 +200,7 @@ static void ps2pp_disconnect(struct psmouse *psmouse)
 static const struct ps2pp_info *get_model_info(unsigned char model)
 {
         static const struct ps2pp_info ps2pp_list[] = {
+                {  1,   0,                      0 },    /* Simple 2-button mouse */
                 { 12,   0,                      PS2PP_SIDE_BTN},
                 { 13,   0,                      0 },
                 { 15,   PS2PP_KIND_MX,                                  /* MX1000 */
@@ -338,12 +339,12 @@ 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) {
 
 /*