diff --git a/[refs] b/[refs]
index 3e1b518d941f..49aa67bc3104 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8d04ddb64c7bf62aec1102fddc5336a68bcaebe9
+refs/heads/master: 688897b0d4910e097f34c0e263d649cf2036eb45
diff --git a/trunk/drivers/input/mouse/logips2pp.c b/trunk/drivers/input/mouse/logips2pp.c
index d3ddea26b8ca..74a8ba7c71f8 100644
--- a/trunk/drivers/input/mouse/logips2pp.c
+++ b/trunk/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) {
 
 /*