input: psmouse: create an 'enabled' sysfs attribute to squelch mouse

index 22fe254..a115534 100644
@@ -87,6 +87,13 @@ PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
 			(void *) offsetof(struct psmouse, resync_time),
 			psmouse_show_int_attr, psmouse_set_int_attr);
+/*
+ * There's no need for a custom handler for the 'enabled' attr;
+ * psmouse_attr_set_helper will take care of disabling and enabling for us.
+ */
+PSMOUSE_DEFINE_ATTR(enabled, S_IWUSR | S_IRUGO,
+			(void *) offsetof(struct psmouse, enabled),
+			psmouse_show_int_attr, psmouse_set_int_attr);
 
 static struct attribute *psmouse_attributes[] = {
 	&psmouse_attr_protocol.dattr.attr,

@@ -94,6 +101,7 @@ static struct attribute *psmouse_attributes[] = {
 	&psmouse_attr_resolution.dattr.attr,
 	&psmouse_attr_resetafter.dattr.attr,
 	&psmouse_attr_resync_time.dattr.attr,
+	&psmouse_attr_enabled.dattr.attr,
 	NULL
 };
 

@@ -1094,6 +1102,9 @@ static void psmouse_initialize(struct psmouse *psmouse)
 
 int psmouse_activate(struct psmouse *psmouse)
 {
+	if (!psmouse->enabled)
+		return 0;
+
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
 		psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
 			     psmouse->ps2dev.serio->phys);

@@ -1256,7 +1267,8 @@ static void psmouse_cleanup(struct serio *serio)
  * Some boxes, such as HP nx7400, get terribly confused if mouse
  * is not fully enabled before suspending/shutting down.
  */
-	ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+	if (psmouse->enabled)
+		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 
 	if (parent) {
 		if (parent->pt_deactivate)

@@ -1418,6 +1430,7 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
 	psmouse->resolution = psmouse_resolution;
 	psmouse->resetafter = psmouse_resetafter;
 	psmouse->resync_time = parent ? 0 : psmouse_resync_time;
+	psmouse->enabled = true;
 	psmouse->smartscroll = psmouse_smartscroll;
 
 	psmouse_switch_protocol(psmouse, NULL);

@@ -1516,7 +1529,10 @@ static int psmouse_reconnect(struct serio *serio)
 	if (parent && parent->pt_activate)
 		parent->pt_activate(parent);
 
-	psmouse_activate(psmouse);
+	if (psmouse->enabled)
+		psmouse_activate(psmouse);
+	else
+		psmouse_deactivate(psmouse);
 	rc = 0;
 
 out:

index fe1df23..aa30321 100644
@@ -62,6 +62,7 @@ struct psmouse {
 	unsigned int resolution;
 	unsigned int resetafter;
 	unsigned int resync_time;
+	bool enabled;
 	bool smartscroll;	/* Logitech only */
 
 	psmouse_ret_t (*protocol_handler)(struct psmouse *psmouse);