ACPI: EC: Block queries until EC is fully initialized

Signed-off-by: NAlexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/acpi/ec.c

@@ -599,7 +599,7 @@ static struct acpi_ec *make_acpi_ec(void)
 	if (!ec)
 		return NULL;
 
-	atomic_set(&ec->query_pending, 0);
+	atomic_set(&ec->query_pending, 1);
 	atomic_set(&ec->event_count, 1);
 	mutex_init(&ec->lock);
 	init_waitqueue_head(&ec->wait);
@@ -715,6 +715,9 @@ static int ec_install_handlers(struct acpi_ec *ec)
 		return -ENODEV;
 	}
 
+	/* EC is fully operational, allow queries */
+	atomic_set(&ec->query_pending, 0);
+
 	return 0;
 }