cris: return of class_create should be considered

Return value of class_create should be considered in module init function.
Signed-off-by: NZhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: NJesper Nilsson <jespern@axis.com>

arch/cris/arch-v32/drivers/sync_serial.c

@@ -1627,6 +1627,12 @@ static int __init etrax_sync_serial_init(void)
 
 	/* Create a sysfs class for syncser */
 	syncser_class = class_create(THIS_MODULE, "syncser_class");
+	if (IS_ERR(syncser_class)) {
+		pr_err("Failed to create a sysfs class for syncser\n");
+		unregister_chrdev_region(syncser_first, minor_count);
+		cdev_del(syncser_cdev);
+		return -1;
+	}
 
 	/* Initialize Ports */
 #if defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT0)