diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index c01e26d9ee5ecfff6d51b7de24e8abf536b86d38..f3fe620673440e267172e957f174028933beacbc 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2484,6 +2484,7 @@ static int __init espserial_init(void)
 			return 0;
 		}
 
+		spin_lock_init(&info->lock);
 		/* rx_trigger, tx_trigger are needed by autoconfig */
 		info->config.rx_trigger = rx_trigger;
 		info->config.tx_trigger = tx_trigger;