From 4f864b0ec8493ec7c8d9aeaf75aa26adf1164dc8 Mon Sep 17 00:00:00 2001
From: Yonezawa-T2 <Yonezawa-T2@mail.dnp.co.jp>
Date: Mon, 16 Nov 2015 11:45:10 +0900
Subject: [PATCH] xbee: fixed missing unlocks

---
 drivers/xbee/xbee.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/xbee/xbee.c b/drivers/xbee/xbee.c
index eb492d547c..4ba062b484 100644
--- a/drivers/xbee/xbee.c
+++ b/drivers/xbee/xbee.c
@@ -131,6 +131,7 @@ static void _api_at_cmd(xbee_t *dev, uint8_t *cmd, uint8_t size, resp_t *resp)
     if (resp->data_len > 0) {
         memcpy(resp->data, &(dev->resp_buf[4]), resp->data_len);
     }
+    mutex_unlock(&(dev->tx_lock));
 }
 
 /*
@@ -569,6 +570,8 @@ static int _send(gnrc_netdev_t *netdev, gnrc_pktsnip_t *pkt)
     uart_write(dev->uart, dev->tx_buf, pos + 1);
     /* release data */
     gnrc_pktbuf_release(pkt);
+    /* release TX lock */
+    mutex_unlock(&(dev->tx_lock));
     /* return number of payload byte */
     return (int)size;
 }