From dc0aa39b429a925bddcb30b05984c821a3306308 Mon Sep 17 00:00:00 2001
From: Bluebear233 <417350690@qq.com>
Date: Mon, 16 Jul 2018 09:47:36 +0800
Subject: [PATCH] =?UTF-8?q?[DeviceDriver][serial]=20=E4=BF=AE=E5=A4=8Dget?=
 =?UTF-8?q?=5Findex=E8=B6=8A=E7=95=8C=E9=97=AE=E9=A2=98?=
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---
 components/drivers/serial/serial.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index 34f8f621e7..f94b7eda01 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -393,7 +393,7 @@ static void rt_dma_recv_update_get_index(struct rt_serial_device *serial, rt_siz
     if (rx_fifo->is_full && len != 0) rx_fifo->is_full = RT_FALSE;
 
     rx_fifo->get_index += len;
-    if (rx_fifo->get_index > serial->config.bufsz)
+    if (rx_fifo->get_index >= serial->config.bufsz)
     {
         rx_fifo->get_index %= serial->config.bufsz;
     }