From 5457a9a450b0dbb3ab36cd98a4b76dddccfd149d Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Thu, 3 Feb 2022 11:48:44 +0800
Subject: [PATCH] serial/pty: fix the lock handling

Signed-off-by: chao.an <anchao@xiaomi.com>
---
 drivers/serial/pty.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/pty.c b/drivers/serial/pty.c
index ca238d9fc9..d6be3526eb 100644
--- a/drivers/serial/pty.c
+++ b/drivers/serial/pty.c
@@ -298,6 +298,7 @@ static int pty_open(FAR struct file *filep)
           ret = nxsem_wait(&devpair->pp_slavesem);
           if (ret < 0)
             {
+              sched_unlock();
               return ret;
             }
 
@@ -308,6 +309,7 @@ static int pty_open(FAR struct file *filep)
           ret = pty_semtake(devpair);
           if (ret < 0)
             {
+              sched_unlock();
               return ret;
             }
 
@@ -335,7 +337,7 @@ static int pty_open(FAR struct file *filep)
       ret = pty_semtake(devpair);
       if (ret < 0)
         {
-          goto errout_with_sem;
+          return ret;
         }
     }
 
@@ -362,7 +364,6 @@ static int pty_open(FAR struct file *filep)
       ret = OK;
     }
 
-errout_with_sem:
   pty_semgive(devpair);
   return ret;
 }