From 19432f62abd5caed4d5e42b9da132e2febd0bbb3 Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Fri, 20 Aug 2021 13:36:39 +0800
Subject: [PATCH] sched/backtrace: simplify the assign of tcb in case of
 negative pid

Change-Id: I447a905f105131d1e3527800a8686d516af2affc
Signed-off-by: chao.an <anchao@xiaomi.com>
---
 sched/sched/sched_backtrace.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/sched/sched/sched_backtrace.c b/sched/sched/sched_backtrace.c
index a887b7805b9..6c3ab7d055a 100644
--- a/sched/sched/sched_backtrace.c
+++ b/sched/sched/sched_backtrace.c
@@ -42,20 +42,15 @@
 
 int sched_backtrace(pid_t tid, FAR void **buffer, int size)
 {
-  FAR struct tcb_s *rtcb;
+  FAR struct tcb_s *rtcb = NULL;
 
-  if (tid < 0)
-    {
-      rtcb = running_task();
-    }
-  else
+  if (tid >= 0)
     {
       rtcb = nxsched_get_tcb(tid);
-    }
-
-  if (rtcb == NULL)
-    {
-      return 0;
+      if (rtcb == NULL)
+        {
+          return 0;
+        }
     }
 
   return up_backtrace(rtcb, buffer, size);