From 67b38d1aad8877445d1e72e7db37896e0ba66321 Mon Sep 17 00:00:00 2001
From: Rbb666 <zhangbingru@rt-thread.com>
Date: Wed, 5 Jul 2023 19:30:08 +0800
Subject: [PATCH] =?UTF-8?q?[kernel]=E6=94=AF=E6=8C=81=E5=A4=9A=E4=B8=AA?=
 =?UTF-8?q?=E7=BA=BF=E7=A8=8B=E6=8E=A5=E6=94=B6=E5=90=8C=E4=B8=80=E4=B8=AA?=
 =?UTF-8?q?=E4=BA=8B=E4=BB=B6?=
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---
 src/ipc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ipc.c b/src/ipc.c
index d97fa1d35a..b6bf08770d 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -1770,6 +1770,7 @@ rt_err_t rt_event_send(rt_event_t event, rt_uint32_t set)
     rt_base_t level;
     rt_base_t status;
     rt_bool_t need_schedule;
+    rt_uint32_t need_clear_set = 0;
 
     /* parameter check */
     RT_ASSERT(event != RT_NULL);
@@ -1833,7 +1834,7 @@ rt_err_t rt_event_send(rt_event_t event, rt_uint32_t set)
             {
                 /* clear event */
                 if (thread->event_info & RT_EVENT_FLAG_CLEAR)
-                    event->set &= ~thread->event_set;
+                    need_clear_set |= thread->event_set;
 
                 /* resume thread, and thread list breaks out */
                 rt_thread_resume(thread);
@@ -1843,6 +1844,10 @@ rt_err_t rt_event_send(rt_event_t event, rt_uint32_t set)
                 need_schedule = RT_TRUE;
             }
         }
+        if (need_clear_set)
+        {
+            event->set &= ~need_clear_set;
+        }
     }
 
     /* enable interrupt */