From 7cd2f0a979bb4431bf2a5b55c1ba995118cfa262 Mon Sep 17 00:00:00 2001
From: armink <armink.ztl@gmail.com>
Date: Sun, 12 Apr 2020 22:52:43 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90=E5=AE=8C=E5=96=84=E3=80=91env=20?=
 =?UTF-8?q?=E8=8E=B7=E5=8F=96=E5=8A=9F=E8=83=BD=EF=BC=8C=E6=9F=A5=E6=89=BE?=
 =?UTF-8?q?=E5=A4=B1=E8=B4=A5=E5=90=8E=EF=BC=8Csave=5Flen=20=E5=B0=86?=
 =?UTF-8?q?=E8=A2=AB=E7=BD=AE=200=20=E3=80=82?=
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Signed-off-by: armink <armink.ztl@gmail.com>
---
 easyflash/src/ef_env.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/easyflash/src/ef_env.c b/easyflash/src/ef_env.c
index 5a445ce..01bac5a 100644
--- a/easyflash/src/ef_env.c
+++ b/easyflash/src/ef_env.c
@@ -787,6 +787,8 @@ static size_t get_env(const char *key, void *value_buf, size_t buf_len, size_t *
         if (value_buf){
             ef_port_read(env.addr.value, (uint32_t *) value_buf, read_len);
         }
+    } else if (value_len) {
+        *value_len = 0;
     }
 
     return read_len;