From dc60d68f0ed40581959a5d98d01ef8a87b776f84 Mon Sep 17 00:00:00 2001
From: LoGin <longjin@DragonOS.org>
Date: Sat, 26 Oct 2024 12:55:06 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20tty=E5=88=B7=E6=96=B0=E7=BA=BF=E7=A8=8B?=
 =?UTF-8?q?=E5=88=9D=E5=A7=8B=E5=8C=96=E4=B9=8B=E5=89=8D=EF=BC=8C=E9=94=AE?=
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 =?UTF-8?q?=E5=B4=A9=E6=BA=83=E7=9A=84=E9=97=AE=E9=A2=98=20(#1013)?=
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Signed-off-by: longjin <longjin@DragonOS.org>
---
 kernel/src/driver/tty/kthread.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/src/driver/tty/kthread.rs b/kernel/src/driver/tty/kthread.rs
index 9016b0d1..28b2fa2b 100644
--- a/kernel/src/driver/tty/kthread.rs
+++ b/kernel/src/driver/tty/kthread.rs
@@ -62,6 +62,10 @@ fn tty_refresh_thread() -> i32 {
 
 /// 发送数据到tty刷新线程
 pub fn send_to_tty_refresh_thread(data: &[u8]) {
+    if unsafe { TTY_REFRESH_THREAD.is_none() } {
+        return;
+    }
+
     for item in data {
         KEYBUF.push(*item).ok();
     }