From faebb71b8a84e33f4f2b3f8f70f845011483c5c5 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 1 May 2024 18:38:22 +0200
Subject: Kernel/Keyboard: Only write to buffer after it is initialized

---
 kernel/drivers/keyboard.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'kernel/drivers')

diff --git a/kernel/drivers/keyboard.c b/kernel/drivers/keyboard.c
index a120788..fb85e39 100644
--- a/kernel/drivers/keyboard.c
+++ b/kernel/drivers/keyboard.c
@@ -86,7 +86,7 @@ u8 capital_ascii_table[] = {
     ' ', // ;
 };
 
-vfs_inode_t *kb_inode;
+vfs_inode_t *kb_inode = NULL;
 
 u8 keyboard_to_ascii(u16 key, u8 capital) {
   if ((key & 0xFF) > sizeof(ascii_table)) {
@@ -112,9 +112,12 @@ struct KEY_EVENT {
 extern process_t *ready_queue;
 
 void int_keyboard(reg_t *frame) {
-  outb(0x20, 0x20);
   u16 c;
   c = inb(PS2_REG_DATA);
+  outb(0x20, 0x20);
+  if (!kb_inode) {
+    return;
+  }
   int released = 0;
   if (c & 0x80) {
     switch ((c & ~(0x80)) & 0xFF) {
-- 
cgit v1.2.3