From 3cf618019676b877c83975bbbc636033cdcbda37 Mon Sep 17 00:00:00 2001
From: Marian Ohligs <marian.ohligs@rwth-aachen.de>
Date: Tue, 24 May 2011 00:56:21 +0200
Subject: [PATCH] fix some strange behavior with backspace

---
 arch/x86/kernel/kb.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/kb.c b/arch/x86/kernel/kb.c
index 7307852e..70911518 100644
--- a/arch/x86/kernel/kb.c
+++ b/arch/x86/kernel/kb.c
@@ -110,8 +110,13 @@ static void keyboard_handler(struct state *r)
 		 */
 		kputchar(kbdus[scancode]);
 		if (kb_buffer.size <= kb_buffer.maxsize && kb_buffer.buffer != NULL) {
-			memcpy(kb_buffer.buffer + kb_buffer.size, &kbdus[scancode], 1);
-			kb_buffer.size++;
+			if (scancode == 14) {
+				kb_buffer.size--;
+			}
+			else {
+				memcpy(kb_buffer.buffer + kb_buffer.size, &kbdus[scancode], 1);
+				kb_buffer.size++;
+			}
 			if (scancode == 28 || scancode == 15 || kb_buffer.size >= kb_buffer.maxsize) {
 				wakeup_task(kb_buffer.tid);
 				reschedule();