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Date: Wed, 27 Jun 2007 10:59:07 +0000
From: Dave Young <hidave.darkstar@...il.com>
To: dmitry.torokhov@...il.com
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] atkbd: cleanup only once
Hi,
If you press ctrl+alt+del several times as kernel booting (before user level bootin), the kernel will oops. I found the ps2_command is called more than once, then the ps2dev->serio maybe NULL pointer.
2.6.22-rc5 and 2.6.22-rc6 have same result.
Signed-off-by: Dave Young <hidave.darkstar@...il.com>
---
diff -upr linux/drivers/input/keyboard/atkbd.c linux.new/drivers/input/keyboard/atkbd.c
--- linux/drivers/input/keyboard/atkbd.c 2007-06-27 10:38:37.000000000 +0000
+++ linux.new/drivers/input/keyboard/atkbd.c 2007-06-27 10:37:39.000000000 +0000
@@ -795,6 +795,11 @@ static int atkbd_activate(struct atkbd *
static void atkbd_cleanup(struct serio *serio)
{
+ static int flag;
+
+ if(flag)
+ return;
+ flag = 1;
struct atkbd *atkbd = serio_get_drvdata(serio);
ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_BAT);
}
Regards
dave
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