Hi Dave,
On Wednesday 27 June 2007 06:59, Dave Young wrote:
> 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 <[EMAIL PROTECTED]>
> ---
> 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;
Unfortunately this will prevent atkbd from resetting keyboard on 2nd
suspend attempt. It will also not work if you have an active MUX and
have a couple of keyboards connected.
Greg, now that you removed rwsem from subsystem (and subsystem itself
for that matter) there is nothing as far as I can see that stops
several threads from running device_shutdown() simultaneously. I also
do not see what would isolate device probing and shutting them down
at the same time. Am I missing something?
--
Dmitry
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