Hi,
The panic in tty_wakeup panic on shutdown, triggered on sparc32 with
pristine kernels, is not present in Debian kernels. It turns out that the
following patch (which I was not aware of) has been used in Debian for a
while now to take care of that problem:
---------------------------cut here--------------------------------
--- kernel-source-2.6.11-2.6.11-orig/drivers/serial/serial_core.c
2005-03-02 08:37:50.000000000 +0100
+++ kernel-source-2.6.11-2.6.11/drivers/serial/serial_core.c 2005-03-05
10:46:43.417109240 +0100
@@ -108,7 +108,8 @@
static void uart_tasklet_action(unsigned long data)
{
struct uart_state *state = (struct uart_state *)data;
- tty_wakeup(state->info->tty);
+ if (state->info->tty)
+ tty_wakeup(state->info->tty);
}
static inline void
---------------------------cut here--------------------------------
As I understand it, the cause of the problem is a race condition, with
state->info->tty being destroyed somewhere between scheduling of the
tasklet and its execution. This patch is not a proper solution, as it does
not eliminate the source of the race, but hopefully it can provide the
insight needed to fix the problem.
Best regards,
Jurij Smakov [EMAIL PROTECTED]
Key: http://www.wooyd.org/pgpkey/ KeyID: C99E03CC
-
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
