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[PATCH] console blanking oops fix

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When significant delays happen during boot (e.g.  with a kernel debugger,
but the problem has also seen in other cases) the timeout for blanking the
console may trigger, but the work scheduler may not have been initialized,
yet.  schedule_work() will oops over the null keventd_wq.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich 2005-06-17 13:20:58 -07:00 • committed by Linus Torvalds
parent 43fde784a6
commit cc63b1e12b
1 changed files with 4 additions and 0 deletions
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4
drivers/char/vt.c
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@ -2867,6 +2867,10 @@ void unblank_screen(void)
*/ */
static void blank_screen_t(unsigned long dummy) static void blank_screen_t(unsigned long dummy)
{ {
if (unlikely(!keventd_up())) {
mod_timer(&console_timer, jiffies + blankinterval);
return;
}
blank_timer_expired = 1; blank_timer_expired = 1;
schedule_work(&console_work); schedule_work(&console_work);
} }