[PATCH] console blanking oops fix
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>
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@ -2867,6 +2867,10 @@ void unblank_screen(void)
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*/
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static void blank_screen_t(unsigned long dummy)
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{
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if (unlikely(!keventd_up())) {
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mod_timer(&console_timer, jiffies + blankinterval);
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return;
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}
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blank_timer_expired = 1;
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schedule_work(&console_work);
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}
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