Re: [PATCH] pcxx: replace cli()/sti() withspin_lock_irqsave()/spin_unlock_irqrestore()

From: Alan Cox
Date: Mon Dec 20 2004 - 16:33:55 EST

On Llu, 2004-12-20 at 14:59, Alan Cox wrote:
> On Gwe, 2004-12-17 at 22:34, James Nelson wrote:
> > - save_flags(flags);
> > - cli();
> > + spin_lock_irqsave(&pcxx_lock, flags);
> > del_timer_sync(&pcxx_timer);
> Not safe if the lock is grabbed by the timer between the lock and the
> irqsave as it will spin on another cpu and the timer delete will never
> finish.

Error between brain and keyboard

Between the lock and the timer_delete of course
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