Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable withirqs enabled

[Alessandro Zummo]

On Fri, 24 Apr 2009 04:10:51 -0700
David Brownell <david-b@xxxxxxxxxxx> wrote:

> >  use spin_lock() in the IRQ handler and spin_lock_irq/irq_save
> >  in the setup functions.  
> 
> I think you're describing how the *current* scheme is supposed
> to work ... except that some IRQ handlers aren't calling the
> rtc_update_irq() routine with IRQs blocked.
> 
> Yes, that current scheme works ... modulo those buggy handlers.

 ok, but why it's necessary to disable the interrupts? Only because
 the specs says so or because there's a locking issue I'm missing?

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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