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    SubjectRe: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable with irqs enabled
    On Fri, 24 Apr 2009 04:10:51 -0700
    David Brownell <david-b@pacbell.net> 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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