On Fri, 30 May 2008 22:09:04 +0400
Evgeniy Polyakov <johnpol@xxxxxxxxxxx> wrote:
> Hi.
>
> On Thu, May 29, 2008 at 02:12:50PM -0500, Kim Phillips (kim.phillips@xxxxxxxxxxxxx) wrote:
>
> > +static irqreturn_t talitos_interrupt(int irq, void *data)
> > +{
> > + struct device *dev = data;
> > + struct talitos_private *priv = dev_get_drvdata(dev);
> > +
> > + priv->status = in_be32(priv->reg + TALITOS_ISR);
> > + priv->status_lo = in_be32(priv->reg + TALITOS_ISR_LO);
> > +
> > + if (unlikely(priv->status & ~TALITOS_ISR_CHDONE)) {
> > + talitos_error((unsigned long)data);
> > + /* ack */
> > + out_be32(priv->reg + TALITOS_ICR, priv->status);
> > + out_be32(priv->reg + TALITOS_ICR_LO, priv->status_lo);
> > + }
> > + else
> > + {
> > + /* ack */
> > + out_be32(priv->reg + TALITOS_ICR, priv->status);
> > + out_be32(priv->reg + TALITOS_ICR_LO, priv->status_lo);
> > +
> > + if (likely(priv->status & TALITOS_ISR_CHDONE))
> > + tasklet_schedule(&priv->done_task);
> > + }
> > +
> > + return (priv->status || priv->status_lo) ? IRQ_HANDLED : IRQ_NONE;
> > +}
>
> Don't you want to protect against simultaneous access to register space
> from different CPUs? Or it is single processor board only?
Doesn't linux mask the IRQ line for the interrupt currently being
serviced, and on all processors?
Kim
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