Re: [PATCH 2/2] talitos: Freescale integrated security engine (SEC) driver

[Evgeniy Polyakov <johnpol@xxxxxxxxxxx>]

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?

-- 
	Evgeniy Polyakov
--
To unsubscribe from this list: send the line "unsubscribe linux-crypto" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html