[RFC v2 01/10] arm: fiq: Allow EOI to be communicated to the intc

[Russell King - ARM Linux]

On Fri, May 23, 2014 at 02:57:49PM +0100, Daniel Thompson wrote:
> +void eoi_fiq(int fiq)
> +{
> +	struct irq_data *irq_data = irq_get_irq_data(fiq + fiq_start);
> +	struct irq_chip *chip = irq_data_get_irq_chip(irq_data);
> +
> +	if (chip->irq_eoi)
> +			chip->irq_eoi(irq_data);
> +}

So what if the IRQ chip takes a spinlock?  You can't take spinlocks in
FIQ context...  Who checks for that kind of stuff - just hoping that
the IRQ driver doesn't take a spinlock sounds real fragile.

-- 
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.