[PATCH 1/3] genirq: Allow the irqchip state of an IRQ to be save/restored

[Thomas Gleixner]

On Sat, 25 Oct 2014, Marc Zyngier wrote:
> +int irq_get_irqchip_state(unsigned int irq, int state)
> +{
> +	struct irq_desc *desc;
> +	struct irq_data *data;
> +	struct irq_chip *chip;
> +	int val;
> +
> +	desc = irq_to_desc(irq);
> +	if (!desc)
> +		return -EINVAL;
> +
> +	data = irq_desc_get_irq_data(desc);
> +
> +	chip = irq_desc_get_chip(desc);
> +	if (!chip->irq_get_irqchip_state)
> +		return -EINVAL;
> +
> +	chip_bus_lock(desc);
> +	val = chip->irq_get_irqchip_state(data, state);

Hmm. What's the irq_get_irqchip_state() callback supposed to return?

Thanks,

	tglx