On 17:42-20150107, Marc Zyngier wrote:
a few more minor comments follow:
[..]
> --- a/drivers/irqchip/irq-crossbar.c
> +++ b/drivers/irqchip/irq-crossbar.c
[..]
> @@ -33,6 +34,7 @@
> * @write: register write function pointer
> */
> struct crossbar_device {
> + raw_spinlock_t lock;
^^ kernel doc missing.
[...]
> +static int crossbar_domain_alloc(struct irq_domain *d, unsigned int virq,
> + unsigned int nr_irqs, void *data)
> {
> - if (needs_crossbar_write(hw))
> - cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
> + struct of_phandle_args *args = data;
> + irq_hw_number_t hwirq;
> + int i;
> +
> + if (args->args_count != 3)
> + return -EINVAL; /* Not GIC compliant */
> + if (args->args[0] != 0)
> + return -EINVAL; /* No PPI should point to this domain */
> +
> + hwirq = args->args[1];
> + if ((hwirq + nr_irqs) > cb->max_crossbar_sources)
> + return -EINVAL; /* Can't deal with this */
> +
> + for (i = 0; i < nr_irqs; i++) {
> + int err = allocate_gic_irq(d, virq + i, hwirq + i);
^^ add a blank line here?
> + if (err)
> + return err;
> +
> + irq_domain_set_hwirq_and_chip(d, virq + i, hwirq + i,
> + &crossbar_chip, NULL);
> + }
>
> return 0;
> }
>
> /**
> - * crossbar_domain_unmap - unmap a crossbar<->irq connection
> + * crossbar_domain_free - unmap/free a crossbar<->irq connection
> * @d: domain of irq to unmap
^^ should be @domain?
> - * @irq: virq number
> + * @virq: virq number
> + * @nr_irqs: number of irqs to free
> *
> * We do not maintain a use count of total number of map/unmap
> * calls for a particular irq to find out if a irq can be really
> @@ -117,14 +144,19 @@ static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
> * after which irq is anyways unusable. So an explicit map has to be called
> * after that.
> */
> -static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq)
> +static void crossbar_domain_free(struct irq_domain *domain, unsigned int virq,
> + unsigned int nr_irqs)
> {
> - irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq;
> + int i;
>
> - if (needs_crossbar_write(hw)) {
> - cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
> - cb->write(hw - GIC_IRQ_START, cb->safe_map);
> + raw_spin_lock(&cb->lock);
> + for (i = 0; i < nr_irqs; i++) {
> + struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
^^ Add a blank line here.
--
Regards,
Nishanth Menon
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