Create an irq and attach it to a device.
int __ht_create_irq(struct pci_dev * dev, int idx, ht_irq_update_t * update);
dev
The hypertransport device to find the irq capability on.
idx
Which of the possible irqs to attach to.
update
Function to be called when changing the htirq message
The irq number of the new irq or a negative error value is returned.