PCI_STATUS_INTERRUPT
if (pcists & PCI_STATUS_INTERRUPT)
if (!(pcists & PCI_STATUS_INTERRUPT))
if (((status & PCI_STATUS_INTERRUPT) != 0) ^ (ep->irq_pending != 0)) {
status ^= PCI_STATUS_INTERRUPT;
irq_pending = (cmd_status_dword >> 16) & PCI_STATUS_INTERRUPT;