static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
{
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
int handled;
/* freeze if hotplugged */
if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
ata_port_freeze(ap);
return 1;
}
/* bail out if not our interrupt */
if (!(irq_stat & NV_INT_DEV))
return 0;
/* DEV interrupt w/ no active qc? */
if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
ata_check_status(ap);
return 1;
}
/* handle interrupt */
handled = ata_host_intr(ap, qc);
if (unlikely(!handled)) {
/* spurious, clear it */
ata_check_status(ap);
}
return 1;
}
static void inic_host_intr(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
struct ata_eh_info *ehi = &ap->link.eh_info;
u8 irq_stat;
/* fetch and clear irq */
irq_stat = readb(port_base + PORT_IRQ_STAT);
writeb(irq_stat, port_base + PORT_IRQ_STAT);
if (likely(!(irq_stat & PIRQ_ERR))) {
struct ata_queued_cmd *qc =
ata_qc_from_tag(ap, ap->link.active_tag);
if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
ata_chk_status(ap); /* clear ATA interrupt */
return;
}
if (likely(ata_host_intr(ap, qc)))
return;
ata_chk_status(ap); /* clear ATA interrupt */
ata_port_printk(ap, KERN_WARNING, "unhandled "
"interrupt, irq_stat=%x\n", irq_stat);
return;
}
/* error */
ata_ehi_push_desc(ehi, "irq_stat=0x%x", irq_stat);
if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
ata_ehi_hotplugged(ehi);
ata_port_freeze(ap);
} else
ata_port_abort(ap);
}
