+ * ata_bmdma_port_intr - Handle BMDMA port interrupt
+ * @ap: Port on which interrupt arrived (possibly...)
+ * @qc: Taskfile currently active in engine
+ *
+ * Handle port interrupt for given queued command.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * One if interrupt was handled, zero if not (shared irq).
+ */
+unsigned int ata_bmdma_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ u8 host_stat = 0;
+ bool bmdma_stopped = false;
+ unsigned int handled;
+
+ if (ap->hsm_task_state == HSM_ST_LAST && ata_is_dma(qc->tf.protocol)) {
+ /* check status of DMA engine */
+ host_stat = ap->ops->bmdma_status(ap);
+ VPRINTK("ata%u: host_stat 0x%X\n", ap->print_id, host_stat);
+
+ /* if it's not our irq... */
+ if (!(host_stat & ATA_DMA_INTR))
+ return ata_sff_idle_irq(ap);
+
+ /* before we do anything else, clear DMA-Start bit */
+ ap->ops->bmdma_stop(qc);
+ bmdma_stopped = true;
+
+ if (unlikely(host_stat & ATA_DMA_ERR)) {
+ /* error when transfering data to/from memory */
+ qc->err_mask |= AC_ERR_HOST_BUS;
+ ap->hsm_task_state = HSM_ST_ERR;
+ }
+ }
+
+ handled = __ata_sff_port_intr(ap, qc, bmdma_stopped);
+
+ if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
+ ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
+
+ return handled;
+}
+EXPORT_SYMBOL_GPL(ata_bmdma_port_intr);
+
+/**
+ * ata_bmdma_interrupt - Default BMDMA ATA host interrupt handler
+ * @irq: irq line (unused)
+ * @dev_instance: pointer to our ata_host information structure
+ *
+ * Default interrupt handler for PCI IDE devices. Calls
+ * ata_bmdma_port_intr() for each port that is not disabled.
+ *
+ * LOCKING:
+ * Obtains host lock during operation.
+ *
+ * RETURNS:
+ * IRQ_NONE or IRQ_HANDLED.
+ */
+irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance)
+{
+ return __ata_sff_interrupt(irq, dev_instance, ata_bmdma_port_intr);
+}
+EXPORT_SYMBOL_GPL(ata_bmdma_interrupt);
+
+/**