[PATCH] libata: convert pio_task and packet_task to port_task

Make pio_task and atapi_packet_task use port_task.
atapi_packet_task() is moved upward such that it's right after
ata_pio_task().  This position is more natural and makes adding
prototype for ata_qc_issue_prot() unnecessary.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/scsi/libata-core.c

@@ -3709,11 +3709,83 @@ static void ata_pio_task(void *_data)
 	}
 
 	if (timeout)
-		ata_queue_delayed_pio_task(ap, timeout);
+		ata_port_queue_task(ap, ata_pio_task, ap, timeout);
 	else if (!qc_completed)
 		goto fsm_start;
 }
 
+/**
+ *	atapi_packet_task - Write CDB bytes to hardware
+ *	@_data: Port to which ATAPI device is attached.
+ *
+ *	When device has indicated its readiness to accept
+ *	a CDB, this function is called.  Send the CDB.
+ *	If DMA is to be performed, exit immediately.
+ *	Otherwise, we are in polling mode, so poll
+ *	status under operation succeeds or fails.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ */
+
+static void atapi_packet_task(void *_data)
+{
+	struct ata_port *ap = _data;
+	struct ata_queued_cmd *qc;
+	u8 status;
+
+	qc = ata_qc_from_tag(ap, ap->active_tag);
+	WARN_ON(qc == NULL);
+	WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
+
+	/* sleep-wait for BSY to clear */
+	DPRINTK("busy wait\n");
+	if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
+		qc->err_mask |= AC_ERR_TIMEOUT;
+		goto err_out;
+	}
+
+	/* make sure DRQ is set */
+	status = ata_chk_status(ap);
+	if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+		qc->err_mask |= AC_ERR_HSM;
+		goto err_out;
+	}
+
+	/* send SCSI cdb */
+	DPRINTK("send cdb\n");
+	WARN_ON(qc->dev->cdb_len < 12);
+
+	if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
+	    qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
+		unsigned long flags;
+
+		/* Once we're done issuing command and kicking bmdma,
+		 * irq handler takes over.  To not lose irq, we need
+		 * to clear NOINTR flag before sending cdb, but
+		 * interrupt handler shouldn't be invoked before we're
+		 * finished.  Hence, the following locking.
+		 */
+		spin_lock_irqsave(&ap->host_set->lock, flags);
+		ap->flags &= ~ATA_FLAG_NOINTR;
+		ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+		if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
+			ap->ops->bmdma_start(qc);	/* initiate bmdma */
+		spin_unlock_irqrestore(&ap->host_set->lock, flags);
+	} else {
+		ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+
+		/* PIO commands are handled by polling */
+		ap->hsm_task_state = HSM_ST;
+		ata_port_queue_task(ap, ata_pio_task, ap, 0);
+	}
+
+	return;
+
+err_out:
+	ata_poll_qc_complete(qc);
+}
+
 /**
  *	ata_qc_timeout - Handle timeout of queued command
  *	@qc: Command that timed out
@@ -4013,26 +4085,26 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
 		ata_qc_set_polling(qc);
 		ata_tf_to_host(ap, &qc->tf);
 		ap->hsm_task_state = HSM_ST;
-		ata_queue_pio_task(ap);
+		ata_port_queue_task(ap, ata_pio_task, ap, 0);
 		break;
 
 	case ATA_PROT_ATAPI:
 		ata_qc_set_polling(qc);
 		ata_tf_to_host(ap, &qc->tf);
-		ata_queue_packet_task(ap);
+		ata_port_queue_task(ap, atapi_packet_task, ap, 0);
 		break;
 
 	case ATA_PROT_ATAPI_NODATA:
 		ap->flags |= ATA_FLAG_NOINTR;
 		ata_tf_to_host(ap, &qc->tf);
-		ata_queue_packet_task(ap);
+		ata_port_queue_task(ap, atapi_packet_task, ap, 0);
 		break;
 
 	case ATA_PROT_ATAPI_DMA:
 		ap->flags |= ATA_FLAG_NOINTR;
 		ap->ops->tf_load(ap, &qc->tf);	 /* load tf registers */
 		ap->ops->bmdma_setup(qc);	    /* set up bmdma */
-		ata_queue_packet_task(ap);
+		ata_port_queue_task(ap, atapi_packet_task, ap, 0);
 		break;
 
 	default:
@@ -4400,78 +4472,6 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
 	return IRQ_RETVAL(handled);
 }
 
-/**
- *	atapi_packet_task - Write CDB bytes to hardware
- *	@_data: Port to which ATAPI device is attached.
- *
- *	When device has indicated its readiness to accept
- *	a CDB, this function is called.  Send the CDB.
- *	If DMA is to be performed, exit immediately.
- *	Otherwise, we are in polling mode, so poll
- *	status under operation succeeds or fails.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep)
- */
-
-static void atapi_packet_task(void *_data)
-{
-	struct ata_port *ap = _data;
-	struct ata_queued_cmd *qc;
-	u8 status;
-
-	qc = ata_qc_from_tag(ap, ap->active_tag);
-	WARN_ON(qc == NULL);
-	WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
-
-	/* sleep-wait for BSY to clear */
-	DPRINTK("busy wait\n");
-	if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
-		qc->err_mask |= AC_ERR_TIMEOUT;
-		goto err_out;
-	}
-
-	/* make sure DRQ is set */
-	status = ata_chk_status(ap);
-	if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
-		qc->err_mask |= AC_ERR_HSM;
-		goto err_out;
-	}
-
-	/* send SCSI cdb */
-	DPRINTK("send cdb\n");
-	WARN_ON(qc->dev->cdb_len < 12);
-
-	if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
-	    qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
-		unsigned long flags;
-
-		/* Once we're done issuing command and kicking bmdma,
-		 * irq handler takes over.  To not lose irq, we need
-		 * to clear NOINTR flag before sending cdb, but
-		 * interrupt handler shouldn't be invoked before we're
-		 * finished.  Hence, the following locking.
-		 */
-		spin_lock_irqsave(&ap->host_set->lock, flags);
-		ap->flags &= ~ATA_FLAG_NOINTR;
-		ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
-		if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
-			ap->ops->bmdma_start(qc);	/* initiate bmdma */
-		spin_unlock_irqrestore(&ap->host_set->lock, flags);
-	} else {
-		ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
-
-		/* PIO commands are handled by polling */
-		ap->hsm_task_state = HSM_ST;
-		ata_queue_pio_task(ap);
-	}
-
-	return;
-
-err_out:
-	ata_poll_qc_complete(qc);
-}
-
 
 /*
  * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,