[PATCH] libata: separate out libata-eh.c

A lot of EH codes are about to be added to libata.  Separate out
libata-eh.c.  ata_scsi_timed_out(), ata_scsi_error(),
ata_qc_timeout(), ata_eng_timeout(), ata_eh_qc_complete() and
ata_eh_qc_retry() are moved.  No code is changed by this patch.

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

drivers/scsi/Makefile

@@ -165,7 +165,7 @@ ncr53c8xx-flags-$(CONFIG_SCSI_ZALON) \
 CFLAGS_ncr53c8xx.o	:= $(ncr53c8xx-flags-y) $(ncr53c8xx-flags-m)
 zalon7xx-objs	:= zalon.o ncr53c8xx.o
 NCR_Q720_mod-objs	:= NCR_Q720.o ncr53c8xx.o
-libata-objs	:= libata-core.o libata-scsi.o libata-bmdma.o
+libata-objs	:= libata-core.o libata-scsi.o libata-bmdma.o libata-eh.o
 oktagon_esp_mod-objs	:= oktagon_esp.o oktagon_io.o
 
 # Files generated that shall be removed upon make clean

drivers/scsi/libata-core.c

@@ -4015,99 +4015,6 @@ static void atapi_packet_task(void *_data)
 	ata_poll_qc_complete(qc);
 }
 
-/**
- *	ata_qc_timeout - Handle timeout of queued command
- *	@qc: Command that timed out
- *
- *	Some part of the kernel (currently, only the SCSI layer)
- *	has noticed that the active command on port @ap has not
- *	completed after a specified length of time.  Handle this
- *	condition by disabling DMA (if necessary) and completing
- *	transactions, with error if necessary.
- *
- *	This also handles the case of the "lost interrupt", where
- *	for some reason (possibly hardware bug, possibly driver bug)
- *	an interrupt was not delivered to the driver, even though the
- *	transaction completed successfully.
- *
- *	LOCKING:
- *	Inherited from SCSI layer (none, can sleep)
- */
-
-static void ata_qc_timeout(struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	struct ata_host_set *host_set = ap->host_set;
-	u8 host_stat = 0, drv_stat;
-	unsigned long flags;
-
-	DPRINTK("ENTER\n");
-
-	ap->hsm_task_state = HSM_ST_IDLE;
-
-	spin_lock_irqsave(&host_set->lock, flags);
-
-	switch (qc->tf.protocol) {
-
-	case ATA_PROT_DMA:
-	case ATA_PROT_ATAPI_DMA:
-		host_stat = ap->ops->bmdma_status(ap);
-
-		/* before we do anything else, clear DMA-Start bit */
-		ap->ops->bmdma_stop(qc);
-
-		/* fall through */
-
-	default:
-		ata_altstatus(ap);
-		drv_stat = ata_chk_status(ap);
-
-		/* ack bmdma irq events */
-		ap->ops->irq_clear(ap);
-
-		printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
-		       ap->id, qc->tf.command, drv_stat, host_stat);
-
-		/* complete taskfile transaction */
-		qc->err_mask |= ac_err_mask(drv_stat);
-		break;
-	}
-
-	spin_unlock_irqrestore(&host_set->lock, flags);
-
-	ata_eh_qc_complete(qc);
-
-	DPRINTK("EXIT\n");
-}
-
-/**
- *	ata_eng_timeout - Handle timeout of queued command
- *	@ap: Port on which timed-out command is active
- *
- *	Some part of the kernel (currently, only the SCSI layer)
- *	has noticed that the active command on port @ap has not
- *	completed after a specified length of time.  Handle this
- *	condition by disabling DMA (if necessary) and completing
- *	transactions, with error if necessary.
- *
- *	This also handles the case of the "lost interrupt", where
- *	for some reason (possibly hardware bug, possibly driver bug)
- *	an interrupt was not delivered to the driver, even though the
- *	transaction completed successfully.
- *
- *	LOCKING:
- *	Inherited from SCSI layer (none, can sleep)
- */
-
-void ata_eng_timeout(struct ata_port *ap)
-{
-	DPRINTK("ENTER\n");
-
-	ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
-
-	DPRINTK("EXIT\n");
-}
-
 /**
  *	ata_qc_new - Request an available ATA command, for queueing
  *	@ap: Port associated with device @dev
@@ -5145,7 +5052,6 @@ EXPORT_SYMBOL_GPL(ata_sg_init);
 EXPORT_SYMBOL_GPL(ata_sg_init_one);
 EXPORT_SYMBOL_GPL(__ata_qc_complete);
 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
-EXPORT_SYMBOL_GPL(ata_eng_timeout);
 EXPORT_SYMBOL_GPL(ata_tf_load);
 EXPORT_SYMBOL_GPL(ata_tf_read);
 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
@@ -5185,15 +5091,12 @@ EXPORT_SYMBOL_GPL(ata_busy_sleep);
 EXPORT_SYMBOL_GPL(ata_port_queue_task);
 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
-EXPORT_SYMBOL_GPL(ata_scsi_error);
 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
 EXPORT_SYMBOL_GPL(ata_scsi_release);
 EXPORT_SYMBOL_GPL(ata_host_intr);
 EXPORT_SYMBOL_GPL(ata_id_string);
 EXPORT_SYMBOL_GPL(ata_id_c_string);
 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
-EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
-EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
 
 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
 EXPORT_SYMBOL_GPL(ata_timing_compute);
@@ -5215,3 +5118,8 @@ EXPORT_SYMBOL_GPL(ata_device_suspend);
 EXPORT_SYMBOL_GPL(ata_device_resume);
 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
+
+EXPORT_SYMBOL_GPL(ata_scsi_error);
+EXPORT_SYMBOL_GPL(ata_eng_timeout);
+EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
+EXPORT_SYMBOL_GPL(ata_eh_qc_retry);