libata-link: linkify config/EH related functions

Make the following functions deal with ata_link instead of ata_port.

* ata_set_mode()
* ata_eh_autopsy() and related functions
* ata_eh_report() and related functions
* suspend/resume related functions
* ata_eh_recover() and related functions

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

14 files changed, 120 insertions, 109 deletions

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 44328a16075c..e390ad47c8ef 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -34,7 +34,7 @@
 
 /**
  *	generic_set_mode	-	mode setting
- *	@ap: interface to set up
+ *	@link: link to set up
  *	@unused: returned device on error
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -43,8 +43,9 @@
  *	and respect them.
  */
 
-static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
 {
+	struct ata_port *ap = link->ap;
 	int dma_enabled = 0;
 	struct ata_device *dev;
 
@@ -52,7 +53,7 @@ static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
 	if (ap->ioaddr.bmdma_addr)
 		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 73f66f4e1eeb..944f54457c8f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2171,7 +2171,7 @@ int ata_bus_probe(struct ata_port *ap)
 	}
 
 	/* configure transfer mode */
-	rc = ata_set_mode(ap, &dev);
+	rc = ata_set_mode(&ap->link, &dev);
 	if (rc)
 		goto fail;
 
@@ -2782,7 +2782,7 @@ static int ata_dev_set_mode(struct ata_device *dev)
 
 /**
  *	ata_do_set_mode - Program timings and issue SET FEATURES - XFER
- *	@ap: port on which timings will be programmed
+ *	@link: link on which timings will be programmed
  *	@r_failed_dev: out paramter for failed device
  *
  *	Standard implementation of the function used to tune and set
@@ -2797,9 +2797,9 @@ static int ata_dev_set_mode(struct ata_device *dev)
  *	0 on success, negative errno otherwise
  */
 
-int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	struct ata_device *dev;
 	int rc = 0, used_dma = 0, found = 0;
 
@@ -2877,7 +2877,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 
 /**
  *	ata_set_mode - Program timings and issue SET FEATURES - XFER
- *	@ap: port on which timings will be programmed
+ *	@link: link on which timings will be programmed
  *	@r_failed_dev: out paramter for failed device
  *
  *	Set ATA device disk transfer mode (PIO3, UDMA6, etc.).  If
@@ -2890,12 +2890,14 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
  *	RETURNS:
  *	0 on success, negative errno otherwise
  */
-int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
+	struct ata_port *ap = link->ap;
+
 	/* has private set_mode? */
 	if (ap->ops->set_mode)
-		return ap->ops->set_mode(ap, r_failed_dev);
-	return ata_do_set_mode(ap, r_failed_dev);
+		return ap->ops->set_mode(link, r_failed_dev);
+	return ata_do_set_mode(link, r_failed_dev);
 }
 
 /**
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 0a9ce34a0e64..733aa761f3ee 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1201,7 +1201,7 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
 
 /**
  *	ata_eh_analyze_serror - analyze SError for a failed port
- *	@ap: ATA port to analyze SError for
+ *	@link: ATA link to analyze SError for
  *
  *	Analyze SError if available and further determine cause of
  *	failure.
@@ -1209,9 +1209,9 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_analyze_serror(struct ata_port *ap)
+static void ata_eh_analyze_serror(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 	u32 serror = ehc->i.serror;
 	unsigned int err_mask = 0, action = 0;
 
@@ -1241,7 +1241,7 @@ static void ata_eh_analyze_serror(struct ata_port *ap)
 
 /**
  *	ata_eh_analyze_ncq_error - analyze NCQ error
- *	@ap: ATA port to analyze NCQ error for
+ *	@link: ATA link to analyze NCQ error for
  *
  *	Read log page 10h, determine the offending qc and acquire
  *	error status TF.  For NCQ device errors, all LLDDs have to do
@@ -1251,10 +1251,11 @@ static void ata_eh_analyze_serror(struct ata_port *ap)
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_analyze_ncq_error(struct ata_port *ap)
+static void ata_eh_analyze_ncq_error(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
-	struct ata_device *dev = ap->link.device;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
+	struct ata_device *dev = link->device;
 	struct ata_queued_cmd *qc;
 	struct ata_taskfile tf;
 	int tag, rc;
@@ -1264,7 +1265,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 		return;
 
 	/* is it NCQ device error? */
-	if (!ap->link.sactive || !(ehc->i.err_mask & AC_ERR_DEV))
+	if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
 		return;
 
 	/* has LLDD analyzed already? */
@@ -1281,13 +1282,13 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 	/* okay, this error is ours */
 	rc = ata_eh_read_log_10h(dev, &tag, &tf);
 	if (rc) {
-		ata_port_printk(ap, KERN_ERR, "failed to read log page 10h "
+		ata_link_printk(link, KERN_ERR, "failed to read log page 10h "
 				"(errno=%d)\n", rc);
 		return;
 	}
 
-	if (!(ap->link.sactive & (1 << tag))) {
-		ata_port_printk(ap, KERN_ERR, "log page 10h reported "
+	if (!(link->sactive & (1 << tag))) {
+		ata_link_printk(link, KERN_ERR, "log page 10h reported "
 				"inactive tag %d\n", tag);
 		return;
 	}
@@ -1551,18 +1552,18 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 
 /**
  *	ata_eh_autopsy - analyze error and determine recovery action
- *	@ap: ATA port to perform autopsy on
+ *	@link: ATA link to perform autopsy on
  *
- *	Analyze why @ap failed and determine which recovery action is
- *	needed.  This function also sets more detailed AC_ERR_* values
- *	and fills sense data for ATAPI CHECK SENSE.
+ *	Analyze why @link failed and determine which recovery actions
+ *	are needed.  This function also sets more detailed AC_ERR_*
+ *	values and fills sense data for ATAPI CHECK SENSE.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_autopsy(struct ata_port *ap)
+static void ata_eh_autopsy(struct ata_link *link)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int all_err_mask = 0;
 	int tag, is_io = 0;
@@ -1578,7 +1579,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	rc = sata_scr_read(link, SCR_ERROR, &serror);
 	if (rc == 0) {
 		ehc->i.serror |= serror;
-		ata_eh_analyze_serror(ap);
+		ata_eh_analyze_serror(link);
 	} else if (rc != -EOPNOTSUPP) {
 		/* SError read failed, force hardreset and probing */
 		ata_ehi_schedule_probe(&ehc->i);
@@ -1587,7 +1588,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	}
 
 	/* analyze NCQ failure */
-	ata_eh_analyze_ncq_error(ap);
+	ata_eh_analyze_ncq_error(link);
 
 	/* any real error trumps AC_ERR_OTHER */
 	if (ehc->i.err_mask & ~AC_ERR_OTHER)
@@ -1598,7 +1599,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED))
+		if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link)
 			continue;
 
 		/* inherit upper level err_mask */
@@ -1653,16 +1654,17 @@ static void ata_eh_autopsy(struct ata_port *ap)
 
 /**
  *	ata_eh_report - report error handling to user
- *	@ap: ATA port EH is going on
+ *	@link: ATA link EH is going on
  *
  *	Report EH to user.
  *
  *	LOCKING:
  *	None.
  */
-static void ata_eh_report(struct ata_port *ap)
+static void ata_eh_report(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
 	const char *frozen, *desc;
 	int tag, nr_failed = 0;
 
@@ -1673,7 +1675,7 @@ static void ata_eh_report(struct ata_port *ap)
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED))
+		if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link)
 			continue;
 		if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask)
 			continue;
@@ -1691,17 +1693,17 @@ static void ata_eh_report(struct ata_port *ap)
 	if (ehc->i.dev) {
 		ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x "
 			       "SAct 0x%x SErr 0x%x action 0x%x%s\n",
-			       ehc->i.err_mask, ap->link.sactive,
+			       ehc->i.err_mask, link->sactive,
 			       ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
 			ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc);
 	} else {
-		ata_port_printk(ap, KERN_ERR, "exception Emask 0x%x "
+		ata_link_printk(link, KERN_ERR, "exception Emask 0x%x "
 				"SAct 0x%x SErr 0x%x action 0x%x%s\n",
-				ehc->i.err_mask, ap->link.sactive,
+				ehc->i.err_mask, link->sactive,
 				ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
-			ata_port_printk(ap, KERN_ERR, "%s\n", desc);
+			ata_link_printk(link, KERN_ERR, "%s\n", desc);
 	}
 
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
@@ -1714,7 +1716,8 @@ static void ata_eh_report(struct ata_port *ap)
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 		struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf;
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED) || !qc->err_mask)
+		if (!(qc->flags & ATA_QCFLAG_FAILED) ||
+		    qc->dev->link != link || !qc->err_mask)
 			continue;
 
 		ata_dev_printk(qc->dev, KERN_ERR,
@@ -1936,10 +1939,11 @@ static int ata_eh_reset(struct ata_link *link, int classify,
 	return rc;
 }
 
-static int ata_eh_revalidate_and_attach(struct ata_port *ap,
+static int ata_eh_revalidate_and_attach(struct ata_link *link,
 					struct ata_device **r_failed_dev)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 	unsigned int new_mask = 0;
 	unsigned long flags;
@@ -1951,7 +1955,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	 * be done backwards such that PDIAG- is released by the slave
 	 * device before the master device is identified.
 	 */
-	ata_link_for_each_dev_reverse(dev, &ap->link) {
+	ata_link_for_each_dev_reverse(dev, link) {
 		unsigned int action = ata_eh_dev_action(dev);
 		unsigned int readid_flags = 0;
 
@@ -1959,17 +1963,17 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 			readid_flags |= ATA_READID_POSTRESET;
 
 		if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) {
-			if (ata_link_offline(&ap->link)) {
+			if (ata_link_offline(link)) {
 				rc = -EIO;
 				goto err;
 			}
 
-			ata_eh_about_to_do(&ap->link, dev, ATA_EH_REVALIDATE);
+			ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE);
 			rc = ata_dev_revalidate(dev, readid_flags);
 			if (rc)
 				goto err;
 
-			ata_eh_done(&ap->link, dev, ATA_EH_REVALIDATE);
+			ata_eh_done(link, dev, ATA_EH_REVALIDATE);
 
 			/* Configuration may have changed, reconfigure
 			 * transfer mode.
@@ -2011,7 +2015,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	/* Configure new devices forward such that user doesn't see
 	 * device detection messages backwards.
 	 */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (!(new_mask & (1 << dev->devno)))
 			continue;
 
@@ -2037,40 +2041,40 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	return rc;
 }
 
-static int ata_port_nr_enabled(struct ata_port *ap)
+static int ata_link_nr_enabled(struct ata_link *link)
 {
 	struct ata_device *dev;
 	int cnt = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		if (ata_dev_enabled(dev))
 			cnt++;
 	return cnt;
 }
 
-static int ata_port_nr_vacant(struct ata_port *ap)
+static int ata_link_nr_vacant(struct ata_link *link)
 {
 	struct ata_device *dev;
 	int cnt = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		if (dev->class == ATA_DEV_UNKNOWN)
 			cnt++;
 	return cnt;
 }
 
-static int ata_eh_skip_recovery(struct ata_port *ap)
+static int ata_eh_skip_recovery(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 
 	/* thaw frozen port, resume link and recover failed devices */
-	if ((ap->pflags & ATA_PFLAG_FROZEN) ||
-	    (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_port_nr_enabled(ap))
+	if ((link->ap->pflags & ATA_PFLAG_FROZEN) ||
+	    (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_link_nr_enabled(link))
 		return 0;
 
 	/* skip if class codes for all vacant slots are ATA_DEV_NONE */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (dev->class == ATA_DEV_UNKNOWN &&
 		    ehc->classes[dev->devno] != ATA_DEV_NONE)
 			return 0;
@@ -2154,14 +2158,15 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 			  ata_postreset_fn_t postreset)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 	int rc;
 
 	DPRINTK("ENTER\n");
 
 	/* prep for recovery */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
 		/* collect port action mask recorded in dev actions */
@@ -2191,20 +2196,20 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		goto out;
 
 	/* skip EH if possible. */
-	if (ata_eh_skip_recovery(ap))
+	if (ata_eh_skip_recovery(link))
 		ehc->i.action = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
 
 	/* reset */
 	if (ehc->i.action & ATA_EH_RESET_MASK) {
 		ata_eh_freeze_port(ap);
 
-		rc = ata_eh_reset(&ap->link, ata_port_nr_vacant(ap), prereset,
+		rc = ata_eh_reset(link, ata_link_nr_vacant(link), prereset,
 				  softreset, hardreset, postreset);
 		if (rc) {
-			ata_port_printk(ap, KERN_ERR,
+			ata_link_printk(link, KERN_ERR,
 					"reset failed, giving up\n");
 			goto out;
 		}
@@ -2213,13 +2218,13 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	}
 
 	/* revalidate existing devices and attach new ones */
-	rc = ata_eh_revalidate_and_attach(ap, &dev);
+	rc = ata_eh_revalidate_and_attach(link, &dev);
 	if (rc)
 		goto dev_fail;
 
 	/* configure transfer mode if necessary */
 	if (ehc->i.flags & ATA_EHI_SETMODE) {
-		rc = ata_set_mode(ap, &dev);
+		rc = ata_set_mode(link, &dev);
 		if (rc)
 			goto dev_fail;
 		ehc->i.flags &= ~ATA_EHI_SETMODE;
@@ -2230,8 +2235,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
  dev_fail:
 	ata_eh_handle_dev_fail(dev, rc);
 
-	if (ata_port_nr_enabled(ap)) {
-		ata_port_printk(ap, KERN_WARNING, "failed to recover some "
+	if (ata_link_nr_enabled(link)) {
+		ata_link_printk(link, KERN_WARNING, "failed to recover some "
 				"devices, retrying in 5 secs\n");
 		ssleep(5);
 	} else {
@@ -2243,7 +2248,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
  out:
 	if (rc) {
-		ata_link_for_each_dev(dev, &ap->link);
+		ata_link_for_each_dev(dev, link);
 			ata_dev_disable(dev);
 	}
 
@@ -2310,8 +2315,8 @@ void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 	       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 	       ata_postreset_fn_t postreset)
 {
-	ata_eh_autopsy(ap);
-	ata_eh_report(ap);
+	ata_eh_autopsy(&ap->link);
+	ata_eh_report(&ap->link);
 	ata_eh_recover(ap, prereset, softreset, hardreset, postreset);
 	ata_eh_finish(ap);
 }
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 700843a9f30a..6d85edefa7c6 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -81,7 +81,7 @@ extern int ata_dev_configure(struct ata_device *dev);
 extern int sata_down_spd_limit(struct ata_link *link);
 extern int sata_set_spd_needed(struct ata_link *link);
 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
-extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
+extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 extern void ata_sg_clean(struct ata_queued_cmd *qc);
 extern void ata_qc_free(struct ata_queued_cmd *qc);
 extern void ata_qc_issue(struct ata_queued_cmd *qc);
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 088eb1d23761..f32d9b7ab496 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -450,7 +450,7 @@ static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
 
 /**
  *	it821x_smart_set_mode	-	mode setting
- *	@ap: interface to set up
+ *	@link: interface to set up
  *	@unused: device that failed (error only)
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -459,11 +459,11 @@ static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
  *	and respect them.
  */
 
-static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int it821x_smart_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 7db315a9baad..6bf1709508ab 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -26,11 +26,11 @@
 #define DRV_NAME	"pata_ixp4xx_cf"
 #define DRV_VERSION	"0.2"
 
-static int ixp4xx_set_mode(struct ata_port *ap, struct ata_device **error)
+static int ixp4xx_set_mode(struct ata_link *link, struct ata_device **error)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 9d92843b033d..cfb2bc86a1d1 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -96,7 +96,7 @@ static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
 
 /**
  *	legacy_set_mode		-	mode setting
- *	@ap: IDE interface
+ *	@link: IDE link
  *	@unused: Device that failed when error is returned
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -107,11 +107,11 @@ static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
  *	expand on this as per hdparm in the base kernel.
  */
 
-static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int legacy_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 39fcba800077..09ef725afd90 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -324,25 +324,26 @@ static u8 optidma_make_bits43(struct ata_device *adev)
 
 /**
  *	optidma_set_mode	-	mode setup
- *	@ap: port to set up
+ *	@link: link to set up
  *
  *	Use the standard setup to tune the chipset and then finalise the
  *	configuration by writing the nibble of extra bits of data into
  *	the chip.
  */
 
-static int optidma_set_mode(struct ata_port *ap, struct ata_device **r_failed)
+static int optidma_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
+	struct ata_port *ap = link->ap;
 	u8 r;
 	int nybble = 4 * ap->port_no;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
-	int rc  = ata_do_set_mode(ap, r_failed);
+	int rc  = ata_do_set_mode(link, r_failed);
 	if (rc == 0) {
 		pci_read_config_byte(pdev, 0x43, &r);
 
 		r &= (0x0F << nybble);
-		r |= (optidma_make_bits43(&ap->link.device[0]) +
-		     (optidma_make_bits43(&ap->link.device[0]) << 2)) << nybble;
+		r |= (optidma_make_bits43(&link->device[0]) +
+		     (optidma_make_bits43(&link->device[0]) << 2)) << nybble;
 		pci_write_config_byte(pdev, 0x43, r);
 	}
 	return rc;
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 890f649ddcce..9bfe12ac851a 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -56,7 +56,7 @@ struct ata_pcmcia_info {
 
 /**
  *	pcmcia_set_mode	-	PCMCIA specific mode setup
- *	@ap: Port
+ *	@link: link
  *	@r_failed_dev: Return pointer for failed device
  *
  *	Perform the tuning and setup of the devices and timings, which
@@ -65,13 +65,13 @@ struct ata_pcmcia_info {
  *	decode, which alas is embarrassingly common in the PC world
  */
 
-static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+static int pcmcia_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
-	struct ata_device *master = &ap->link.device[0];
-	struct ata_device *slave = &ap->link.device[1];
+	struct ata_device *master = &link->device[0];
+	struct ata_device *slave = &link->device[1];
 
 	if (!ata_dev_enabled(master) || !ata_dev_enabled(slave))
-		return ata_do_set_mode(ap, r_failed_dev);
+		return ata_do_set_mode(link, r_failed_dev);
 
 	if (memcmp(master->id + ATA_ID_FW_REV,  slave->id + ATA_ID_FW_REV,
 			   ATA_ID_FW_REV_LEN + ATA_ID_PROD_LEN) == 0)
@@ -84,7 +84,7 @@ static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev
 			ata_dev_disable(slave);
 		}
 	}
-	return ata_do_set_mode(ap, r_failed_dev);
+	return ata_do_set_mode(link, r_failed_dev);
 }
 
 static struct scsi_host_template pcmcia_sht = {
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index ba39efbe5405..db069d7515bc 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -69,7 +69,7 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
 static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
 static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);
 static int pdc2027x_cable_detect(struct ata_port *ap);
-static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed);
+static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed);
 
 /*
  * ATA Timing Tables based on 133MHz controller clock.
@@ -470,23 +470,24 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 
 /**
  *	pdc2027x_set_mode - Set the timing registers back to correct values.
- *	@ap: Port to configure
+ *	@link: link to configure
  *	@r_failed: Returned device for failure
  *
  *	The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
  *	automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
  *	This function overwrites the possibly incorrect values set by the hardware to be correct.
  */
-static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed)
+static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
+	struct ata_port *ap = link->ap;
 	struct ata_device *dev;
 	int rc;
 
-	rc = ata_do_set_mode(ap, r_failed);
+	rc = ata_do_set_mode(link, r_failed);
 	if (rc < 0)
 		return rc;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 
 			pdc2027x_set_piomode(ap, dev);
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index ee1605bfc29f..37e5158391da 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -30,11 +30,11 @@ static int pio_mask = 1;
  * Provide our own set_mode() as we don't want to change anything that has
  * already been configured..
  */
-static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 300b3d5de81e..de3698cf3b8c 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -26,7 +26,7 @@
 
 /**
  *	rz1000_set_mode		-	mode setting function
- *	@ap: ATA interface
+ *	@link: ATA link
  *	@unused: returned device on set_mode failure
  *
  *	Use a non standard set_mode function. We don't want to be tuned. We
@@ -34,11 +34,11 @@
  *	whacked out.
  */
 
-static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 064a3b505609..304c19b9b0f2 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -297,15 +297,16 @@ static void adma_thaw(struct ata_port *ap)
 	adma_reinit_engine(ap);
 }
 
-static int adma_prereset(struct ata_port *ap, unsigned long deadline)
+static int adma_prereset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct adma_port_priv *pp = ap->private_data;
 
 	if (pp->state != adma_state_idle) /* healthy paranoia */
 		pp->state = adma_state_mmio;
 	adma_reinit_engine(ap);
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void adma_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 4c9295a49a49..5cd3eb83e4ad 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -117,7 +117,7 @@ static int sil_pci_device_resume(struct pci_dev *pdev);
 static void sil_dev_config(struct ata_device *dev);
 static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
 static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
-static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed);
+static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
 static void sil_freeze(struct ata_port *ap);
 static void sil_thaw(struct ata_port *ap);
 
@@ -290,27 +290,27 @@ static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
 
 /**
  *	sil_set_mode		-	wrap set_mode functions
- *	@ap: port to set up
+ *	@link: link to set up
  *	@r_failed: returned device when we fail
  *
  *	Wrap the libata method for device setup as after the setup we need
  *	to inspect the results and do some configuration work
  */
 
-static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed)
+static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
-	struct ata_host *host = ap->host;
-	struct ata_device *dev;
-	void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
+	struct ata_port *ap = link->ap;
+	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 	void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
+	struct ata_device *dev;
 	u32 tmp, dev_mode[2] = { };
 	int rc;
 
-	rc = ata_do_set_mode(ap, r_failed);
+	rc = ata_do_set_mode(link, r_failed);
 	if (rc)
 		return rc;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (!ata_dev_enabled(dev))
 			dev_mode[dev->devno] = 0;	/* PIO0/1/2 */
 		else if (dev->flags & ATA_DFLAG_PIO)