1 files changed, 35 insertions, 64 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a5830329eda..f7cae640015 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1079,16 +1079,9 @@ void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 
 	spin_lock_irqsave(ap->lock, flags);
 
-	/* Reset is represented by combination of actions and EHI
-	 * flags.  Suck in all related bits before clearing eh_info to
-	 * avoid losing requested action.
-	 */
-	if (action & ATA_EH_RESET_MASK) {
-		ehc->i.action |= ehi->action & ATA_EH_RESET_MASK;
+	/* suck in and clear reset modifier */
+	if (action & ATA_EH_RESET) {
 		ehc->i.flags |= ehi->flags & ATA_EHI_RESET_MODIFIER_MASK;
-
-		/* make sure all reset actions are cleared & clear EHI flags */
-		action |= ATA_EH_RESET_MASK;
 		ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
@@ -1117,11 +1110,9 @@ void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 {
 	struct ata_eh_context *ehc = &link->eh_context;
 
-	/* if reset is complete, clear all reset actions & reset modifier */
-	if (action & ATA_EH_RESET_MASK) {
-		action |= ATA_EH_RESET_MASK;
+	/* if reset is complete, clear reset modifier */
+	if (action & ATA_EH_RESET)
 		ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
-	}
 
 	ata_eh_clear_action(link, dev, &ehc->i, action);
 }
@@ -1329,20 +1320,20 @@ static void ata_eh_analyze_serror(struct ata_link *link)
 
 	if (serror & SERR_PERSISTENT) {
 		err_mask |= AC_ERR_ATA_BUS;
-		action |= ATA_EH_HARDRESET;
+		action |= ATA_EH_RESET;
 	}
 	if (serror &
 	    (SERR_DATA_RECOVERED | SERR_COMM_RECOVERED | SERR_DATA)) {
 		err_mask |= AC_ERR_ATA_BUS;
-		action |= ATA_EH_SOFTRESET;
+		action |= ATA_EH_RESET;
 	}
 	if (serror & SERR_PROTOCOL) {
 		err_mask |= AC_ERR_HSM;
-		action |= ATA_EH_SOFTRESET;
+		action |= ATA_EH_RESET;
 	}
 	if (serror & SERR_INTERNAL) {
 		err_mask |= AC_ERR_SYSTEM;
-		action |= ATA_EH_HARDRESET;
+		action |= ATA_EH_RESET;
 	}
 
 	/* Determine whether a hotplug event has occurred.  Both
@@ -1448,7 +1439,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
 
 	if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) {
 		qc->err_mask |= AC_ERR_HSM;
-		return ATA_EH_SOFTRESET;
+		return ATA_EH_RESET;
 	}
 
 	if (stat & (ATA_ERR | ATA_DF))
@@ -1484,7 +1475,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
 	}
 
 	if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS))
-		action |= ATA_EH_SOFTRESET;
+		action |= ATA_EH_RESET;
 
 	return action;
 }
@@ -1685,7 +1676,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev,
 	if (verdict & ATA_EH_SPDN_SPEED_DOWN) {
 		/* speed down SATA link speed if possible */
 		if (sata_down_spd_limit(link) == 0) {
-			action |= ATA_EH_HARDRESET;
+			action |= ATA_EH_RESET;
 			goto done;
 		}
 
@@ -1705,7 +1696,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev,
 			dev->spdn_cnt++;
 
 			if (ata_down_xfermask_limit(dev, sel) == 0) {
-				action |= ATA_EH_SOFTRESET;
+				action |= ATA_EH_RESET;
 				goto done;
 			}
 		}
@@ -1719,7 +1710,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev,
 	    (dev->xfer_shift != ATA_SHIFT_PIO)) {
 		if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) {
 			dev->spdn_cnt = 0;
-			action |= ATA_EH_SOFTRESET;
+			action |= ATA_EH_RESET;
 			goto done;
 		}
 	}
@@ -1764,9 +1755,9 @@ static void ata_eh_link_autopsy(struct ata_link *link)
 		ehc->i.serror |= serror;
 		ata_eh_analyze_serror(link);
 	} else if (rc != -EOPNOTSUPP) {
-		/* SError read failed, force hardreset and probing */
+		/* SError read failed, force reset and probing */
 		ata_ehi_schedule_probe(&ehc->i);
-		ehc->i.action |= ATA_EH_HARDRESET;
+		ehc->i.action |= ATA_EH_RESET;
 		ehc->i.err_mask |= AC_ERR_OTHER;
 	}
 
@@ -1814,7 +1805,7 @@ static void ata_eh_link_autopsy(struct ata_link *link)
 	/* enforce default EH actions */
 	if (ap->pflags & ATA_PFLAG_FROZEN ||
 	    all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT))
-		ehc->i.action |= ATA_EH_SOFTRESET;
+		ehc->i.action |= ATA_EH_RESET;
 	else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) ||
 		 (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV)))
 		ehc->i.action |= ATA_EH_REVALIDATE;
@@ -2118,7 +2109,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	int try = 0;
 	struct ata_device *dev;
 	unsigned long deadline, now;
-	unsigned int tmp_action;
 	ata_reset_fn_t reset;
 	unsigned long flags;
 	u32 sstatus;
@@ -2129,7 +2119,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	ap->pflags |= ATA_PFLAG_RESETTING;
 	spin_unlock_irqrestore(ap->lock, flags);
 
-	ata_eh_about_to_do(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
+	ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
 
 	ata_link_for_each_dev(dev, link) {
 		/* If we issue an SRST then an ATA drive (not ATAPI)
@@ -2159,17 +2149,15 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		goto done;
 	}
 
-	/* Determine which reset to use and record in ehc->i.action.
-	 * prereset() may examine and modify it.
-	 */
-	if (softreset && (!hardreset || (!(lflags & ATA_LFLAG_NO_SRST) &&
-					 !sata_set_spd_needed(link) &&
-					 !(ehc->i.action & ATA_EH_HARDRESET))))
-		tmp_action = ATA_EH_SOFTRESET;
-	else
-		tmp_action = ATA_EH_HARDRESET;
-
-	ehc->i.action = (ehc->i.action & ~ATA_EH_RESET_MASK) | tmp_action;
+	/* prefer hardreset */
+	ehc->i.action &= ~ATA_EH_RESET;
+	if (hardreset) {
+		reset = hardreset;
+		ehc->i.action = ATA_EH_HARDRESET;
+	} else {
+		reset = softreset;
+		ehc->i.action = ATA_EH_SOFTRESET;
+	}
 
 	if (prereset) {
 		rc = prereset(link, jiffies + ATA_EH_PRERESET_TIMEOUT);
@@ -2177,7 +2165,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 			if (rc == -ENOENT) {
 				ata_link_printk(link, KERN_DEBUG,
 						"port disabled. ignoring.\n");
-				ehc->i.action &= ~ATA_EH_RESET_MASK;
+				ehc->i.action &= ~ATA_EH_RESET;
 
 				ata_link_for_each_dev(dev, link)
 					classes[dev->devno] = ATA_DEV_NONE;
@@ -2190,12 +2178,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		}
 	}
 
-	/* prereset() might have modified ehc->i.action */
-	if (ehc->i.action & ATA_EH_HARDRESET)
-		reset = hardreset;
-	else if (ehc->i.action & ATA_EH_SOFTRESET)
-		reset = softreset;
-	else {
+	/* prereset() might have cleared ATA_EH_RESET */
+	if (!(ehc->i.action & ATA_EH_RESET)) {
 		/* prereset told us not to reset, bang classes and return */
 		ata_link_for_each_dev(dev, link)
 			classes[dev->devno] = ATA_DEV_NONE;
@@ -2203,14 +2187,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		goto out;
 	}
 
-	/* did prereset() screw up?  if so, fix up to avoid oopsing */
-	if (!reset) {
-		if (softreset)
-			reset = softreset;
-		else
-			reset = hardreset;
-	}
-
  retry:
 	deadline = jiffies + ata_eh_reset_timeouts[try++];
 
@@ -2240,7 +2216,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 			goto fail;
 		}
 
-		ata_eh_about_to_do(link, NULL, ATA_EH_RESET_MASK);
+		ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
 		rc = ata_do_reset(link, reset, classes, deadline);
 	}
 
@@ -2290,7 +2266,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		postreset(link, classes);
 
 	/* reset successful, schedule revalidation */
-	ata_eh_done(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
+	ata_eh_done(link, NULL, ATA_EH_RESET);
 	ehc->i.action |= ATA_EH_REVALIDATE;
 
 	rc = 0;
@@ -2548,7 +2524,7 @@ static int ata_eh_schedule_probe(struct ata_device *dev)
 	ata_eh_detach_dev(dev);
 	ata_dev_init(dev);
 	ehc->did_probe_mask |= (1 << dev->devno);
-	ehc->i.action |= ATA_EH_SOFTRESET;
+	ehc->i.action |= ATA_EH_RESET;
 	ehc->saved_xfer_mode[dev->devno] = 0;
 	ehc->saved_ncq_enabled &= ~(1 << dev->devno);
 
@@ -2592,12 +2568,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 
 		return 1;
 	} else {
-		/* soft didn't work?  be haaaaard */
-		if (ehc->i.flags & ATA_EHI_DID_RESET)
-			ehc->i.action |= ATA_EH_HARDRESET;
-		else
-			ehc->i.action |= ATA_EH_SOFTRESET;
-
+		ehc->i.action |= ATA_EH_RESET;
 		return 0;
 	}
 }
@@ -2690,7 +2661,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			ehc->i.action = 0;
 
 		/* do we need to reset? */
-		if (ehc->i.action & ATA_EH_RESET_MASK)
+		if (ehc->i.action & ATA_EH_RESET)
 			reset = 1;
 
 		ata_link_for_each_dev(dev, link)
@@ -2708,7 +2679,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		ata_port_for_each_link(link, ap) {
 			struct ata_eh_context *ehc = &link->eh_context;
 
-			if (!(ehc->i.action & ATA_EH_RESET_MASK))
+			if (!(ehc->i.action & ATA_EH_RESET))
 				continue;
 
 			rc = ata_eh_reset(link, ata_link_nr_vacant(link),