Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

1 files changed, 11 insertions, 10 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8077bdf5d30d..32da9a93ce44 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -610,9 +610,6 @@ void ata_scsi_error(struct Scsi_Host *host)
 				if (ata_ncq_enabled(dev))
 					ehc->saved_ncq_enabled |= 1 << devno;
 			}
-
-			/* set last reset timestamp to some time in the past */
-			ehc->last_reset = jiffies - 60 * HZ;
 		}
 
 		ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
@@ -2281,17 +2278,21 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	if (link->flags & ATA_LFLAG_NO_SRST)
 		softreset = NULL;
 
-	now = jiffies;
-	deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN);
-	if (time_before(now, deadline))
-		schedule_timeout_uninterruptible(deadline - now);
+	/* make sure each reset attemp is at least COOL_DOWN apart */
+	if (ehc->i.flags & ATA_EHI_DID_RESET) {
+		now = jiffies;
+		WARN_ON(time_after(ehc->last_reset, now));
+		deadline = ata_deadline(ehc->last_reset,
+					ATA_EH_RESET_COOL_DOWN);
+		if (time_before(now, deadline))
+			schedule_timeout_uninterruptible(deadline - now);
+	}
 
 	spin_lock_irqsave(ap->lock, flags);
 	ap->pflags |= ATA_PFLAG_RESETTING;
 	spin_unlock_irqrestore(ap->lock, flags);
 
 	ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
-	ehc->last_reset = jiffies;
 
 	ata_link_for_each_dev(dev, link) {
 		/* If we issue an SRST then an ATA drive (not ATAPI)
@@ -2379,7 +2380,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	/*
 	 * Perform reset
 	 */
-	ehc->last_reset = jiffies;
 	if (ata_is_host_link(link))
 		ata_eh_freeze_port(ap);
 
@@ -2391,6 +2391,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 					reset == softreset ? "soft" : "hard");
 
 		/* mark that this EH session started with reset */
+		ehc->last_reset = jiffies;
 		if (reset == hardreset)
 			ehc->i.flags |= ATA_EHI_DID_HARDRESET;
 		else
@@ -2535,7 +2536,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	ata_eh_done(link, NULL, ATA_EH_RESET);
 	if (slave)
 		ata_eh_done(slave, NULL, ATA_EH_RESET);
-	ehc->last_reset = jiffies;
+	ehc->last_reset = jiffies;	/* update to completion time */
 	ehc->i.action |= ATA_EH_REVALIDATE;
 
 	rc = 0;