Merge commit 'v2.6.28-rc9' into next

[pandora-kernel.git] / drivers / ata / libata-eh.c

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a93247c..32da9a9 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -603,13 +603,13 @@ void ata_scsi_error(struct Scsi_Host *host)
                        ata_link_for_each_dev(dev, link) {
                                int devno = dev->devno;
 
+                               if (!ata_dev_enabled(dev))
+                                       continue;
+
                                ehc->saved_xfer_mode[devno] = dev->xfer_mode;
                                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;
@@ -1161,6 +1161,7 @@ void ata_eh_detach_dev(struct ata_device *dev)
 {
        struct ata_link *link = dev->link;
        struct ata_port *ap = link->ap;
+       struct ata_eh_context *ehc = &link->eh_context;
        unsigned long flags;
 
        ata_dev_disable(dev);
@@ -1174,9 +1175,11 @@ void ata_eh_detach_dev(struct ata_device *dev)
                ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG;
        }
 
-       /* clear per-dev EH actions */
+       /* clear per-dev EH info */
        ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK);
        ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK);
+       ehc->saved_xfer_mode[dev->devno] = 0;
+       ehc->saved_ncq_enabled &= ~(1 << dev->devno);
 
        spin_unlock_irqrestore(ap->lock, flags);
 }
@@ -1206,7 +1209,10 @@ void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 
        ata_eh_clear_action(link, dev, ehi, action);
 
-       if (!(ehc->i.flags & ATA_EHI_QUIET))
+       /* About to take EH action, set RECOVERED.  Ignore actions on
+        * slave links as master will do them again.
+        */
+       if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link)
                ap->pflags |= ATA_PFLAG_RECOVERED;
 
        spin_unlock_irqrestore(ap->lock, flags);
@@ -2010,8 +2016,13 @@ void ata_eh_autopsy(struct ata_port *ap)
                struct ata_eh_context *mehc = &ap->link.eh_context;
                struct ata_eh_context *sehc = &ap->slave_link->eh_context;
 
+               /* transfer control flags from master to slave */
+               sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK;
+
+               /* perform autopsy on the slave link */
                ata_eh_link_autopsy(ap->slave_link);
 
+               /* transfer actions from slave to master and clear slave */
                ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS);
                mehc->i.action          |= sehc->i.action;
                mehc->i.dev_action[1]   |= sehc->i.dev_action[1];
@@ -2267,17 +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)
@@ -2365,7 +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);
 
@@ -2377,6 +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
@@ -2447,14 +2462,14 @@ int ata_eh_reset(struct ata_link *link, int classify,
                dev->pio_mode = XFER_PIO_0;
                dev->flags &= ~ATA_DFLAG_SLEEPING;
 
-               if (ata_phys_link_offline(ata_dev_phys_link(dev)))
-                       continue;
-
-               /* apply class override */
-               if (lflags & ATA_LFLAG_ASSUME_ATA)
-                       classes[dev->devno] = ATA_DEV_ATA;
-               else if (lflags & ATA_LFLAG_ASSUME_SEMB)
-                       classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */
+               if (!ata_phys_link_offline(ata_dev_phys_link(dev))) {
+                       /* apply class override */
+                       if (lflags & ATA_LFLAG_ASSUME_ATA)
+                               classes[dev->devno] = ATA_DEV_ATA;
+                       else if (lflags & ATA_LFLAG_ASSUME_SEMB)
+                               classes[dev->devno] = ATA_DEV_SEMB_UNSUP;
+               } else
+                       classes[dev->devno] = ATA_DEV_NONE;
        }
 
        /* record current link speed */
@@ -2521,7 +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;
@@ -2779,6 +2794,9 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 
        /* if data transfer is verified, clear DUBIOUS_XFER on ering top */
        ata_link_for_each_dev(dev, link) {
+               if (!ata_dev_enabled(dev))
+                       continue;
+
                if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) {
                        struct ata_ering_entry *ent;
 
@@ -2800,6 +2818,9 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
                u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno];
                u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno));
 
+               if (!ata_dev_enabled(dev))
+                       continue;
+
                if (dev->xfer_mode != saved_xfer_mode ||
                    ata_ncq_enabled(dev) != saved_ncq)
                        dev->flags |= ATA_DFLAG_DUBIOUS_XFER;