[PATCH] libata: fix eh_skip_recovery condition

* (ata_dev_absent() || ata_dev_ready()) test doesn't indicate
  SUSPENDED state properly.  Fix it.

* Link resuming resets shouldn't be skipped.  Don't skip recovery on
  EHI_RESUME_LINK.  This doesn't matter for host ports as EHI_RESUME
  always coincides with EHI_HOTPLUGGED which makes attached disabled
  devices vacant.  However, PMP reset causes non-hotplug link-resuming
  resets which shouldn't be skipped.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 36a801c83325..1dcb2c13ffa9 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -1843,15 +1843,16 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
         for (i = 0; i < ata_port_max_devices(ap); i++) {
                 struct ata_device *dev = &ap->device[i];
 
-                if (ata_dev_absent(dev) || ata_dev_ready(dev))
+                if (!(dev->flags & ATA_DFLAG_SUSPENDED))
                         break;
         }
 
         if (i == ata_port_max_devices(ap))
                 return 1;
 
-        /* always thaw frozen port and recover failed devices */
-        if (ap->pflags & ATA_PFLAG_FROZEN || ata_port_nr_enabled(ap))
+        /* 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))
                 return 0;
 
         /* skip if class codes for all vacant slots are ATA_DEV_NONE */