[SCSI] libsas: cleanup spurious calls to scsi_schedule_eh

eh is woken up automatically by the presence of failed commands,
scsi_schedule_eh is reserved for cases where there are no failed
commands.  This guarantees that host_eh_sceduled is only incremented
when an explicit eh request is made.
Reviewed-by: NJacek Danecki <jacek.danecki@intel.com>
Signed-off-by: NMaciej Trela <maciej.trela@intel.com>
[fixed spurious delete of sas_ata_task_abort]
Signed-off-by: NArtur Wojcik <artur.wojcik@intel.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

drivers/scsi/libsas/sas_ata.c

@@ -618,7 +618,6 @@ void sas_ata_task_abort(struct sas_task *task)
 		spin_lock_irqsave(q->queue_lock, flags);
 		blk_abort_request(qc->scsicmd->request);
 		spin_unlock_irqrestore(q->queue_lock, flags);
-		scsi_schedule_eh(qc->scsicmd->device->host);
 		return;
 	}
 

drivers/scsi/libsas/sas_scsi_host.c

@@ -1018,7 +1018,6 @@ void sas_task_abort(struct sas_task *task)
 		spin_lock_irqsave(q->queue_lock, flags);
 		blk_abort_request(sc->request);
 		spin_unlock_irqrestore(q->queue_lock, flags);
-		scsi_schedule_eh(sc->device->host);
 	}
 }