scsi: sas: move scsi_remove_host call into sas_remove_host

Move scsi_remove_host call into sas_remove_host and remove it from SAS
HBA drivers, so we don't mess up the ordering. This solves an issue with
double deleting sysfs entries that was introduced by the change of sysfs
behaviour from commit bcdde7e221a8 ("sysfs: make __sysfs_remove_dir()
recursive").

[mkp: addressed checkpatch complaints]

Signed-off-by: Johannes Thumshirn <[e-mail]>
Suggested-by: Christoph Hellwig <[e-mail]>
Cc: Hannes Reinecke <[e-mail]>
Cc: James Bottomley <[e-mail]>
Cc: Jinpu Wang <[e-mail]>
Cc: John Garry <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Jinpu Wang <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/aic94xx/aic94xx_init.c

···
 {
 	int err;
 
-	scsi_remove_host(asd_ha->sas_ha.core.shost);
 	err = sas_unregister_ha(&asd_ha->sas_ha);
 
 	sas_remove_host(asd_ha->sas_ha.core.shost);

drivers/scsi/hisi_sas/hisi_sas_main.c

···
 	struct hisi_hba *hisi_hba = sha->lldd_ha;
 	struct Scsi_Host *shost = sha->core.shost;
 
-	scsi_remove_host(sha->core.shost);
 	sas_unregister_ha(sha);
 	sas_remove_host(sha->core.shost);
 

drivers/scsi/isci/init.c

···
 		return;
 
 	shost = to_shost(isci_host);
-	scsi_remove_host(shost);
 	sas_unregister_ha(&isci_host->sas_ha);
 
 	sas_remove_host(shost);

drivers/scsi/mpt3sas/mpt3sas_scsih.c

···
 	}
 
 	sas_remove_host(shost);
-	scsi_remove_host(shost);
 	mpt3sas_base_detach(ioc);
 	spin_lock(&gioc_lock);
 	list_del(&ioc->list);

drivers/scsi/mvsas/mv_init.c

···
 	tasklet_kill(&((struct mvs_prv_info *)sha->lldd_ha)->mv_tasklet);
 #endif
 
-	scsi_remove_host(mvi->shost);
 	sas_unregister_ha(sha);
 	sas_remove_host(mvi->shost);
 

drivers/scsi/pm8001/pm8001_init.c

···
 	struct pm8001_hba_info *pm8001_ha;
 	int i, j;
 	pm8001_ha = sha->lldd_ha;
-	scsi_remove_host(pm8001_ha->shost);
 	sas_unregister_ha(sha);
 	sas_remove_host(pm8001_ha->shost);
 	list_del(&pm8001_ha->list);

drivers/scsi/scsi_transport_sas.c

···
  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
  * @shost:	Scsi Host that is torn down
  *
- * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
- * Must be called just before scsi_remove_host for SAS HBAs.
+ * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
+ * Scsi_Host as well.
+ *
+ * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
+ * already removed.
  */
 void sas_remove_host(struct Scsi_Host *shost)
 {
 	sas_remove_children(&shost->shost_gendev);
+	scsi_remove_host(shost);
 }
 EXPORT_SYMBOL(sas_remove_host);