From: Hannes Reinecke <hare@suse.de>
Date: Wed, 29 Mar 2017 13:05:34 +0200
Subject: scsi_transport_fc: return -EBUSY for deleted vport
References: bsc#1013887
Git-commit: 260f4aeddb48b16b2f4da306f4d97d44ef102f6b
Patch-Mainline: v4.13-rc4

When trying to delete a vport via 'vport_delete' sysfs attribute
we should be checking if the port is already in state VPORT_DELETING;
if so there's no need to do anything.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/scsi_transport_fc.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -1286,7 +1286,7 @@ store_fc_vport_delete(struct device *dev
 	unsigned long flags;
 
 	spin_lock_irqsave(shost->host_lock, flags);
-	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
+	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
 		spin_unlock_irqrestore(shost->host_lock, flags);
 		return -EBUSY;
 	}
@@ -2430,8 +2430,10 @@ fc_remove_host(struct Scsi_Host *shost)
 	spin_lock_irqsave(shost->host_lock, flags);
 
 	/* Remove any vports */
-	list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
+	list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
+		vport->flags |= FC_VPORT_DELETING;
 		fc_queue_work(shost, &vport->vport_delete_work);
+	}
 
 	/* Remove any remote ports */
 	list_for_each_entry_safe(rport, next_rport,