[SCSI] fcoe: move the host-list add/remove to keep out VN_Ports

We only want the FCoE create and destroy routines to deal with top level
N_Ports, the VN_Ports are tracked on the vport list (see scsi_transport_fc).

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 19 insertions, 12 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 43added0a17c..c9a0346e493a 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -616,9 +616,6 @@ static void fcoe_if_destroy(struct fc_lport *lport)
         /* Logout of the fabric */
         fc_fabric_logoff(lport);
 
-        /* Remove the instance from fcoe's list */
-        fcoe_hostlist_remove(lport);
-
         /* Cleanup the fc_lport */
         fc_lport_destroy(lport);
         fc_fcp_destroy(lport);
@@ -757,11 +754,13 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 
         /*
          * fcoe_em_alloc() and fcoe_hostlist_add() both
-         * need to be atomic under fcoe_hostlist_lock
+         * need to be atomic with respect to other changes to the hostlist
          * since fcoe_em_alloc() looks for an existing EM
          * instance on host list updated by fcoe_hostlist_add().
+         *
+         * This is currently handled through the fcoe_config_mutex begin held.
          */
-        write_lock(&fcoe_hostlist_lock);
+
         /* lport exch manager allocation */
         rc = fcoe_em_config(lport);
         if (rc) {
@@ -770,10 +769,6 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
                 goto out_lp_destroy;
         }
 
-        /* add to lports list */
-        fcoe_hostlist_add(lport);
-        write_unlock(&fcoe_hostlist_lock);
-
         dev_hold(netdev);
         fcoe_interface_get(fcoe);
         return lport;
@@ -1713,6 +1708,8 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
                 rc = -ENODEV;
                 goto out_putdev;
         }
+        /* Remove the instance from fcoe's list */
+        fcoe_hostlist_remove(lport);
         port = lport_priv(lport);
         fcoe = port->fcoe;
         fcoe_if_destroy(lport);
@@ -1782,6 +1779,9 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
         /* Make this the "master" N_Port */
         fcoe->ctlr.lp = lport;
 
+        /* add to lports list */
+        fcoe_hostlist_add(lport);
+
         /* start FIP Discovery and FLOGI */
         lport->boot_time = jiffies;
         fc_fabric_login(lport);
@@ -1954,8 +1954,6 @@ struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
  * fcoe_hostlist_add() - Add a lport to lports list
  * @lp: ptr to the fc_lport to be added
  *
- * Called with write fcoe_hostlist_lock held.
- *
  * Returns: 0 for success
  */
 int fcoe_hostlist_add(const struct fc_lport *lport)
@@ -1963,12 +1961,14 @@ int fcoe_hostlist_add(const struct fc_lport *lport)
         struct fcoe_interface *fcoe;
         struct fcoe_port *port;
 
+        write_lock_bh(&fcoe_hostlist_lock);
         fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
         if (!fcoe) {
                 port = lport_priv(lport);
                 fcoe = port->fcoe;
                 list_add_tail(&fcoe->list, &fcoe_hostlist);
         }
+        write_unlock_bh(&fcoe_hostlist_lock);
         return 0;
 }
 
@@ -2045,14 +2045,21 @@ static void __exit fcoe_exit(void)
 {
         unsigned int cpu;
         struct fcoe_interface *fcoe, *tmp;
+        LIST_HEAD(local_list);
 
         mutex_lock(&fcoe_config_mutex);
 
         fcoe_dev_cleanup();
 
         /* releases the associated fcoe hosts */
-        list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list)
+        write_lock_bh(&fcoe_hostlist_lock);
+        list_splice_init(&fcoe_hostlist, &local_list);
+        write_unlock_bh(&fcoe_hostlist_lock);
+
+        list_for_each_entry_safe(fcoe, tmp, &local_list, list) {
+                list_del(&fcoe->list);
                 fcoe_if_destroy(fcoe->ctlr.lp);
+        }
 
         unregister_hotcpu_notifier(&fcoe_cpu_notifier);