[SCSI] fcoe: Remove reference counting on 'stuct fcoe_interface'

The reference counting was necessary on these instances
because it was possible for NPIV ports to be destroyed
after the N_Port. A previous patch ensures that all NPIV
ports are destroyed before the N_Port making the need to
track references on the interface unnecessary.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2 files changed, 5 insertions, 46 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 5126685ab982..278958157e24 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -384,7 +384,6 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
         }
 
         dev_hold(netdev);
-        kref_init(&fcoe->kref);
 
         /*
          * Initialize FIP.
@@ -412,42 +411,6 @@ out:
 }
 
 /**
- * fcoe_interface_release() - fcoe_port kref release function
- * @kref: Embedded reference count in an fcoe_interface struct
- */
-static void fcoe_interface_release(struct kref *kref)
-{
-        struct fcoe_interface *fcoe;
-        struct net_device *netdev;
-
-        fcoe = container_of(kref, struct fcoe_interface, kref);
-        netdev = fcoe->netdev;
-        /* tear-down the FCoE controller */
-        fcoe_ctlr_destroy(&fcoe->ctlr);
-        kfree(fcoe);
-        dev_put(netdev);
-        module_put(THIS_MODULE);
-}
-
-/**
- * fcoe_interface_get() - Get a reference to a FCoE interface
- * @fcoe: The FCoE interface to be held
- */
-static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
-{
-        kref_get(&fcoe->kref);
-}
-
-/**
- * fcoe_interface_put() - Put a reference to a FCoE interface
- * @fcoe: The FCoE interface to be released
- */
-static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
-{
-        kref_put(&fcoe->kref, fcoe_interface_release);
-}
-
-/**
  * fcoe_interface_cleanup() - Clean up a FCoE interface
  * @fcoe: The FCoE interface to be cleaned up
  *
@@ -494,7 +457,11 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
         rtnl_unlock();
 
         /* Release the self-reference taken during fcoe_interface_create() */
-        fcoe_interface_put(fcoe);
+        /* tear-down the FCoE controller */
+        fcoe_ctlr_destroy(fip);
+        kfree(fcoe);
+        dev_put(netdev);
+        module_put(THIS_MODULE);
 }
 
 /**
@@ -976,9 +943,6 @@ static void fcoe_if_destroy(struct fc_lport *lport)
                 dev_uc_del(netdev, port->data_src_addr);
         rtnl_unlock();
 
-        /* Release reference held in fcoe_if_create() */
-        fcoe_interface_put(fcoe);
-
         /* Free queued packets for the per-CPU receive threads */
         fcoe_percpu_clean(lport);
 
@@ -1168,7 +1132,6 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
                 goto out_lp_destroy;
         }
 
-        fcoe_interface_get(fcoe);
         return lport;
 
 out_lp_destroy:
@@ -2113,7 +2076,6 @@ static void fcoe_destroy_work(struct work_struct *work)
 
         fcoe = port->priv;
         fcoe_if_destroy(port->lport);
-
         fcoe_interface_cleanup(fcoe);
 
         mutex_unlock(&fcoe_config_mutex);
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index bcc89e639495..3c2733a12aa1 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -71,8 +71,6 @@ do {                                                            	\
  * @ctlr:             The FCoE controller (for FIP)
  * @oem:              The offload exchange manager for all local port
  *                    instances associated with this port
- * @kref:             The kernel reference
- *
  * This structure is 1:1 with a net devive.
  */
 struct fcoe_interface {
@@ -83,7 +81,6 @@ struct fcoe_interface {
         struct packet_type fip_packet_type;
         struct fcoe_ctlr   ctlr;
         struct fc_exch_mgr *oem;
-        struct kref        kref;
 };
 
 #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)