[SCSI] libfc: change to make remote port callback optional

Since the rport list maintenance is now done in the rport module,
the callback (and ops) are usually not necessary.

Allow rdata->ops to be left NULL if nothing needs
to be done in an event callback.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

2 files changed, 5 insertions, 44 deletions

diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index 266aa1ea01e4..3fcbba171863 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -92,37 +92,6 @@ void fc_disc_stop_rports(struct fc_disc *disc)
 }
 
 /**
- * fc_disc_rport_callback() - Event handler for rport events
- * @lport: The lport which is receiving the event
- * @rdata: private remote port data
- * @event: The event that occured
- *
- * Locking Note: The rport lock should not be held when calling
- *               this function.
- */
-static void fc_disc_rport_callback(struct fc_lport *lport,
-                                   struct fc_rport_priv *rdata,
-                                   enum fc_rport_event event)
-{
-        struct fc_disc *disc = &lport->disc;
-
-        FC_DISC_DBG(disc, "Received a %d event for port (%6x)\n", event,
-                    rdata->ids.port_id);
-
-        switch (event) {
-        case RPORT_EV_READY:
-                break;
-        case RPORT_EV_LOGO:
-        case RPORT_EV_FAILED:
-        case RPORT_EV_STOP:
-                break;
-        default:
-                break;
-        }
-
-}
-
-/**
  * fc_disc_recv_rscn_req() - Handle Registered State Change Notification (RSCN)
  * @sp: Current sequence of the RSCN exchange
  * @fp: RSCN Frame
@@ -334,10 +303,6 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
         mutex_unlock(&disc->disc_mutex);
 }
 
-static struct fc_rport_operations fc_disc_rport_ops = {
-        .event_callback = fc_disc_rport_callback,
-};
-
 /**
  * fc_disc_new_target() - Handle new target found by discovery
  * @lport: FC local port
@@ -381,10 +346,8 @@ static int fc_disc_new_target(struct fc_disc *disc,
                         if (!rdata)
                                 error = -ENOMEM;
                 }
-                if (rdata) {
-                        rdata->ops = &fc_disc_rport_ops;
+                if (rdata)
                         lport->tt.rport_login(rdata);
-                }
         }
         return error;
 }
@@ -551,10 +514,9 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
                 if (ids.port_id != fc_host_port_id(lport->host) &&
                     ids.port_name != lport->wwpn) {
                         rdata = lport->tt.rport_create(lport, &ids);
-                        if (rdata) {
-                                rdata->ops = &fc_disc_rport_ops;
+                        if (rdata)
                                 lport->tt.rport_login(rdata);
-                        } else
+                        else
                                 printk(KERN_WARNING "libfc: Failed to allocate "
                                        "memory for the newly discovered port "
                                        "(%6x)\n", ids.port_id);
@@ -697,7 +659,6 @@ static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp)
 
         rdata = lport->tt.rport_create(lport, &dp->ids);
         if (rdata) {
-                rdata->ops = &fc_disc_rport_ops;
                 kfree(dp);
                 lport->tt.rport_login(rdata);
         }
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 29bb6fd10036..406049c13a0e 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -250,7 +250,7 @@ static void fc_rport_work(struct work_struct *work)
                 rp->r_a_tov = rdata->r_a_tov;
                 mutex_unlock(&rdata->rp_mutex);
 
-                if (rport_ops->event_callback) {
+                if (rport_ops && rport_ops->event_callback) {
                         FC_RPORT_DBG(rdata, "callback ev %d\n", event);
                         rport_ops->event_callback(lport, rdata, event);
                 }
@@ -269,7 +269,7 @@ static void fc_rport_work(struct work_struct *work)
                         mutex_unlock(&lport->disc.disc_mutex);
                 }
 
-                if (rport_ops->event_callback) {
+                if (rport_ops && rport_ops->event_callback) {
                         FC_RPORT_DBG(rdata, "callback ev %d\n", event);
                         rport_ops->event_callback(lport, rdata, event);
                 }