3 files changed, 42 insertions, 1 deletions

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 2d3c4ac475f2..48edd67982a5 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -336,9 +336,23 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
         unsigned long flags;
         const int size = sizeof(struct scsi_target)
                 + shost->transportt->target_size;
-        struct scsi_target *starget = kmalloc(size, GFP_ATOMIC);
+        struct scsi_target *starget;
         struct scsi_target *found_target;
 
+        /*
+         * Obtain the real parent from the transport. The transport
+         * is allowed to fail (no error) if there is nothing at that
+         * target id.
+         */
+        if (shost->transportt->target_parent) {
+                spin_lock_irqsave(shost->host_lock, flags);
+                parent = shost->transportt->target_parent(shost, channel, id);
+                spin_unlock_irqrestore(shost->host_lock, flags);
+                if (!parent)
+                        return NULL;
+        }
+
+        starget = kmalloc(size, GFP_KERNEL);
         if (!starget) {
                 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
                 return NULL;
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 35d1c1e8e345..e6412fce423c 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -1022,6 +1022,23 @@ static int fc_rport_match(struct attribute_container *cont,
         return &i->rport_attr_cont.ac == cont;
 }
 
+
+/*
+ * Must be called with shost->host_lock held
+ */
+static struct device *fc_target_parent(struct Scsi_Host *shost,
+                                        int channel, uint id)
+{
+        struct fc_rport *rport;
+
+        list_for_each_entry(rport, &fc_host_rports(shost), peers)
+                if ((rport->channel == channel) &&
+                    (rport->scsi_target_id == id))
+                        return &rport->dev;
+
+        return NULL;
+}
+
 struct scsi_transport_template *
 fc_attach_transport(struct fc_function_template *ft)
 {
@@ -1057,6 +1074,8 @@ fc_attach_transport(struct fc_function_template *ft)
 
         /* Transport uses the shost workq for scsi scanning */
         i->t.create_work_queue = 1;
+
+        i->t.target_parent = fc_target_parent;
         
         /*
          * Setup SCSI Target Attributes.
diff --git a/include/scsi/scsi_transport.h b/include/scsi/scsi_transport.h
index a4f1837a33b1..f6e0bb484c63 100644
--- a/include/scsi/scsi_transport.h
+++ b/include/scsi/scsi_transport.h
@@ -29,6 +29,14 @@ struct scsi_transport_template {
         struct transport_container target_attrs;
         struct transport_container device_attrs;
 
+        /*
+         * If set, call target_parent prior to allocating a scsi_target,
+         * so we get the appropriate parent for the target. This function
+         * is required for transports like FC and iSCSI that do not put the
+         * scsi_target under scsi_host.
+         */
+        struct device *(*target_parent)(struct Scsi_Host *, int, uint);
+
         /* The size of the specific transport attribute structure (a
          * space of this size will be left at the end of the
          * scsi_* structure */