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-rw-r--r--drivers/scsi/scsi_scan.c16
-rw-r--r--drivers/scsi/scsi_transport_fc.c19
-rw-r--r--include/scsi/scsi_transport.h8
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 */