SCSI: fix HBA removal problem with transport classes

James Smart pointed out that if you insert and remove a HBA driver a few
times, eventually the system oopses.

The reason is that the transport classes all kfree their attribute
containers, but don't actually unregister them first (so we have freed
memory on the container list).  The attached should fix this.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_transport_fc.c

@@ -847,6 +847,9 @@ void fc_release_transport(struct scsi_transport_template *t)
 {
 	struct fc_internal *i = to_fc_internal(t);
 
+	attribute_container_unregister(&i->t.target_attrs);
+	attribute_container_unregister(&i->t.host_attrs);
+
 	kfree(i);
 }
 EXPORT_SYMBOL(fc_release_transport);

drivers/scsi/scsi_transport_iscsi.c

@@ -356,6 +356,10 @@ EXPORT_SYMBOL(iscsi_attach_transport);
 void iscsi_release_transport(struct scsi_transport_template *t)
 {
 	struct iscsi_internal *i = to_iscsi_internal(t);
+
+	attribute_container_unregister(&i->t.target_attrs);
+	attribute_container_unregister(&i->t.host_attrs);
+
 	kfree(i);
 }
 

drivers/scsi/scsi_transport_spi.c

@@ -921,6 +921,9 @@ void spi_release_transport(struct scsi_transport_template *t)
 {
 	struct spi_internal *i = to_spi_internal(t);
 
+	attribute_container_unregister(&i->t.target_attrs);
+	attribute_container_unregister(&i->t.host_attrs);
+
 	kfree(i);
 }
 EXPORT_SYMBOL(spi_release_transport);