[SCSI] correct transport class abstraction to work outside SCSI

I recently tried to construct a totally generic transport class and
found there were certain features missing from the current abstract
transport class.  Most notable is that you have to hang the data on the
class_device but most of the API is framed in terms of the generic
device, not the class_device.

These changes are two fold

- Provide the class_device to all of the setup and configure APIs
- Provide and extra API to take the device and the attribute class and
  return the corresponding class_device

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/include/linux/transport_class.h b/include/linux/transport_class.h
index 87d98d1faef..1d6cc22e5f4 100644
--- a/include/linux/transport_class.h
+++ b/include/linux/transport_class.h
@@ -12,11 +12,16 @@
 #include <linux/device.h>
 #include <linux/attribute_container.h>
 
+struct transport_container;
+
 struct transport_class {
 	struct class class;
-	int (*setup)(struct device *);
-	int (*configure)(struct device *);
-	int (*remove)(struct device *);
+	int (*setup)(struct transport_container *, struct device *,
+		     struct class_device *);
+	int (*configure)(struct transport_container *, struct device *,
+			 struct class_device *);
+	int (*remove)(struct transport_container *, struct device *,
+		      struct class_device *);
 };
 
 #define DECLARE_TRANSPORT_CLASS(cls, nm, su, rm, cfg)			\