[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, 3 insertions, 6 deletions

diff --git a/include/linux/attribute_container.h b/include/linux/attribute_container.h
index af1010b6dab7..f54b05b052b3 100644
--- a/include/linux/attribute_container.h
+++ b/include/linux/attribute_container.h
@@ -11,10 +11,12 @@
 
 #include <linux/device.h>
 #include <linux/list.h>
+#include <linux/spinlock.h>
 
 struct attribute_container {
         struct list_head        node;
         struct list_head        containers;
+        spinlock_t              containers_lock;
         struct class            *class;
         struct class_device_attribute **attrs;
         int (*match)(struct attribute_container *, struct device *);
@@ -62,12 +64,7 @@ int attribute_container_add_class_device_adapter(struct attribute_container *con
                                                  struct class_device *classdev);
 void attribute_container_remove_attrs(struct class_device *classdev);
 void attribute_container_class_device_del(struct class_device *classdev);
-
-
-
-
-
-
+struct class_device *attribute_container_find_class_device(struct attribute_container *, struct device *);
 struct class_device_attribute **attribute_container_classdev_to_attrs(const struct class_device *classdev);
 
 #endif