[SCSI] ses: fix up functionality after class_device->device conversion

ses uses an unusual two level class hierarchy which broke in this
conversion.  Fix it up still with a two level hierarchy, but this time
let the ses device manage the links to and from the real device in the
enclosure.

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

1 files changed, 71 insertions, 29 deletions

diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index fafb57fed761..0736cff9d97a 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -31,7 +31,6 @@
 static LIST_HEAD(container_list);
 static DEFINE_MUTEX(container_list_lock);
 static struct class enclosure_class;
-static struct class enclosure_component_class;
 
 /**
  * enclosure_find - find an enclosure given a device
@@ -166,6 +165,40 @@ void enclosure_unregister(struct enclosure_device *edev)
 }
 EXPORT_SYMBOL_GPL(enclosure_unregister);
 
+#define ENCLOSURE_NAME_SIZE     64
+
+static void enclosure_link_name(struct enclosure_component *cdev, char *name)
+{
+        strcpy(name, "enclosure_device:");
+        strcat(name, cdev->cdev.bus_id);
+}
+
+static void enclosure_remove_links(struct enclosure_component *cdev)
+{
+        char name[ENCLOSURE_NAME_SIZE];
+
+        enclosure_link_name(cdev, name);
+        sysfs_remove_link(&cdev->dev->kobj, name);
+        sysfs_remove_link(&cdev->cdev.kobj, "device");
+}
+
+static int enclosure_add_links(struct enclosure_component *cdev)
+{
+        int error;
+        char name[ENCLOSURE_NAME_SIZE];
+
+        error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device");
+        if (error)
+                return error;
+
+        enclosure_link_name(cdev, name);
+        error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name);
+        if (error)
+                sysfs_remove_link(&cdev->cdev.kobj, "device");
+
+        return error;
+}
+
 static void enclosure_release(struct device *cdev)
 {
         struct enclosure_device *edev = to_enclosure_device(cdev);
@@ -178,10 +211,15 @@ static void enclosure_component_release(struct device *dev)
 {
         struct enclosure_component *cdev = to_enclosure_component(dev);
 
-        put_device(cdev->dev);
+        if (cdev->dev) {
+                enclosure_remove_links(cdev);
+                put_device(cdev->dev);
+        }
         put_device(dev->parent);
 }
 
+static struct attribute_group *enclosure_groups[];
+
 /**
  * enclosure_component_register - add a particular component to an enclosure
  * @edev:       the enclosure to add the component
@@ -217,12 +255,14 @@ enclosure_component_register(struct enclosure_device *edev,
         ecomp->number = number;
         cdev = &ecomp->cdev;
         cdev->parent = get_device(&edev->edev);
-        cdev->class = &enclosure_component_class;
         if (name)
                 snprintf(cdev->bus_id, BUS_ID_SIZE, "%s", name);
         else
                 snprintf(cdev->bus_id, BUS_ID_SIZE, "%u", number);
 
+        cdev->release = enclosure_component_release;
+        cdev->groups = enclosure_groups;
+
         err = device_register(cdev);
         if (err)
                 ERR_PTR(err);
@@ -255,10 +295,12 @@ int enclosure_add_device(struct enclosure_device *edev, int component,
 
         cdev = &edev->component[component];
 
-        device_del(&cdev->cdev);
+        if (cdev->dev)
+                enclosure_remove_links(cdev);
+
         put_device(cdev->dev);
         cdev->dev = get_device(dev);
-        return device_add(&cdev->cdev);
+        return enclosure_add_links(cdev);
 }
 EXPORT_SYMBOL_GPL(enclosure_add_device);
 
@@ -442,24 +484,32 @@ static ssize_t get_component_type(struct device *cdev,
 }
 
 
-static struct device_attribute enclosure_component_attrs[] = {
-        __ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
-               set_component_fault),
-        __ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
-               set_component_status),
-        __ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
-               set_component_active),
-        __ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
-               set_component_locate),
-        __ATTR(type, S_IRUGO, get_component_type, NULL),
-        __ATTR_NULL
+static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
+                    set_component_fault);
+static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
+                   set_component_status);
+static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
+                   set_component_active);
+static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
+                   set_component_locate);
+static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
+
+static struct attribute *enclosure_component_attrs[] = {
+        &dev_attr_fault.attr,
+        &dev_attr_status.attr,
+        &dev_attr_active.attr,
+        &dev_attr_locate.attr,
+        &dev_attr_type.attr,
+        NULL
 };
 
-static struct class enclosure_component_class =  {
-        .name                   = "enclosure_component",
-        .owner                  = THIS_MODULE,
-        .dev_attrs      = enclosure_component_attrs,
-        .dev_release            = enclosure_component_release,
+static struct attribute_group enclosure_group = {
+        .attrs = enclosure_component_attrs,
+};
+
+static struct attribute_group *enclosure_groups[] = {
+        &enclosure_group,
+        NULL
 };
 
 static int __init enclosure_init(void)
@@ -469,20 +519,12 @@ static int __init enclosure_init(void)
         err = class_register(&enclosure_class);
         if (err)
                 return err;
-        err = class_register(&enclosure_component_class);
-        if (err)
-                goto err_out;
 
         return 0;
- err_out:
-        class_unregister(&enclosure_class);
-
-        return err;
 }
 
 static void __exit enclosure_exit(void)
 {
-        class_unregister(&enclosure_component_class);
         class_unregister(&enclosure_class);
 }