1 files changed, 76 insertions, 10 deletions

diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index ec615d854be9..373e7b728fa7 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -22,11 +22,26 @@
 /* This is a private structure used to tie the classdev and the
  * container .. it should never be visible outside this file */
 struct internal_container {
-        struct list_head node;
+        struct klist_node node;
         struct attribute_container *cont;
         struct class_device classdev;
 };
 
+static void internal_container_klist_get(struct klist_node *n)
+{
+        struct internal_container *ic =
+                container_of(n, struct internal_container, node);
+        class_device_get(&ic->classdev);
+}
+
+static void internal_container_klist_put(struct klist_node *n)
+{
+        struct internal_container *ic =
+                container_of(n, struct internal_container, node);
+        class_device_put(&ic->classdev);
+}
+
+
 /**
  * attribute_container_classdev_to_container - given a classdev, return the container
  *
@@ -57,7 +72,8 @@ int
 attribute_container_register(struct attribute_container *cont)
 {
         INIT_LIST_HEAD(&cont->node);
-        INIT_LIST_HEAD(&cont->containers);
+        klist_init(&cont->containers,internal_container_klist_get,
+                   internal_container_klist_put);
                 
         down(&attribute_container_mutex);
         list_add_tail(&cont->node, &attribute_container_list);
@@ -77,11 +93,13 @@ attribute_container_unregister(struct attribute_container *cont)
 {
         int retval = -EBUSY;
         down(&attribute_container_mutex);
-        if (!list_empty(&cont->containers))
+        spin_lock(&cont->containers.k_lock);
+        if (!list_empty(&cont->containers.k_list))
                 goto out;
         retval = 0;
         list_del(&cont->node);
  out:
+        spin_unlock(&cont->containers.k_lock);
         up(&attribute_container_mutex);
         return retval;
                 
@@ -140,7 +158,6 @@ attribute_container_add_device(struct device *dev,
                         continue;
                 }
                 memset(ic, 0, sizeof(struct internal_container));
-                INIT_LIST_HEAD(&ic->node);
                 ic->cont = cont;
                 class_device_initialize(&ic->classdev);
                 ic->classdev.dev = get_device(dev);
@@ -151,11 +168,22 @@ attribute_container_add_device(struct device *dev,
                         fn(cont, dev, &ic->classdev);
                 else
                         attribute_container_add_class_device(&ic->classdev);
-                list_add_tail(&ic->node, &cont->containers);
+                klist_add_tail(&ic->node, &cont->containers);
         }
         up(&attribute_container_mutex);
 }
 
+/* FIXME: can't break out of this unless klist_iter_exit is also
+ * called before doing the break
+ */
+#define klist_for_each_entry(pos, head, member, iter) \
+        for (klist_iter_init(head, iter); (pos = ({ \
+                struct klist_node *n = klist_next(iter); \
+                n ? container_of(n, typeof(*pos), member) : \
+                        ({ klist_iter_exit(iter) ; NULL; }); \
+        }) ) != NULL; )
+                        
+
 /**
  * attribute_container_remove_device - make device eligible for removal.
  *
@@ -182,17 +210,19 @@ attribute_container_remove_device(struct device *dev,
 
         down(&attribute_container_mutex);
         list_for_each_entry(cont, &attribute_container_list, node) {
-                struct internal_container *ic, *tmp;
+                struct internal_container *ic;
+                struct klist_iter iter;
 
                 if (attribute_container_no_classdevs(cont))
                         continue;
 
                 if (!cont->match(cont, dev))
                         continue;
-                list_for_each_entry_safe(ic, tmp, &cont->containers, node) {
+
+                klist_for_each_entry(ic, &cont->containers, node, &iter) {
                         if (dev != ic->classdev.dev)
                                 continue;
-                        list_del(&ic->node);
+                        klist_del(&ic->node);
                         if (fn)
                                 fn(cont, dev, &ic->classdev);
                         else {
@@ -225,12 +255,18 @@ attribute_container_device_trigger(struct device *dev,
 
         down(&attribute_container_mutex);
         list_for_each_entry(cont, &attribute_container_list, node) {
-                struct internal_container *ic, *tmp;
+                struct internal_container *ic;
+                struct klist_iter iter;
 
                 if (!cont->match(cont, dev))
                         continue;
 
-                list_for_each_entry_safe(ic, tmp, &cont->containers, node) {
+                if (attribute_container_no_classdevs(cont)) {
+                        fn(cont, dev, NULL);
+                        continue;
+                }
+
+                klist_for_each_entry(ic, &cont->containers, node, &iter) {
                         if (dev == ic->classdev.dev)
                                 fn(cont, dev, &ic->classdev);
                 }
@@ -368,6 +404,36 @@ attribute_container_class_device_del(struct class_device *classdev)
 }
 EXPORT_SYMBOL_GPL(attribute_container_class_device_del);
 
+/**
+ * attribute_container_find_class_device - find the corresponding class_device
+ *
+ * @cont:       the container
+ * @dev:        the generic device
+ *
+ * Looks up the device in the container's list of class devices and returns
+ * the corresponding class_device.
+ */
+struct class_device *
+attribute_container_find_class_device(struct attribute_container *cont,
+                                      struct device *dev)
+{
+        struct class_device *cdev = NULL;
+        struct internal_container *ic;
+        struct klist_iter iter;
+
+        klist_for_each_entry(ic, &cont->containers, node, &iter) {
+                if (ic->classdev.dev == dev) {
+                        cdev = &ic->classdev;
+                        /* FIXME: must exit iterator then break */
+                        klist_iter_exit(&iter);
+                        break;
+                }
+        }
+
+        return cdev;
+}
+EXPORT_SYMBOL_GPL(attribute_container_find_class_device);
+
 int __init
 attribute_container_init(void)
 {