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path: root/drivers/base/class.c
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Diffstat (limited to 'drivers/base/class.c')
-rw-r--r--drivers/base/class.c39
1 files changed, 33 insertions, 6 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 0154a1623b2..d164c32a97a 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -299,10 +299,8 @@ static void class_dev_release(struct kobject * kobj)
pr_debug("device class '%s': release.\n", cd->class_id);
- if (cd->devt_attr) {
- kfree(cd->devt_attr);
- cd->devt_attr = NULL;
- }
+ kfree(cd->devt_attr);
+ cd->devt_attr = NULL;
if (cls->release)
cls->release(cd);
@@ -452,10 +450,29 @@ void class_device_initialize(struct class_device *class_dev)
INIT_LIST_HEAD(&class_dev->node);
}
+static char *make_class_name(struct class_device *class_dev)
+{
+ char *name;
+ int size;
+
+ size = strlen(class_dev->class->name) +
+ strlen(kobject_name(&class_dev->kobj)) + 2;
+
+ name = kmalloc(size, GFP_KERNEL);
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
+ strcpy(name, class_dev->class->name);
+ strcat(name, ":");
+ strcat(name, kobject_name(&class_dev->kobj));
+ return name;
+}
+
int class_device_add(struct class_device *class_dev)
{
struct class * parent = NULL;
struct class_interface * class_intf;
+ char *class_name = NULL;
int error;
class_dev = class_device_get(class_dev);
@@ -500,9 +517,13 @@ int class_device_add(struct class_device *class_dev)
}
class_device_add_attrs(class_dev);
- if (class_dev->dev)
+ if (class_dev->dev) {
+ class_name = make_class_name(class_dev);
sysfs_create_link(&class_dev->kobj,
&class_dev->dev->kobj, "device");
+ sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,
+ class_name);
+ }
/* notify any interfaces this device is now here */
if (parent) {
@@ -519,6 +540,7 @@ int class_device_add(struct class_device *class_dev)
if (error && parent)
class_put(parent);
class_device_put(class_dev);
+ kfree(class_name);
return error;
}
@@ -584,6 +606,7 @@ void class_device_del(struct class_device *class_dev)
{
struct class * parent = class_dev->class;
struct class_interface * class_intf;
+ char *class_name = NULL;
if (parent) {
down(&parent->sem);
@@ -594,8 +617,11 @@ void class_device_del(struct class_device *class_dev)
up(&parent->sem);
}
- if (class_dev->dev)
+ if (class_dev->dev) {
+ class_name = make_class_name(class_dev);
sysfs_remove_link(&class_dev->kobj, "device");
+ sysfs_remove_link(&class_dev->dev->kobj, class_name);
+ }
if (class_dev->devt_attr)
class_device_remove_file(class_dev, class_dev->devt_attr);
class_device_remove_attrs(class_dev);
@@ -605,6 +631,7 @@ void class_device_del(struct class_device *class_dev)
if (parent)
class_put(parent);
+ kfree(class_name);
}
void class_device_unregister(struct class_device *class_dev)