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Diffstat (limited to 'drivers/base/class.c')
-rw-r--r--drivers/base/class.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 6e2c3b064f5..9c6a0d6408e 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -31,7 +31,7 @@ static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr,
ssize_t ret = -EIO;
if (class_attr->show)
- ret = class_attr->show(cp->class, buf);
+ ret = class_attr->show(cp->class, class_attr, buf);
return ret;
}
@@ -43,7 +43,7 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
ssize_t ret = -EIO;
if (class_attr->store)
- ret = class_attr->store(cp->class, buf, count);
+ ret = class_attr->store(cp->class, class_attr, buf, count);
return ret;
}
@@ -63,7 +63,7 @@ static void class_release(struct kobject *kobj)
kfree(cp);
}
-static struct sysfs_ops class_sysfs_ops = {
+static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show,
.store = class_attr_store,
};
@@ -219,6 +219,8 @@ static void class_create_release(struct class *cls)
* This is used to create a struct class pointer that can then be used
* in calls to device_create().
*
+ * Returns &struct class pointer on success, or ERR_PTR() on error.
+ *
* Note, the pointer created here is to be destroyed when finished by
* making a call to class_destroy().
*/
@@ -490,6 +492,16 @@ void class_interface_unregister(struct class_interface *class_intf)
class_put(parent);
}
+ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
+ char *buf)
+{
+ struct class_attribute_string *cs;
+ cs = container_of(attr, struct class_attribute_string, attr);
+ return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
+}
+
+EXPORT_SYMBOL_GPL(show_class_attr_string);
+
struct class_compat {
struct kobject *kobj;
};