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Date: Fri, 9 Jan 2009 15:20:56 -0800
From: Greg Kroah-Hartman <gregkh@...e.de>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...e.de>,
Alan Cox <alan@...rguk.ukuu.org.uk>,
Kay Sievers <kay.sievers@...y.org>
Subject: [PATCH 3/4] Revert "driver core: move klist_children into private structure"
This reverts commit 11c3b5c3e08f4d855cbef52883c266b9ab9df879.
Turns out that device_initialize shouldn't fail silently.
This series needs to be reworked in order to get into proper
shape.
Reported-by: Stefan Richter <stefanr@...6.in-berlin.de>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: Kay Sievers <kay.sievers@...y.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
drivers/base/base.h | 6 ------
drivers/base/core.c | 37 +++++++++++++------------------------
include/linux/device.h | 2 ++
3 files changed, 15 insertions(+), 30 deletions(-)
diff --git a/drivers/base/base.h b/drivers/base/base.h
index f5cf31c..6b20809 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -66,20 +66,14 @@ struct class_private {
/**
* struct device_private - structure to hold the private to the driver core portions of the device structure.
*
- * @klist_children - klist containing all children of this device
- * @knode_parent - node in sibling list
* @device - pointer back to the struct class that this structure is
* associated with.
*
* Nothing outside of the driver core should ever touch these fields.
*/
struct device_private {
- struct klist klist_children;
- struct klist_node knode_parent;
struct device *device;
};
-#define to_device_private_parent(obj) \
- container_of(obj, struct device_private, knode_parent)
/* initialisation functions */
extern int devices_init(void);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 61df508..5c2acf7 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -509,16 +509,14 @@ EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
static void klist_children_get(struct klist_node *n)
{
- struct device_private *p = to_device_private_parent(n);
- struct device *dev = p->device;
+ struct device *dev = container_of(n, struct device, knode_parent);
get_device(dev);
}
static void klist_children_put(struct klist_node *n)
{
- struct device_private *p = to_device_private_parent(n);
- struct device *dev = p->device;
+ struct device *dev = container_of(n, struct device, knode_parent);
put_device(dev);
}
@@ -548,7 +546,7 @@ void device_initialize(struct device *dev)
dev->p->device = dev;
dev->kobj.kset = devices_kset;
kobject_init(&dev->kobj, &device_ktype);
- klist_init(&dev->p->klist_children, klist_children_get,
+ klist_init(&dev->klist_children, klist_children_get,
klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools);
init_MUTEX(&dev->sem);
@@ -932,8 +930,7 @@ int device_add(struct device *dev)
kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_attach_device(dev);
if (parent)
- klist_add_tail(&dev->p->knode_parent,
- &parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent, &parent->klist_children);
if (dev->class) {
mutex_lock(&dev->class->p->class_mutex);
@@ -1047,7 +1044,7 @@ void device_del(struct device *dev)
device_pm_remove(dev);
dpm_sysfs_remove(dev);
if (parent)
- klist_del(&dev->p->knode_parent);
+ klist_del(&dev->knode_parent);
if (MAJOR(dev->devt)) {
device_remove_sys_dev_entry(dev);
device_remove_file(dev, &devt_attr);
@@ -1108,14 +1105,7 @@ void device_unregister(struct device *dev)
static struct device *next_device(struct klist_iter *i)
{
struct klist_node *n = klist_next(i);
- struct device *dev = NULL;
- struct device_private *p;
-
- if (n) {
- p = to_device_private_parent(n);
- dev = p->device;
- }
- return dev;
+ return n ? container_of(n, struct device, knode_parent) : NULL;
}
/**
@@ -1137,7 +1127,7 @@ int device_for_each_child(struct device *parent, void *data,
struct device *child;
int error = 0;
- klist_iter_init(&parent->p->klist_children, &i);
+ klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)) && !error)
error = fn(child, data);
klist_iter_exit(&i);
@@ -1168,7 +1158,7 @@ struct device *device_find_child(struct device *parent, void *data,
if (!parent)
return NULL;
- klist_iter_init(&parent->p->klist_children, &i);
+ klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)))
if (match(child, data) && get_device(child))
break;
@@ -1582,10 +1572,9 @@ int device_move(struct device *dev, struct device *new_parent)
old_parent = dev->parent;
dev->parent = new_parent;
if (old_parent)
- klist_remove(&dev->p->knode_parent);
+ klist_remove(&dev->knode_parent);
if (new_parent) {
- klist_add_tail(&dev->p->knode_parent,
- &new_parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
set_dev_node(dev, dev_to_node(new_parent));
}
@@ -1597,11 +1586,11 @@ int device_move(struct device *dev, struct device *new_parent)
device_move_class_links(dev, new_parent, old_parent);
if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
if (new_parent)
- klist_remove(&dev->p->knode_parent);
+ klist_remove(&dev->knode_parent);
dev->parent = old_parent;
if (old_parent) {
- klist_add_tail(&dev->p->knode_parent,
- &old_parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent,
+ &old_parent->klist_children);
set_dev_node(dev, dev_to_node(old_parent));
}
}
diff --git a/include/linux/device.h b/include/linux/device.h
index c66ceb1..2975351 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -366,6 +366,8 @@ struct device_dma_parameters {
};
struct device {
+ struct klist klist_children;
+ struct klist_node knode_parent; /* node in sibling list */
struct klist_node knode_driver;
struct klist_node knode_bus;
struct device *parent;
--
1.6.0.4
--
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