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Date: Fri, 9 Jan 2009 15:20:54 -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 1/4] Revert "driver core: move knode_bus into private structure"
This reverts commit b9daa99ee533578e3f88231e7a16784dcb44ec42.
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 | 4 ----
drivers/base/bus.c | 40 +++++++++++++---------------------------
include/linux/device.h | 1 +
3 files changed, 14 insertions(+), 31 deletions(-)
diff --git a/drivers/base/base.h b/drivers/base/base.h
index b676f8f..8af0bb2 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -69,7 +69,6 @@ struct class_private {
* @klist_children - klist containing all children of this device
* @knode_parent - node in sibling list
* @knode_driver - node in driver list
- * @knode_bus - node in bus list
* @device - pointer back to the struct class that this structure is
* associated with.
*
@@ -79,15 +78,12 @@ struct device_private {
struct klist klist_children;
struct klist_node knode_parent;
struct klist_node knode_driver;
- struct klist_node knode_bus;
struct device *device;
};
#define to_device_private_parent(obj) \
container_of(obj, struct device_private, knode_parent)
#define to_device_private_driver(obj) \
container_of(obj, struct device_private, knode_driver)
-#define to_device_private_bus(obj) \
- container_of(obj, struct device_private, knode_bus)
/* initialisation functions */
extern int devices_init(void);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 0f0a504..83f32b8 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -253,14 +253,7 @@ static ssize_t store_drivers_probe(struct bus_type *bus,
static struct device *next_device(struct klist_iter *i)
{
struct klist_node *n = klist_next(i);
- struct device *dev = NULL;
- struct device_private *dev_prv;
-
- if (n) {
- dev_prv = to_device_private_bus(n);
- dev = dev_prv->device;
- }
- return dev;
+ return n ? container_of(n, struct device, knode_bus) : NULL;
}
/**
@@ -293,7 +286,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start,
return -EINVAL;
klist_iter_init_node(&bus->p->klist_devices, &i,
- (start ? &start->p->knode_bus : NULL));
+ (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
@@ -327,7 +320,7 @@ struct device *bus_find_device(struct bus_type *bus,
return NULL;
klist_iter_init_node(&bus->p->klist_devices, &i,
- (start ? &start->p->knode_bus : NULL));
+ (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
break;
@@ -514,8 +507,7 @@ void bus_attach_device(struct device *dev)
ret = device_attach(dev);
WARN_ON(ret < 0);
if (ret >= 0)
- klist_add_tail(&dev->p->knode_bus,
- &bus->p->klist_devices);
+ klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
}
}
@@ -536,8 +528,8 @@ void bus_remove_device(struct device *dev)
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev));
device_remove_attrs(dev->bus, dev);
- if (klist_node_attached(&dev->p->knode_bus))
- klist_del(&dev->p->knode_bus);
+ if (klist_node_attached(&dev->knode_bus))
+ klist_del(&dev->knode_bus);
pr_debug("bus: '%s': remove device %s\n",
dev->bus->name, dev_name(dev));
@@ -839,16 +831,14 @@ static void bus_remove_attrs(struct bus_type *bus)
static void klist_devices_get(struct klist_node *n)
{
- struct device_private *dev_prv = to_device_private_bus(n);
- struct device *dev = dev_prv->device;
+ struct device *dev = container_of(n, struct device, knode_bus);
get_device(dev);
}
static void klist_devices_put(struct klist_node *n)
{
- struct device_private *dev_prv = to_device_private_bus(n);
- struct device *dev = dev_prv->device;
+ struct device *dev = container_of(n, struct device, knode_bus);
put_device(dev);
}
@@ -1003,20 +993,18 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list
{
struct list_head *pos;
struct klist_node *n;
- struct device_private *dev_prv;
struct device *b;
list_for_each(pos, list) {
n = container_of(pos, struct klist_node, n_node);
- dev_prv = to_device_private_bus(n);
- b = dev_prv->device;
+ b = container_of(n, struct device, knode_bus);
if (compare(a, b) <= 0) {
- list_move_tail(&a->p->knode_bus.n_node,
- &b->p->knode_bus.n_node);
+ list_move_tail(&a->knode_bus.n_node,
+ &b->knode_bus.n_node);
return;
}
}
- list_move_tail(&a->p->knode_bus.n_node, list);
+ list_move_tail(&a->knode_bus.n_node, list);
}
void bus_sort_breadthfirst(struct bus_type *bus,
@@ -1026,7 +1014,6 @@ void bus_sort_breadthfirst(struct bus_type *bus,
LIST_HEAD(sorted_devices);
struct list_head *pos, *tmp;
struct klist_node *n;
- struct device_private *dev_prv;
struct device *dev;
struct klist *device_klist;
@@ -1035,8 +1022,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
spin_lock(&device_klist->k_lock);
list_for_each_safe(pos, tmp, &device_klist->k_list) {
n = container_of(pos, struct klist_node, n_node);
- dev_prv = to_device_private_bus(n);
- dev = dev_prv->device;
+ dev = container_of(n, struct device, knode_bus);
device_insertion_sort_klist(dev, &sorted_devices, compare);
}
list_splice(&sorted_devices, &device_klist->k_list);
diff --git a/include/linux/device.h b/include/linux/device.h
index 7d9da4b..8987f47 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -366,6 +366,7 @@ struct device_dma_parameters {
};
struct device {
+ struct klist_node knode_bus;
struct device *parent;
struct device_private *p;
--
1.6.0.4
--
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