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yaml
---
r: 2343
b: refs/heads/master
c: 07e4a3e
h: refs/heads/master
i:
  2341: 1fa0b16
  2339: 718ff04
  2335: 3e4d88c
v: v3
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mochel@digitalimplant.org authored and Greg Kroah-Hartman committed Jun 20, 2005
1 parent 15efba7 commit 7510d90
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Showing 5 changed files with 204 additions and 184 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: af70316af182f4716cc5eec7e0d27fc731d164bd
refs/heads/master: 07e4a3e27fe414980ddc85a358e5a56abc48b363
2 changes: 1 addition & 1 deletion trunk/drivers/base/Makefile
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# Makefile for the Linux device tree

obj-y := core.o sys.o bus.o \
obj-y := core.o sys.o bus.o dd.o \
driver.o class.o platform.o \
cpu.o firmware.o init.o map.o dmapool.o \
attribute_container.o transport_class.o
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2 changes: 2 additions & 0 deletions trunk/drivers/base/base.h
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@ extern void bus_remove_device(struct device * dev);
extern int bus_add_driver(struct device_driver *);
extern void bus_remove_driver(struct device_driver *);

extern void driver_detach(struct device_driver * drv);

static inline struct class_device *to_class_dev(struct kobject *obj)
{
return container_of(obj, struct class_device, kobj);
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182 changes: 0 additions & 182 deletions trunk/drivers/base/bus.c
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@
#include "power/power.h"

#define to_dev(node) container_of(node, struct device, bus_list)
#define to_drv(node) container_of(node, struct device_driver, kobj.entry)

#define to_bus_attr(_attr) container_of(_attr, struct bus_attribute, attr)
#define to_bus(obj) container_of(obj, struct bus_type, subsys.kset.kobj)
Expand Down Expand Up @@ -243,181 +242,6 @@ int bus_for_each_drv(struct bus_type * bus, struct device_driver * start,
return ret;
}

/**
* device_bind_driver - bind a driver to one device.
* @dev: device.
*
* Allow manual attachment of a driver to a device.
* Caller must have already set @dev->driver.
*
* Note that this does not modify the bus reference count
* nor take the bus's rwsem. Please verify those are accounted
* for before calling this. (It is ok to call with no other effort
* from a driver's probe() method.)
*/

void device_bind_driver(struct device * dev)
{
pr_debug("bound device '%s' to driver '%s'\n",
dev->bus_id, dev->driver->name);
list_add_tail(&dev->driver_list, &dev->driver->devices);
sysfs_create_link(&dev->driver->kobj, &dev->kobj,
kobject_name(&dev->kobj));
sysfs_create_link(&dev->kobj, &dev->driver->kobj, "driver");
}


/**
* driver_probe_device - attempt to bind device & driver.
* @drv: driver.
* @dev: device.
*
* First, we call the bus's match function, if one present, which
* should compare the device IDs the driver supports with the
* device IDs of the device. Note we don't do this ourselves
* because we don't know the format of the ID structures, nor what
* is to be considered a match and what is not.
*
* If we find a match, we call @drv->probe(@dev) if it exists, and
* call device_bind_driver() above.
*/
int driver_probe_device(struct device_driver * drv, struct device * dev)
{
int error = 0;

if (drv->bus->match && !drv->bus->match(dev, drv))
return -ENODEV;

down(&dev->sem);
dev->driver = drv;
if (drv->probe) {
error = drv->probe(dev);
if (error) {
dev->driver = NULL;
up(&dev->sem);
return error;
}
}
up(&dev->sem);
device_bind_driver(dev);
return 0;
}


/**
* device_attach - try to attach device to a driver.
* @dev: device.
*
* Walk the list of drivers that the bus has and call
* driver_probe_device() for each pair. If a compatible
* pair is found, break out and return.
*/
int device_attach(struct device * dev)
{
struct bus_type * bus = dev->bus;
struct list_head * entry;
int error;

if (dev->driver) {
device_bind_driver(dev);
return 1;
}

if (bus->match) {
list_for_each(entry, &bus->drivers.list) {
struct device_driver * drv = to_drv(entry);
error = driver_probe_device(drv, dev);
if (!error)
/* success, driver matched */
return 1;
if (error != -ENODEV && error != -ENXIO)
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
drv->name, dev->bus_id, error);
}
}

return 0;
}


/**
* driver_attach - try to bind driver to devices.
* @drv: driver.
*
* Walk the list of devices that the bus has on it and try to
* match the driver with each one. If driver_probe_device()
* returns 0 and the @dev->driver is set, we've found a
* compatible pair.
*
* Note that we ignore the -ENODEV error from driver_probe_device(),
* since it's perfectly valid for a driver not to bind to any devices.
*/
void driver_attach(struct device_driver * drv)
{
struct bus_type * bus = drv->bus;
struct list_head * entry;
int error;

if (!bus->match)
return;

list_for_each(entry, &bus->devices.list) {
struct device * dev = container_of(entry, struct device, bus_list);
if (!dev->driver) {
error = driver_probe_device(drv, dev);
if (error && (error != -ENODEV))
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
drv->name, dev->bus_id, error);
}
}
}


/**
* device_release_driver - manually detach device from driver.
* @dev: device.
*
* Manually detach device from driver.
* Note that this is called without incrementing the bus
* reference count nor taking the bus's rwsem. Be sure that
* those are accounted for before calling this function.
*/

void device_release_driver(struct device * dev)
{
struct device_driver * drv;

down(&dev->sem);
drv = dev->driver;
if (drv) {
sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
sysfs_remove_link(&dev->kobj, "driver");
list_del_init(&dev->driver_list);
if (drv->remove)
drv->remove(dev);
dev->driver = NULL;
}
up(&dev->sem);
}


/**
* driver_detach - detach driver from all devices it controls.
* @drv: driver.
*/

static void driver_detach(struct device_driver * drv)
{
while (!list_empty(&drv->devices)) {
struct device * dev = container_of(drv->devices.next, struct device, driver_list);
device_release_driver(dev);
}
}

static int device_add_attrs(struct bus_type * bus, struct device * dev)
{
int error = 0;
Expand Down Expand Up @@ -757,12 +581,6 @@ int __init buses_init(void)
EXPORT_SYMBOL_GPL(bus_for_each_dev);
EXPORT_SYMBOL_GPL(bus_for_each_drv);

EXPORT_SYMBOL_GPL(driver_probe_device);
EXPORT_SYMBOL_GPL(device_bind_driver);
EXPORT_SYMBOL_GPL(device_release_driver);
EXPORT_SYMBOL_GPL(device_attach);
EXPORT_SYMBOL_GPL(driver_attach);

EXPORT_SYMBOL_GPL(bus_add_device);
EXPORT_SYMBOL_GPL(bus_remove_device);
EXPORT_SYMBOL_GPL(bus_register);
Expand Down
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