/*
- * drivers/base/dd.c - The core device/driver interactions.
+ * drivers/base/dd.c - The core device/driver interactions.
*
- * This file contains the (sometimes tricky) code that controls the
- * interactions between devices and drivers, which primarily includes
- * driver binding and unbinding.
+ * This file contains the (sometimes tricky) code that controls the
+ * interactions between devices and drivers, which primarily includes
+ * driver binding and unbinding.
*
- * All of this code used to exist in drivers/base/bus.c, but was
- * relocated to here in the name of compartmentalization (since it wasn't
- * strictly code just for the 'struct bus_type'.
+ * All of this code used to exist in drivers/base/bus.c, but was
+ * relocated to here in the name of compartmentalization (since it wasn't
+ * strictly code just for the 'struct bus_type'.
*
- * Copyright (c) 2002-5 Patrick Mochel
- * Copyright (c) 2002-3 Open Source Development Labs
- * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
- * Copyright (c) 2007 Novell Inc.
+ * Copyright (c) 2002-5 Patrick Mochel
+ * Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007 Novell Inc.
*
- * This file is released under the GPLv2
+ * This file is released under the GPLv2
*/
#include <linux/device.h>
+#include <linux/delay.h>
#include <linux/module.h>
#include <linux/kthread.h>
#include <linux/wait.h>
+#include <linux/async.h>
#include "base.h"
#include "power/power.h"
{
if (klist_node_attached(&dev->knode_driver)) {
printk(KERN_WARNING "%s: device %s already bound\n",
- __FUNCTION__, kobject_name(&dev->kobj));
+ __func__, kobject_name(&dev->kobj));
return;
}
- pr_debug("driver: '%s': %s: bound to device '%s'\n", dev->bus_id,
- __FUNCTION__, dev->driver->name);
+ pr_debug("driver: '%s': %s: bound to device '%s'\n", dev_name(dev),
+ __func__, dev->driver->name);
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
}
/**
- * device_bind_driver - bind a driver to one device.
- * @dev: device.
+ * 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.
+ * 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.)
+ * 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.)
*
- * This function must be called with @dev->sem held.
+ * This function must be called with @dev->sem held.
*/
int device_bind_driver(struct device *dev)
{
driver_bound(dev);
return ret;
}
+EXPORT_SYMBOL_GPL(device_bind_driver);
static atomic_t probe_count = ATOMIC_INIT(0);
static DECLARE_WAIT_QUEUE_HEAD(probe_waitqueue);
atomic_inc(&probe_count);
pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
- drv->bus->name, __FUNCTION__, drv->name, dev->bus_id);
+ drv->bus->name, __func__, drv->name, dev_name(dev));
WARN_ON(!list_empty(&dev->devres_head));
dev->driver = drv;
if (driver_sysfs_add(dev)) {
printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n",
- __FUNCTION__, dev->bus_id);
+ __func__, dev_name(dev));
goto probe_failed;
}
driver_bound(dev);
ret = 1;
pr_debug("bus: '%s': %s: bound device %s to driver %s\n",
- drv->bus->name, __FUNCTION__, dev->bus_id, drv->name);
+ drv->bus->name, __func__, dev_name(dev), drv->name);
goto done;
probe_failed:
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
- drv->name, dev->bus_id, ret);
+ drv->name, dev_name(dev), ret);
}
/*
* Ignore errors returned by ->probe so that the next driver can try
*/
int driver_probe_done(void)
{
- pr_debug("%s: probe_count = %d\n", __FUNCTION__,
+ pr_debug("%s: probe_count = %d\n", __func__,
atomic_read(&probe_count));
if (atomic_read(&probe_count))
return -EBUSY;
}
/**
+ * wait_for_device_probe
+ * Wait for device probing to be completed.
+ *
+ * Note: this function polls at 100 msec intervals.
+ */
+int wait_for_device_probe(void)
+{
+ /* wait for the known devices to complete their probing */
+ while (driver_probe_done() != 0)
+ msleep(100);
+ async_synchronize_full();
+ return 0;
+}
+
+/**
* driver_probe_device - attempt to bind device & driver together
* @drv: driver to bind a device to
* @dev: device to try to bind to the driver
* This function must be called with @dev->sem held. When called for a
* USB interface, @dev->parent->sem must be held as well.
*/
-int driver_probe_device(struct device_driver * drv, struct device * dev)
+int driver_probe_device(struct device_driver *drv, struct device *dev)
{
int ret = 0;
goto done;
pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
- drv->bus->name, __FUNCTION__, dev->bus_id, drv->name);
+ drv->bus->name, __func__, dev_name(dev), drv->name);
ret = really_probe(dev, drv);
return ret;
}
-static int __device_attach(struct device_driver * drv, void * data)
+static int __device_attach(struct device_driver *drv, void *data)
{
- struct device * dev = data;
+ struct device *dev = data;
return driver_probe_device(drv, dev);
}
/**
- * device_attach - try to attach device to a driver.
- * @dev: device.
+ * 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.
+ * 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.
*
- * Returns 1 if the device was bound to a driver;
- * 0 if no matching device was found;
- * -ENODEV if the device is not registered.
+ * Returns 1 if the device was bound to a driver;
+ * 0 if no matching device was found;
+ * -ENODEV if the device is not registered.
*
- * When called for a USB interface, @dev->parent->sem must be held.
+ * When called for a USB interface, @dev->parent->sem must be held.
*/
-int device_attach(struct device * dev)
+int device_attach(struct device *dev)
{
int ret = 0;
up(&dev->sem);
return ret;
}
+EXPORT_SYMBOL_GPL(device_attach);
-static int __driver_attach(struct device * dev, void * data)
+static int __driver_attach(struct device *dev, void *data)
{
- struct device_driver * drv = data;
+ struct device_driver *drv = data;
/*
* Lock device and try to bind to it. We drop the error
* is an error.
*/
+ if (drv->bus->match && !drv->bus->match(dev, drv))
+ return 0;
+
if (dev->parent) /* Needed for USB */
down(&dev->parent->sem);
down(&dev->sem);
}
/**
- * driver_attach - try to bind driver to devices.
- * @drv: driver.
+ * 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.
+ * 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.
*/
-int driver_attach(struct device_driver * drv)
+int driver_attach(struct device_driver *drv)
{
return bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);
}
+EXPORT_SYMBOL_GPL(driver_attach);
/*
- * __device_release_driver() must be called with @dev->sem held.
- * When called for a USB interface, @dev->parent->sem must be held as well.
+ * __device_release_driver() must be called with @dev->sem held.
+ * When called for a USB interface, @dev->parent->sem must be held as well.
*/
-static void __device_release_driver(struct device * dev)
+static void __device_release_driver(struct device *dev)
{
- struct device_driver * drv;
+ struct device_driver *drv;
drv = dev->driver;
if (drv) {
driver_sysfs_remove(dev);
- sysfs_remove_link(&dev->kobj, "driver");
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
}
/**
- * device_release_driver - manually detach device from driver.
- * @dev: device.
+ * device_release_driver - manually detach device from driver.
+ * @dev: device.
*
- * Manually detach device from driver.
- * When called for a USB interface, @dev->parent->sem must be held.
+ * Manually detach device from driver.
+ * When called for a USB interface, @dev->parent->sem must be held.
*/
-void device_release_driver(struct device * dev)
+void device_release_driver(struct device *dev)
{
/*
* If anyone calls device_release_driver() recursively from
__device_release_driver(dev);
up(&dev->sem);
}
-
+EXPORT_SYMBOL_GPL(device_release_driver);
/**
* driver_detach - detach driver from all devices it controls.
* @drv: driver.
*/
-void driver_detach(struct device_driver * drv)
+void driver_detach(struct device_driver *drv)
{
- struct device * dev;
+ struct device *dev;
for (;;) {
spin_lock(&drv->p->klist_devices.k_lock);
put_device(dev);
}
}
-
-EXPORT_SYMBOL_GPL(device_bind_driver);
-EXPORT_SYMBOL_GPL(device_release_driver);
-EXPORT_SYMBOL_GPL(device_attach);
-EXPORT_SYMBOL_GPL(driver_attach);
-
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff