Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 645f626..783752b 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -5,6 +5,7 @@
extern void bus_remove_driver(struct device_driver *);
extern void driver_detach(struct device_driver * drv);
+extern int driver_probe_device(struct device_driver *, struct device *);
static inline struct class_device *to_class_dev(struct kobject *obj)
{
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index c3fac7f..96fe2f9 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -133,6 +133,58 @@
decl_subsys(bus, &ktype_bus, NULL);
+/* Manually detach a device from it's associated driver. */
+static int driver_helper(struct device *dev, void *data)
+{
+ const char *name = data;
+
+ if (strcmp(name, dev->bus_id) == 0)
+ return 1;
+ return 0;
+}
+
+static ssize_t driver_unbind(struct device_driver *drv,
+ const char *buf, size_t count)
+{
+ struct bus_type *bus = get_bus(drv->bus);
+ struct device *dev;
+ int err = -ENODEV;
+
+ dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
+ if ((dev) &&
+ (dev->driver == drv)) {
+ device_release_driver(dev);
+ err = count;
+ }
+ return err;
+}
+static DRIVER_ATTR(unbind, S_IWUSR, NULL, driver_unbind);
+
+/*
+ * Manually attach a device to a driver.
+ * Note: the driver must want to bind to the device,
+ * it is not possible to override the driver's id table.
+ */
+static ssize_t driver_bind(struct device_driver *drv,
+ const char *buf, size_t count)
+{
+ struct bus_type *bus = get_bus(drv->bus);
+ struct device *dev;
+ int err = -ENODEV;
+
+ dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
+ if ((dev) &&
+ (dev->driver == NULL)) {
+ down(&dev->sem);
+ err = driver_probe_device(drv, dev);
+ up(&dev->sem);
+ put_device(dev);
+ }
+ return err;
+}
+static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);
+
+
static struct device * next_device(struct klist_iter * i)
{
struct klist_node * n = klist_next(i);
@@ -177,6 +229,39 @@
return error;
}
+/**
+ * bus_find_device - device iterator for locating a particular device.
+ * @bus: bus type
+ * @start: Device to begin with
+ * @data: Data to pass to match function
+ * @match: Callback function to check device
+ *
+ * This is similar to the bus_for_each_dev() function above, but it
+ * returns a reference to a device that is 'found' for later use, as
+ * determined by the @match callback.
+ *
+ * The callback should return 0 if the device doesn't match and non-zero
+ * if it does. If the callback returns non-zero, this function will
+ * return to the caller and not iterate over any more devices.
+ */
+struct device * bus_find_device(struct bus_type *bus,
+ struct device *start, void *data,
+ int (*match)(struct device *, void *))
+{
+ struct klist_iter i;
+ struct device *dev;
+
+ if (!bus)
+ return NULL;
+
+ klist_iter_init_node(&bus->klist_devices, &i,
+ (start ? &start->knode_bus : NULL));
+ while ((dev = next_device(&i)))
+ if (match(dev, data) && get_device(dev))
+ break;
+ klist_iter_exit(&i);
+ return dev;
+}
static struct device_driver * next_driver(struct klist_iter * i)
@@ -363,6 +448,8 @@
module_add_driver(drv->owner, drv);
driver_add_attrs(bus, drv);
+ driver_create_file(drv, &driver_attr_unbind);
+ driver_create_file(drv, &driver_attr_bind);
}
return error;
}
@@ -380,6 +467,8 @@
void bus_remove_driver(struct device_driver * drv)
{
if (drv->bus) {
+ driver_remove_file(drv, &driver_attr_bind);
+ driver_remove_file(drv, &driver_attr_unbind);
driver_remove_attrs(drv->bus, drv);
klist_remove(&drv->knode_bus);
pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);
@@ -394,31 +483,22 @@
/* Helper for bus_rescan_devices's iter */
static int bus_rescan_devices_helper(struct device *dev, void *data)
{
- int *count = data;
-
- if (!dev->driver && (device_attach(dev) > 0))
- (*count)++;
-
+ if (!dev->driver)
+ device_attach(dev);
return 0;
}
-
/**
- * bus_rescan_devices - rescan devices on the bus for possible drivers
- * @bus: the bus to scan.
+ * bus_rescan_devices - rescan devices on the bus for possible drivers
+ * @bus: the bus to scan.
*
- * This function will look for devices on the bus with no driver
- * attached and rescan it against existing drivers to see if it
- * matches any. Calls device_attach(). Returns the number of devices
- * that were sucessfully bound to a driver.
+ * This function will look for devices on the bus with no driver
+ * attached and rescan it against existing drivers to see if it matches
+ * any by calling device_attach() for the unbound devices.
*/
-int bus_rescan_devices(struct bus_type * bus)
+void bus_rescan_devices(struct bus_type * bus)
{
- int count = 0;
-
- bus_for_each_dev(bus, NULL, &count, bus_rescan_devices_helper);
-
- return count;
+ bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
}
@@ -557,6 +637,7 @@
EXPORT_SYMBOL_GPL(bus_for_each_dev);
+EXPORT_SYMBOL_GPL(bus_find_device);
EXPORT_SYMBOL_GPL(bus_for_each_drv);
EXPORT_SYMBOL_GPL(bus_add_device);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 86d7975..efe03a0 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -333,7 +333,7 @@
struct device * parent = dev->parent;
if (parent)
- klist_remove(&dev->knode_parent);
+ klist_del(&dev->knode_parent);
/* Notify the platform of the removal, in case they
* need to do anything...
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 6db3a78..16323f9 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -65,7 +65,7 @@
*
* This function must be called with @dev->sem held.
*/
-static 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;
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 1b64588..291c595 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -56,6 +56,41 @@
/**
+ * driver_find_device - device iterator for locating a particular device.
+ * @driver: The device's driver
+ * @start: Device to begin with
+ * @data: Data to pass to match function
+ * @match: Callback function to check device
+ *
+ * This is similar to the driver_for_each_device() function above, but
+ * it returns a reference to a device that is 'found' for later use, as
+ * determined by the @match callback.
+ *
+ * The callback should return 0 if the device doesn't match and non-zero
+ * if it does. If the callback returns non-zero, this function will
+ * return to the caller and not iterate over any more devices.
+ */
+struct device * driver_find_device(struct device_driver *drv,
+ struct device * start, void * data,
+ int (*match)(struct device *, void *))
+{
+ struct klist_iter i;
+ struct device *dev;
+
+ if (!drv)
+ return NULL;
+
+ klist_iter_init_node(&drv->klist_devices, &i,
+ (start ? &start->knode_driver : NULL));
+ while ((dev = next_device(&i)))
+ if (match(dev, data) && get_device(dev))
+ break;
+ klist_iter_exit(&i);
+ return dev;
+}
+EXPORT_SYMBOL_GPL(driver_find_device);
+
+/**
* driver_create_file - create sysfs file for driver.
* @drv: driver.
* @attr: driver attribute descriptor.
diff --git a/include/linux/device.h b/include/linux/device.h
index 7b781a7..f378c84 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -69,7 +69,7 @@
extern int bus_register(struct bus_type * bus);
extern void bus_unregister(struct bus_type * bus);
-extern int bus_rescan_devices(struct bus_type * bus);
+extern void bus_rescan_devices(struct bus_type * bus);
extern struct bus_type * get_bus(struct bus_type * bus);
extern void put_bus(struct bus_type * bus);
@@ -80,6 +80,8 @@
int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data,
int (*fn)(struct device *, void *));
+struct device * bus_find_device(struct bus_type *bus, struct device *start,
+ void *data, int (*match)(struct device *, void *));
int bus_for_each_drv(struct bus_type * bus, struct device_driver * start,
void * data, int (*fn)(struct device_driver *, void *));
@@ -142,6 +144,9 @@
extern int driver_for_each_device(struct device_driver * drv, struct device * start,
void * data, int (*fn)(struct device *, void *));
+struct device * driver_find_device(struct device_driver *drv,
+ struct device *start, void *data,
+ int (*match)(struct device *, void *));
/*