ChangeSet 1.1784.12.5, 2004/07/08 16:46:47-07:00, dtor_core@ameritech.net [PATCH] Driver core: add driver_find helper to find a driver by its name Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman drivers/base/driver.c | 19 +++++++++++++++++++ include/linux/device.h | 1 + 2 files changed, 20 insertions(+) diff -Nru a/drivers/base/driver.c b/drivers/base/driver.c --- a/drivers/base/driver.c 2004-07-14 17:11:24 -07:00 +++ b/drivers/base/driver.c 2004-07-14 17:11:24 -07:00 @@ -111,10 +111,29 @@ up(&drv->unload_sem); } +/** + * driver_find - locate driver on a bus by its name. + * @name: name of the driver. + * @bus: bus to scan for the driver. + * + * Call kset_find_obj() to iterate over list of drivers on + * a bus to find driver by name. Return driver if found. + * + * Note that kset_find_obj increments driver's reference count. + */ +struct device_driver *driver_find(const char *name, struct bus_type *bus) +{ + struct kobject *k = kset_find_obj(&bus->drivers, name); + if (k) + return to_drv(k); + return NULL; +} + EXPORT_SYMBOL(driver_register); EXPORT_SYMBOL(driver_unregister); EXPORT_SYMBOL(get_driver); EXPORT_SYMBOL(put_driver); +EXPORT_SYMBOL(driver_find); EXPORT_SYMBOL(driver_create_file); EXPORT_SYMBOL(driver_remove_file); diff -Nru a/include/linux/device.h b/include/linux/device.h --- a/include/linux/device.h 2004-07-14 17:11:24 -07:00 +++ b/include/linux/device.h 2004-07-14 17:11:24 -07:00 @@ -120,6 +120,7 @@ extern struct device_driver * get_driver(struct device_driver * drv); extern void put_driver(struct device_driver * drv); +extern struct device_driver *driver_find(const char *name, struct bus_type *bus); /* driverfs interface for exporting driver attributes */