driver core: move driver_find() to bus.c

This function really is a bus function, not a driver one, so move it from driver.c to bus.c so that we can clean up some internal bus logic easier.

Greg Kroah-Hartman committed 3 years ago

Commit adc18501 parent b5aaecb2 files · +27 −27Browse files

Showing the changes to drivers (2 of 2 files). Show all

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@@ -1288,6 +1288,33 @@ int subsys_virtual_register(struct bus_type *subsys, · 1287 unmodified lines
1288	}	1288	}
1289	EXPORT_SYMBOL_GPL(subsys_virtual_register);	1289	EXPORT_SYMBOL_GPL(subsys_virtual_register);
1290		1290
		1291	/**
		1292	* driver_find - locate driver on a bus by its name.
		1293	* @name: name of the driver.
		1294	* @bus: bus to scan for the driver.
		1295	*
		1296	* Call kset_find_obj() to iterate over list of drivers on
		1297	* a bus to find driver by name. Return driver if found.
		1298	*
		1299	* This routine provides no locking to prevent the driver it returns
		1300	* from being unregistered or unloaded while the caller is using it.
		1301	* The caller is responsible for preventing this.
		1302	*/
		1303	struct device_driver driver_find(const char name, struct bus_type *bus)
		1304	{
		1305	struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
		1306	struct driver_private *priv;
		1307
		1308	if (k) {
		1309	/* Drop reference added by kset_find_obj() */
		1310	kobject_put(k);
		1311	priv = to_driver(k);
		1312	return priv->driver;
		1313	}
		1314	return NULL;
		1315	}
		1316	EXPORT_SYMBOL_GPL(driver_find);
		1317
1291	int __init buses_init(void)	1318	int __init buses_init(void)
1292	{	1319	{
1293	bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);	1320	bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);

@@ -274,30 +274,3 @@ void driver_unregister(struct device_driver *drv) · 273 unmodified lines
274	bus_remove_driver(drv);	274	bus_remove_driver(drv);
275	}	275	}
276	EXPORT_SYMBOL_GPL(driver_unregister);	276	EXPORT_SYMBOL_GPL(driver_unregister);
277
278	/**
279	* driver_find - locate driver on a bus by its name.
280	* @name: name of the driver.
281	* @bus: bus to scan for the driver.
282	*
283	* Call kset_find_obj() to iterate over list of drivers on
284	* a bus to find driver by name. Return driver if found.
285	*
286	* This routine provides no locking to prevent the driver it returns
287	* from being unregistered or unloaded while the caller is using it.
288	* The caller is responsible for preventing this.
289	*/
290	struct device_driver driver_find(const char name, struct bus_type *bus)
291	{
292	struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
293	struct driver_private *priv;
294
295	if (k) {
296	/* Drop reference added by kset_find_obj() */
297	kobject_put(k);
298	priv = to_driver(k);
299	return priv->driver;
300	}
301	return NULL;
302	}
303	EXPORT_SYMBOL_GPL(driver_find);