forked from luck/tmp_suning_uos_patched
driver core: Introduce default attribute groups.
This is lot like default attributes for devices (and indeed, a lot of the code is lifted from there). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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2b93730318
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57c745340a
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@ -142,6 +142,37 @@ void put_driver(struct device_driver * drv)
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kobject_put(&drv->kobj);
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}
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static int driver_add_groups(struct device_driver *drv,
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struct attribute_group **groups)
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{
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int error = 0;
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int i;
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if (groups) {
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for (i = 0; groups[i]; i++) {
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error = sysfs_create_group(&drv->kobj, groups[i]);
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if (error) {
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while (--i >= 0)
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sysfs_remove_group(&drv->kobj,
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groups[i]);
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break;
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}
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}
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}
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return error;
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}
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static void driver_remove_groups(struct device_driver *drv,
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struct attribute_group **groups)
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{
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int i;
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if (groups)
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for (i = 0; groups[i]; i++)
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sysfs_remove_group(&drv->kobj, groups[i]);
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}
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/**
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* driver_register - register driver with bus
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* @drv: driver to register
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@ -152,13 +183,21 @@ void put_driver(struct device_driver * drv)
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*/
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int driver_register(struct device_driver * drv)
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{
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int ret;
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if ((drv->bus->probe && drv->probe) ||
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(drv->bus->remove && drv->remove) ||
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(drv->bus->shutdown && drv->shutdown)) {
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printk(KERN_WARNING "Driver '%s' needs updating - please use bus_type methods\n", drv->name);
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}
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klist_init(&drv->klist_devices, NULL, NULL);
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return bus_add_driver(drv);
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ret = bus_add_driver(drv);
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if (ret)
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return ret;
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ret = driver_add_groups(drv, drv->groups);
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if (ret)
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bus_remove_driver(drv);
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return ret;
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}
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/**
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@ -170,6 +209,7 @@ int driver_register(struct device_driver * drv)
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void driver_unregister(struct device_driver * drv)
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{
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driver_remove_groups(drv, drv->groups);
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bus_remove_driver(drv);
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}
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@ -129,6 +129,7 @@ struct device_driver {
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void (*shutdown) (struct device * dev);
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int (*suspend) (struct device * dev, pm_message_t state);
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int (*resume) (struct device * dev);
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struct attribute_group **groups;
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};
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