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[S390] cio: ccw group fix unbind behaviour.

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For a ccw group device unbinding it from its driver should do the
same as a call to ungroup, since this virtual device can not exist
without a driver.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2009-03-26 15:24:15 +01:00 committed by Martin Schwidefsky
parent 50f1548399
commit e909074bb9
1 changed files with 36 additions and 6 deletions
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42
drivers/s390/cio/ccwgroup.c
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@ -314,16 +314,32 @@ error:
}
EXPORT_SYMBOL(ccwgroup_create_from_string);
static int __init
init_ccwgroup (void)
static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
void *data);
static struct notifier_block ccwgroup_nb = {
.notifier_call = ccwgroup_notifier
};
static int __init init_ccwgroup(void)
{
return bus_register (&ccwgroup_bus_type);
int ret;
ret = bus_register(&ccwgroup_bus_type);
if (ret)
return ret;
ret = bus_register_notifier(&ccwgroup_bus_type, &ccwgroup_nb);
if (ret)
bus_unregister(&ccwgroup_bus_type);
return ret;
}
static void __exit
cleanup_ccwgroup (void)
static void __exit cleanup_ccwgroup(void)
{
bus_unregister (&ccwgroup_bus_type);
bus_unregister_notifier(&ccwgroup_bus_type, &ccwgroup_nb);
bus_unregister(&ccwgroup_bus_type);
}
module_init(init_ccwgroup);
@ -455,6 +471,7 @@ ccwgroup_remove (struct device *dev)
struct ccwgroup_driver *gdrv;
device_remove_file(dev, &dev_attr_online);
device_remove_file(dev, &dev_attr_ungroup);
if (!dev->driver)
return 0;
@ -492,6 +509,19 @@ static struct bus_type ccwgroup_bus_type = {
.shutdown = ccwgroup_shutdown,
};
static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
void *data)
{
struct device *dev = data;
if (action == BUS_NOTIFY_UNBIND_DRIVER)
device_schedule_callback(dev, ccwgroup_ungroup_callback);
return NOTIFY_OK;
}
/**
* ccwgroup_driver_register() - register a ccw group driver
* @cdriver: driver to be registered