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[S390] cio: introduce css_settle

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Introduce the css_driver callback settle which can be implemented
by a subchannel driver to wait for the subchannel type specific
asynchronous work to finish.
In channel_subsystem_init_sync we call that for each subchannel
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
2009-09-22 22:58:35 +02:00
committed by Martin Schwidefsky
parent 255305536c
commit 8ea7f55901
3 changed files with 25 additions and 12 deletions
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17
drivers/s390/cio/css.c
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@@ -1013,6 +1013,15 @@ static int __init channel_subsystem_init(void)
}
subsys_initcall(channel_subsystem_init);
static int css_settle(struct device_driver *drv, void *unused)
{
struct css_driver *cssdrv = to_cssdriver(drv);
if (cssdrv->settle)
cssdrv->settle();
return 0;
}
/*
* Wait for the initialization of devices to finish, to make sure we are
* done with our setup if the search for the root device starts.
@@ -1024,12 +1033,8 @@ static int __init channel_subsystem_init_sync(void)
/* Wait for the evaluation of subchannels to finish. */
wait_event(css_eval_wq, atomic_read(&css_eval_scheduled) == 0);
/* Wait for the initialization of ccw devices to finish. */
wait_event(ccw_device_init_wq,
atomic_read(&ccw_device_init_count) == 0);
flush_workqueue(ccw_device_work);
return 0;
/* Wait for the subchannel type specific initialization to finish */
return bus_for_each_drv(&css_bus_type, NULL, NULL, css_settle);
}
subsys_initcall_sync(channel_subsystem_init_sync);