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[S390] pm: io subchannel driver power management callbacks 

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck 2009-06-16 10:30:23 +02:00 committed by Martin Schwidefsky
parent dcbd16d511
commit 93a275921d
1 changed files with 14 additions and 0 deletions
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14
drivers/s390/cio/device.c
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@ -138,6 +138,19 @@ static struct css_device_id io_subchannel_ids[] = {
}; };
MODULE_DEVICE_TABLE(css, io_subchannel_ids); MODULE_DEVICE_TABLE(css, io_subchannel_ids);
static int io_subchannel_prepare(struct subchannel *sch)
{
struct ccw_device *cdev;
/*
* Don't allow suspend while a ccw device registration
* is still outstanding.
*/
cdev = sch_get_cdev(sch);
if (cdev && !device_is_registered(&cdev->dev))
return -EAGAIN;
return 0;
}
static struct css_driver io_subchannel_driver = { static struct css_driver io_subchannel_driver = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.subchannel_type = io_subchannel_ids, .subchannel_type = io_subchannel_ids,
@ -148,6 +161,7 @@ static struct css_driver io_subchannel_driver = {
.probe = io_subchannel_probe, .probe = io_subchannel_probe,
.remove = io_subchannel_remove, .remove = io_subchannel_remove,
.shutdown = io_subchannel_shutdown, .shutdown = io_subchannel_shutdown,
.prepare = io_subchannel_prepare,
}; };
struct workqueue_struct *ccw_device_work; struct workqueue_struct *ccw_device_work;