Commit 93a27592 authored by Cornelia Huck's avatar Cornelia Huck Committed by Martin Schwidefsky
Browse files

[S390] pm: io subchannel driver power management callbacks


Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent dcbd16d5
......@@ -138,6 +138,19 @@ static struct css_device_id 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 = {
.owner = THIS_MODULE,
.subchannel_type = io_subchannel_ids,
......@@ -148,6 +161,7 @@ static struct css_driver io_subchannel_driver = {
.probe = io_subchannel_probe,
.remove = io_subchannel_remove,
.shutdown = io_subchannel_shutdown,
.prepare = io_subchannel_prepare,
};
struct workqueue_struct *ccw_device_work;
......
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