From 93a275921daf83e6e4efbafdd82712bcaa93f491 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Tue, 16 Jun 2009 10:30:23 +0200 Subject: [S390] pm: io subchannel driver power management callbacks Signed-off-by: Cornelia Huck Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/s390/cio') diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 228a6c314d84..64bd79ac25a7 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -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; -- cgit v1.2.3