diff options
| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2009-06-16 10:30:23 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-16 10:31:09 +0200 |
| commit | 93a275921daf83e6e4efbafdd82712bcaa93f491 (patch) | |
| tree | cdab651b0204c0cdeb5731b9f312ff407d821098 /drivers/s390/cio | |
| parent | dcbd16d5111258df7c821ec1e4124fe6ffbf3c16 (diff) | |
[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>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/device.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 228a6c314d8..64bd79ac25a 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; |