diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2008-12-25 13:39:13 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:39:10 +0100 |
| commit | 13952ec12dfeea793ff83c2a96139ed57eb0b897 (patch) | |
| tree | 3311df62a1794bf95f78b2c57f25f0a79dc84523 /drivers/s390/cio/device.h | |
| parent | cdb912a40df8b8507ab60b3d52f9980c0ba1f44d (diff) | |
[S390] cio: introduce cio_commit_config
To change the configuration of a subchannel we alter the modifiable
bits of the subchannel's schib field and issue a modify subchannel.
There can be the case that not all changes were applied -or worse-
quietly overwritten by the hardware. With the next store subchannel
we obtain the current state of the hardware but lose our target
configuration.
With this patch we introduce a subchannel_config structure which
contains the target subchannel configuration. Additionally the msch
wrapper cio_modify is replaced with cio_commit_config which
copies the desired changes to a temporary schib. msch is then
called with the temporary schib. This schib is only written back
to the subchannel if all changes were applied.
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/device.h')
| -rw-r--r-- | drivers/s390/cio/device.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h index 104ed669db4..0f2e63ea48d 100644 --- a/drivers/s390/cio/device.h +++ b/drivers/s390/cio/device.h @@ -76,6 +76,7 @@ extern wait_queue_head_t ccw_device_init_wq; extern atomic_t ccw_device_init_count; void io_subchannel_recog_done(struct ccw_device *cdev); +void io_subchannel_init_config(struct subchannel *sch); int ccw_device_cancel_halt_clear(struct ccw_device *); |