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| 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 /security | |
| parent | [S390] cio: introduce cio_update_schib (diff) | |
| download | linux-13952ec12dfeea793ff83c2a96139ed57eb0b897.tar.xz linux-13952ec12dfeea793ff83c2a96139ed57eb0b897.zip | |
[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 'security')
0 files changed, 0 insertions, 0 deletions