diff options
| author | Cornelia Huck | 2006-12-08 15:54:28 +0100 |
|---|---|---|
| committer | Martin Schwidefsky | 2006-12-08 15:54:28 +0100 |
| commit | d7b5a4c94f49131811112526f7d404a50f0b5ca7 (patch) | |
| tree | 159cb6717e16339b821315c0bc6b17b6f5df5119 /drivers/s390/cio/device_fsm.c | |
| parent | [S390] subchannel lock conversion. (diff) | |
| download | kernel-qcow2-linux-d7b5a4c94f49131811112526f7d404a50f0b5ca7.tar.gz kernel-qcow2-linux-d7b5a4c94f49131811112526f7d404a50f0b5ca7.tar.xz kernel-qcow2-linux-d7b5a4c94f49131811112526f7d404a50f0b5ca7.zip | |
[S390] Support for disconnected devices reappearing on another subchannel.
- create a 'pseudo_subchannel' per channel subsystem (the 'orphanage')
- use the orphanage as a shelter for ccw_devices that can't remain on the same
subchannel
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_fsm.c')
| -rw-r--r-- | drivers/s390/cio/device_fsm.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index a487fb0e7d3d..eed14572fc3b 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -186,13 +186,12 @@ ccw_device_handle_oper(struct ccw_device *cdev) /* * Check if cu type and device type still match. If * not, it is certainly another device and we have to - * de- and re-register. Also check here for non-matching devno. + * de- and re-register. */ if (cdev->id.cu_type != cdev->private->senseid.cu_type || cdev->id.cu_model != cdev->private->senseid.cu_model || cdev->id.dev_type != cdev->private->senseid.dev_type || - cdev->id.dev_model != cdev->private->senseid.dev_model || - cdev->private->dev_id.devno != sch->schib.pmcw.dev) { + cdev->id.dev_model != cdev->private->senseid.dev_model) { PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unreg_rereg); queue_work(ccw_device_work, &cdev->private->kick_work); @@ -676,6 +675,10 @@ ccw_device_offline(struct ccw_device *cdev) { struct subchannel *sch; + if (ccw_device_is_orphan(cdev)) { + ccw_device_done(cdev, DEV_STATE_OFFLINE); + return 0; + } sch = to_subchannel(cdev->dev.parent); if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv) return -ENODEV; @@ -1121,7 +1124,13 @@ device_trigger_reprobe(struct subchannel *sch) sch->schib.pmcw.mp = 1; sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; /* We should also udate ssd info, but this has to wait. */ - ccw_device_start_id(cdev, 0); + /* Check if this is another device which appeared on the same sch. */ + if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) { + PREPARE_WORK(&cdev->private->kick_work, + ccw_device_move_to_orphanage); + queue_work(ccw_device_work, &cdev->private->kick_work); + } else + ccw_device_start_id(cdev, 0); } static void |