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| author |   Cornelia Huck <cornelia.huck@de.ibm.com> | 2006-07-12 16:40:19 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-07-12 16:40:19 +0200 |
| commit | 7e560814de1972e1bfc780616841d7a0032ca467 (patch) | |
| tree | f8d544454b54a0167f757cc945a3e29165f211f8 /drivers/s390/cio/device_status.c | |
| parent | [S390] xpram module parameter parsing. (diff) | |
| download | linux-dev-7e560814de1972e1bfc780616841d7a0032ca467.tar.xz linux-dev-7e560814de1972e1bfc780616841d7a0032ca467.zip | |
[S390] path grouping and path verifications fixes.
1. Multipath devices for which SetPGID is not supported are not handled well.
Use NOP ccws for path verification (sans path grouping) when SetPGID is not
supported.
2. Check for PGIDs already set with SensePGID on _all_ paths (not just the
first one) and try to find a common one. Moan if no common PGID can be
found (and use NOP verification). If no PGIDs have been set, use the css
global PGID (as before). (Rationale: SetPGID will get a command reject if
the PGID it tries to set does not match the already set PGID.)
3. Immediately before reboot, issue RESET CHANNEL PATH (rcp) on all chpids. This
will remove the old PGIDs. rcp will generate solicited CRWs which can be
savely ignored by the machine check handler (all other actions create
unsolicited CRWs).
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_status.c')
| -rw-r--r-- | drivers/s390/cio/device_status.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c index 14bef2c179bf..caf148d5caad 100644 --- a/drivers/s390/cio/device_status.c +++ b/drivers/s390/cio/device_status.c @@ -67,8 +67,7 @@ ccw_device_path_notoper(struct ccw_device *cdev) sch->schib.pmcw.pnom); sch->lpm &= ~sch->schib.pmcw.pnom; - if (cdev->private->options.pgroup) - cdev->private->flags.doverify = 1; + cdev->private->flags.doverify = 1; } /* @@ -180,7 +179,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) cdev_irb->esw.esw0.erw.auth = irb->esw.esw0.erw.auth; /* Copy path verification required flag. */ cdev_irb->esw.esw0.erw.pvrf = irb->esw.esw0.erw.pvrf; - if (irb->esw.esw0.erw.pvrf && cdev->private->options.pgroup) + if (irb->esw.esw0.erw.pvrf) cdev->private->flags.doverify = 1; /* Copy concurrent sense bit. */ cdev_irb->esw.esw0.erw.cons = irb->esw.esw0.erw.cons; @@ -354,7 +353,7 @@ ccw_device_accumulate_basic_sense(struct ccw_device *cdev, struct irb *irb) } /* Check if path verification is required. */ if (ccw_device_accumulate_esw_valid(irb) && - irb->esw.esw0.erw.pvrf && cdev->private->options.pgroup) + irb->esw.esw0.erw.pvrf) cdev->private->flags.doverify = 1; } |