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[S390] cio: always query all paths on path verification.

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Reappearing channel paths are sometimes not utilized by CCW devices
because path verification incorrectly relies on path-operational-mask
information which is not updated until a channel path has been used
again.
Modify path verification procedure to always query all available paths
to a device.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter
2006-09-20 15:59:59 +02:00
committed by Martin Schwidefsky
parent e0e32c8eba
commit 28bdc6f623
5 changed files with 68 additions and 61 deletions
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drivers/s390/cio/cio.c
+1 -4
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@@ -569,10 +569,7 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
sch->opm = 0xff;
if (!cio_is_console(sch->schid))
chsc_validate_chpids(sch);
sch->lpm = sch->schib.pmcw.pim &
sch->schib.pmcw.pam &
sch->schib.pmcw.pom &
sch->opm;
sch->lpm = sch->schib.pmcw.pam & sch->opm;
CIO_DEBUG(KERN_INFO, 0,
"Detected device %04x on subchannel 0.%x.%04X"