s390/cio: Fix cio_update_schib() to not cache invalid schib

Browse source

When pmcw.dnv is 0, the contents of all SCHIB fields are unpredictable.
Zero sch->schib in that case to prevent subsequent code from making
decisions based on unpredictable data.

Reported-by: William Bezenah <wbezenah@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Fixes: 8c58a22968 ("s390/cio: Do not unregister the subchannel based on DNV")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

This commit is contained in:

Vineeth Vijayan 2026-09-10 11:32:01 +02:00 • committed by Heiko Carstens

parent 4525a91104

commit 29d9e5835d

1 changed files with 7 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

11

drivers/s390/cio/cio.c

View file