s390/zcrypt: Fix ap_max_domain_id for older machine types

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According to the system architecture the current implementation
requires the presence of the N bit in GR2 in the TAPQ response
field to validate the max. number of domains (Nd).
Older machine types don't have this N bit, hence the max. domain
field was ignored.

Before the N bit was introduced the maximum number of domain was
a constant value of 15. So set this value in case of N bit absence.

Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Ingo Tuchscherer 2016-11-02 10:23:24 +01:00 • committed by Martin Schwidefsky

parent 148784246e

commit c1c1368de4

1 changed files with 3 additions and 0 deletions

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drivers/s390/crypto/ap_bus.c

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