tree c04f74a8b1f3b35c489bbcdccdb56bbfb4f98b24
parent 44e8967d591686463e84a88b46b03beba3ab49fb
author Harald Freudenberger <freude@linux.vnet.ibm.com> 1418203439 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1418892955 +0100

s390/zcrypt: kernel oops at insmod of the z90crypt device driver

Kernel oops caused by invalid parameter at TAPQ instruction:
On older systems where the QCI instruction is not available
all possible domains are probed via TAPQ instruction. The
range for the probe has been extended with the > 16 domain
support now leading to a possible specification exception
when this instruction is called for probing higher values
within the new range. This may happen during insmod and/or
ap bus reset only on machines without a QCI instruction (z10,
z196, z114), zEC12 and newer systems are not affected.
The fix modifies the domain checking function to limit the
allowed range if no QCI info is available.

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