tree ce9a7843a2fa0ae9238fd0cf88dbeb0858283ff1
parent 0b601373778c770d7536b1d1761c3b2c06e4eb24
author Sebastian Ott <sebott@linux.vnet.ibm.com> 1466510348 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1468585920 +0200

s390/chsc: sanitize fmt check for chp_desc determination

When fetching channel path descriptors we've only evaluated the rfmt
parameter which could lead us to trigger the chsc even though the
machine doesn't support the specific format or to not trigger the
chsc and report a failure to userspace even though the machine would've
supported it.

Improve these checks and change the parameters of the in-kernel
user to be less confusing.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>