s390/kvm: remove explicit -EFAULT return code checking on guest access

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Let's change to the paradigm that every return code from guest memory
access functions that is not zero translates to -EFAULT and do not
explictly compare.
Explictly comparing the return value with -EFAULT has already shown to
be a bit fragile. In addition this is closer to the handling of
copy_to/from_user functions, which imho is in general a good idea.

Also shorten the return code handling in interrupt.c a bit.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

...

This commit is contained in:

Heiko Carstens 2013-03-05 13:14:43 +01:00 • committed by Marcelo Tosatti

parent 59a1fa2d80

commit dc5008b9bf

3 changed files with 74 additions and 177 deletions

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4

arch/s390/kvm/intercept.c

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241

arch/s390/kvm/interrupt.c

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6

arch/s390/kvm/priv.c

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