KVM: PPC: Book3S HV: Allow DTL to be set to address 0, length 0

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Commit 55b665b026 ("KVM: PPC: Book3S HV: Provide a way for userspace
to get/set per-vCPU areas") includes a check on the length of the
dispatch trace log (DTL) to make sure the buffer is at least one entry
long.  This is appropriate when registering a buffer, but the
interface also allows for any existing buffer to be unregistered by
specifying a zero address.  In this case the length check is not
appropriate.  This makes the check conditional on the address being
non-zero.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

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Paul Mackerras 2012-10-15 01:18:37 +00:00 • committed by Alexander Graf

parent c7b676709c

commit 9f8c8c7812

1 changed files with 2 additions and 3 deletions

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arch/powerpc/kvm/book3s_hv.c

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