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KVM: s390: only reset CMMA state if it was enabled before 

There is no point in resetting the CMMA state if it was never enabled.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Dominik Dingel 2015-06-18 13:17:11 +02:00 committed by Christian Borntraeger
parent e6db1d61c7
commit c348915585
1 changed files with 4 additions and 0 deletions
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4
arch/s390/kvm/kvm-s390.c
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@ -344,6 +344,10 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
mutex_unlock(&kvm->lock);
break;
case KVM_S390_VM_MEM_CLR_CMMA:
ret = -EINVAL;
if (!kvm->arch.use_cmma)
break;
mutex_lock(&kvm->lock);
idx = srcu_read_lock(&kvm->srcu);
s390_reset_cmma(kvm->arch.gmap->mm);