Commit c3489155 authored Jun 18, 2015 by Dominik Dingel Committed by Christian Borntraeger Jul 29, 2015

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>

parent e6db1d61

arch/s390/kvm/kvm-s390.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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);