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KVM: s390: use created_vcpus in more places 

commit a03825bbd0 ("KVM: s390: use kvm->created_vcpus") introduced
kvm->created_vcpus to avoid races with the existing kvm->online_vcpus
scheme. One place was "forgotten" and one new place was "added".
Let's fix those.

Reported-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Fixes: 4e0b1ab72b ("KVM: s390: gs support for kvm guests")
Fixes: a03825bbd0 ("KVM: s390: use kvm->created_vcpus")
This commit is contained in:
Christian Borntraeger 2017-11-16 15:12:52 +01:00
parent 9696594158
commit 241e3ec0fa
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kvm/kvm-s390.c
View File

@ -573,7 +573,7 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
case KVM_CAP_S390_GS:
r = -EINVAL;
mutex_lock(&kvm->lock);
if (atomic_read(&kvm->online_vcpus)) {
if (kvm->created_vcpus) {
r = -EBUSY;
} else if (test_facility(133)) {
set_kvm_facility(kvm->arch.model.fac_mask, 133);
@ -1094,7 +1094,7 @@ static int kvm_s390_set_processor_feat(struct kvm *kvm,
return -EINVAL;
mutex_lock(&kvm->lock);
if (!atomic_read(&kvm->online_vcpus)) {
if (!kvm->created_vcpus) {
bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
KVM_S390_VM_CPU_FEAT_NR_BITS);
ret = 0;