diff options
| author | Christoffer Dall <christoffer.dall@linaro.org> | 2014-11-06 11:47:39 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-26 14:40:44 +0100 |
| commit | 6b50f54064a02b77a7b990032b80234fee59bcd6 (patch) | |
| tree | 8fd347d96d760a81c9e866b999a534ac89627a0d | |
| parent | db7dedd0de714a59d8fa2a1be3b6b00543ad415a (diff) | |
| download | lwn-6b50f54064a02b77a7b990032b80234fee59bcd6.tar.gz lwn-6b50f54064a02b77a7b990032b80234fee59bcd6.zip | |
arm/arm64: KVM: vgic: Fix error code in kvm_vgic_create()
If we detect another vCPU is running we just exit and return 0 as if we
succesfully created the VGIC, but the VGIC wouldn't actual be created.
This shouldn't break in-kernel behavior because the kernel will not
observe the failed the attempt to create the VGIC, but userspace could
be rightfully confused.
Cc: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | virt/kvm/arm/vgic.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 3aaca49de325..aacdb59f30de 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1933,7 +1933,7 @@ out: int kvm_vgic_create(struct kvm *kvm) { - int i, vcpu_lock_idx = -1, ret = 0; + int i, vcpu_lock_idx = -1, ret; struct kvm_vcpu *vcpu; mutex_lock(&kvm->lock); @@ -1948,6 +1948,7 @@ int kvm_vgic_create(struct kvm *kvm) * vcpu->mutex. By grabbing the vcpu->mutex of all VCPUs we ensure * that no other VCPUs are run while we create the vgic. */ + ret = -EBUSY; kvm_for_each_vcpu(i, vcpu, kvm) { if (!mutex_trylock(&vcpu->mutex)) goto out_unlock; @@ -1955,11 +1956,10 @@ int kvm_vgic_create(struct kvm *kvm) } kvm_for_each_vcpu(i, vcpu, kvm) { - if (vcpu->arch.has_run_once) { - ret = -EBUSY; + if (vcpu->arch.has_run_once) goto out_unlock; - } } + ret = 0; spin_lock_init(&kvm->arch.vgic.lock); kvm->arch.vgic.in_kernel = true; |