From 6b50f54064a02b77a7b990032b80234fee59bcd6 Mon Sep 17 00:00:00 2001 From: Christoffer Dall Date: Thu, 6 Nov 2014 11:47:39 +0000 Subject: 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 Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Paolo Bonzini --- virt/kvm/arm/vgic.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'virt/kvm/arm') 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; -- cgit v1.2.3-59-g8ed1b