[PATCHv2 7/7] KVM: PPC: Book3s: nestedv2: Free the guest state buffers if vcpu create fails

["Ritesh Harjani (IBM)" <ritesh.list@gmail.com>]

On a nestedv2 host, kvmppc_core_vcpu_create_hv() first creates the vCPU
in the L0 with kvmhv_nestedv2_vcpu_create(), which also allocates the
guest state messages and the run input/output buffers. Only after that
it picks a vcore for the vCPU - which can actually fail.

This patch therefore takes care of freeing the GSM abd GSB for nestedv2
if an error occurs later as part of the cleanup routine.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
 arch/powerpc/kvm/book3s_hv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 7975e5de89d0..a242abaea357 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3099,8 +3099,11 @@ static int kvmppc_core_vcpu_create_hv(struct kvm_vcpu *vcpu)
 		}
 	}
 
-	if (!vcore)
+	if (!vcore) {
+		if (kvmhv_is_nestedv2())
+			kvmhv_nestedv2_vcpu_free(vcpu, &vcpu->arch.nestedv2_io);
 		return err;
+	}
 
 	spin_lock(&vcore->lock);
 	++vcore->num_threads;
-- 
2.39.5