[PATCH v7 12/17] KVM: s390: pv: refactoring of kvm_s390_pv_deinit_vm

Claudio Imbrenda
2022-02-04T15:54:16Z

Refactor kvm_s390_pv_deinit_vm to improve readability and simplify the
improvements that are coming in subsequent patches.

No functional change intended.

[note: this can potentially be squashed into the next patch, I factored
it out to simplify the review process]

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
arch/s390/kvm/pv.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c
index d3b8fd9b5b3e..4e4728ec83a7 100644
--- a/arch/s390/kvm/pv.c
+++ b/arch/s390/kvm/pv.c
@@ -180,17 +180,17 @@ int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc)
cc = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
UVC_CMD_DESTROY_SEC_CONF, rc, rrc);
WRITE_ONCE(kvm->arch.gmap->guest_handle, 0);
- if (!cc)
- atomic_dec(&kvm->mm->context.protected_count);
- KVM_UV_EVENT(kvm, 3, "PROTVIRT DESTROY VM: rc %x rrc %x", *rc, *rrc);
- WARN_ONCE(cc, "protvirt destroy vm failed rc %x rrc %x", *rc, *rrc);
- /* Intended memory leak on "impossible" error */
if (!cc) {
+ atomic_dec(&kvm->mm->context.protected_count);
kvm_s390_pv_dealloc_vm(kvm);
- return 0;
+ } else {
+ /* Intended memory leak on "impossible" error */
+ s390_replace_asce(kvm->arch.gmap);
}
- s390_replace_asce(kvm->arch.gmap);
- return -EIO;
+ KVM_UV_EVENT(kvm, 3, "PROTVIRT DESTROY VM: rc %x rrc %x", *rc, *rrc);
+ WARN_ONCE(cc, "protvirt destroy vm failed rc %x rrc %x", *rc, *rrc);
+
+ return cc ? -EIO : 0;
}

static void kvm_s390_pv_mmu_notifier_release(struct mmu_notifier *subscription,
--
2.34.1