KVM: arm64: Fix __pkvm_host_mkyoung_guest() return value

Don't use an uninitialised stack variable, and just return 0
on the non-error path.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502100911.8c9DbtKD-lkp@intel.com/
Reviewed-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
index 4c2f6a6a2efe1fe81edd57cba083dd369a51457f..19c3c631708ce389704ad293cb2ec347735afa85 100644 (file)
--- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c
+++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
@@ -1073,7 +1073,6 @@ int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu)
 {
        struct pkvm_hyp_vm *vm = pkvm_hyp_vcpu_to_hyp_vm(vcpu);
        u64 ipa = hyp_pfn_to_phys(gfn);
-       int ret;
 
        if (pkvm_hyp_vm_is_protected(vm))
                return -EPERM;
@@ -1083,5 +1082,5 @@ int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu)
        kvm_pgtable_stage2_mkyoung(&vm->pgt, ipa, 0);
        guest_unlock_component(vm);
 
-       return ret;
+       return 0;
 }