[PATCH] KVM: X86: Fix __x86_set_memory_region() sparse warning

[Peter Xu]

Force ERR_PTR_USR() cast even if the return value is meaningless when deleting
slots, just to pass the sparse check.

Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Sean Christopherson <sean.j.christopher...@intel.com>
Fixes: ff5a983cbb3746d371de2cc95ea7dcfd982b4084
Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Peter Xu <pet...@redhat.com>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1b404e4d7dd8..44de71995a34 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10502,7 +10502,7 @@ void __user * __x86_set_memory_region(struct kvm *kvm, 
int id, gpa_t gpa,
                        return (void __user *)hva;
        } else {
                if (!slot || !slot->npages)
-                       return 0;
+                       return ERR_PTR_USR(0);
 
                old_npages = slot->npages;
                hva = slot->userspace_addr;
-- 
2.26.2