Commit 95d69539a4 for qemu.org

commit 95d69539a4d29b3533f6f3c6807fa918a835d6e2
Author: Marc-André Lureau <marcandre.lureau@redhat.com>
Date:   Thu Jan 8 15:03:10 2026 -0800

    qdev: make release_tpm() idempotent

    So it can eventually be called multiple times safely.

    Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
    Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
    Link: https://lore.kernel.org/r/20250429140306.190384-4-marcandre.lureau@redhat.com
    Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
    Link: https://lore.kernel.org/r/20260108230311.584141-5-csomani@redhat.com
    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/backends/tpm/tpm_util.c b/backends/tpm/tpm_util.c
index a64e156f45..264bff22a9 100644
--- a/backends/tpm/tpm_util.c
+++ b/backends/tpm/tpm_util.c
@@ -72,6 +72,7 @@ static void release_tpm(Object *obj, const char *name, void *opaque)

     if (*be) {
         tpm_backend_reset(*be);
+        *be = NULL;
     }
 }