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tpm-backend: store TPMIf interface, improve backend_init()

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Store the TPM interface, the actual object may be different from
TPMState. Keep a reference on the interface, and check the backend
wasn't already initialized.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Marc-André Lureau 2017-11-06 19:39:00 +01:00 • committed by Stefan Berger
parent 67af320cd6
commit 8a89c9ac15
6 changed files with 18 additions and 11 deletions
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11
backends/tpm.c
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@ -43,9 +43,15 @@ enum TpmType tpm_backend_get_type(TPMBackend *s)
return k->type;
}
int tpm_backend_init(TPMBackend *s, TPMState *state)
int tpm_backend_init(TPMBackend *s, TPMIf *tpmif)
{
s->tpm_state = state;
if (s->tpmif) {
return -1;
}
s->tpmif = tpmif;
object_ref(OBJECT(tpmif));
s->had_startup_error = false;
return 0;
@ -193,6 +199,7 @@ static void tpm_backend_instance_finalize(Object *obj)
{
TPMBackend *s = TPM_BACKEND(obj);
object_unref(OBJECT(s->tpmif));
g_free(s->id);
tpm_backend_thread_end(s);
}