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-rw-r--r--backends/tpm.c3
-rw-r--r--hw/tpm/tpm_tis.c4
-rw-r--r--include/sysemu/tpm_backend.h3
3 files changed, 5 insertions, 5 deletions
diff --git a/backends/tpm.c b/backends/tpm.c
index 58f823d54c..7b108bd5d8 100644
--- a/backends/tpm.c
+++ b/backends/tpm.c
@@ -54,9 +54,10 @@ enum TpmType tpm_backend_get_type(TPMBackend *s)
return k->type;
}
-int tpm_backend_init(TPMBackend *s, TPMIf *tpmif)
+int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp)
{
if (s->tpmif) {
+ error_setg(errp, "TPM backend '%s' is already initialized", s->id);
return -1;
}
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 95d3afca1d..bf291e6eff 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -1074,9 +1074,7 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp)
s->be_driver->fe_model = TPM_MODEL_TPM_TIS;
- if (tpm_backend_init(s->be_driver, TPM_IF(s))) {
- error_setg(errp, "tpm_tis: backend driver with id %s could not be "
- "initialized", s->backend);
+ if (tpm_backend_init(s->be_driver, TPM_IF(s), errp)) {
return;
}
diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
index c5d1a6818a..df9ebd0e81 100644
--- a/include/sysemu/tpm_backend.h
+++ b/include/sysemu/tpm_backend.h
@@ -99,12 +99,13 @@ enum TpmType tpm_backend_get_type(TPMBackend *s);
* @s: the backend to initialized
* @tpmif: TPM interface
* @datacb: callback for sending data to frontend
+ * @errp: a pointer to return the #Error object if an error occurs.
*
* Initialize the backend with the given variables.
*
* Returns 0 on success.
*/
-int tpm_backend_init(TPMBackend *s, TPMIf *tpmif);
+int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp);
/**
* tpm_backend_startup_tpm: