tpm: Clean up error reporting in tpm_init_tpmdev()

Calling error_report() in a function that takes an Error ** argument
is suspicious.  tpm_init_tpmdev() does that, and then fails without
setting an error.  Its caller main(), via tpm_init() and
qemu_opts_foreach(), is fine with it, but clean it up anyway.

Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20181017082702.5581-30-armbru@redhat.com>

include/sysemu/tpm.h

@@ -16,7 +16,7 @@
 #include "qom/object.h"
 
 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
-int tpm_init(void);
+void tpm_init(void);
 void tpm_cleanup(void);
 
 typedef enum TPMVersion {

stubs/tpm.c

@@ -9,9 +9,8 @@
 #include "qapi/qapi-commands-tpm.h"
 #include "sysemu/tpm.h"
 
-int tpm_init(void)
+void tpm_init(void)
 {
-    return 0;
 }
 
 void tpm_cleanup(void)

tpm.c

@@ -89,36 +89,36 @@ static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
     int i;
 
     if (!QLIST_EMPTY(&tpm_backends)) {
-        error_report("Only one TPM is allowed.");
+        error_setg(errp, "Only one TPM is allowed.");
         return 1;
     }
 
     id = qemu_opts_id(opts);
     if (id == NULL) {
-        error_report(QERR_MISSING_PARAMETER, "id");
+        error_setg(errp, QERR_MISSING_PARAMETER, "id");
         return 1;
     }
 
     value = qemu_opt_get(opts, "type");
     if (!value) {
-        error_report(QERR_MISSING_PARAMETER, "type");
+        error_setg(errp, QERR_MISSING_PARAMETER, "type");
         tpm_display_backend_drivers();
         return 1;
     }
 
     i = qapi_enum_parse(&TpmType_lookup, value, -1, NULL);
     be = i >= 0 ? tpm_be_find_by_type(i) : NULL;
     if (be == NULL) {
-        error_report(QERR_INVALID_PARAMETER_VALUE,
-                     "type", "a TPM backend type");
+        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+                   "a TPM backend type");
         tpm_display_backend_drivers();
         return 1;
     }
 
     /* validate backend specific opts */
     qemu_opts_validate(opts, be->opts, &local_err);
     if (local_err) {
-        error_report_err(local_err);
+        error_propagate(errp, local_err);
         return 1;
     }
 
@@ -151,14 +151,10 @@ void tpm_cleanup(void)
  * Initialize the TPM. Process the tpmdev command line options describing the
  * TPM backend.
  */
-int tpm_init(void)
+void tpm_init(void)
 {
-    if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
-                          tpm_init_tpmdev, NULL, NULL)) {
-        return -1;
-    }
-
-    return 0;
+    qemu_opts_foreach(qemu_find_opts("tpmdev"),
+                      tpm_init_tpmdev, NULL, &error_fatal);
 }
 
 /*

vl.c

@@ -4360,9 +4360,7 @@ int main(int argc, char **argv, char **envp)
                       user_creatable_add_opts_foreach,
                       object_create_delayed, &error_fatal);
 
-    if (tpm_init() < 0) {
-        exit(1);
-    }
+    tpm_init();
 
     /* init the bluetooth world */
     if (foreach_device_config(DEV_BT, bt_parse))