[PATCH v15 08/26] migration: push Error **errp into qemu_load_device_state()

[Arun Menon <armenon@redhat.com>]

This is an incremental step in converting vmstate loading
code to report error via Error objects instead of directly
printing it to console/monitor.
It is ensured that qemu_load_device_state() must report an error
in errp, in case of failure.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Tested-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Signed-off-by: Arun Menon <armenon@redhat.com>
---
 migration/colo.c   | 3 +--
 migration/savevm.c | 4 ++--
 migration/savevm.h | 2 +-
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/migration/colo.c b/migration/colo.c
index cf4d71d9edfa2a8a30e30e23ccbb3f72f402b6ae..a426ec5b60b8e929afe281c89be4e934fef40143 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -729,9 +729,8 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis,
     bql_lock();
     vmstate_loading = true;
     colo_flush_ram_cache();
-    ret = qemu_load_device_state(fb);
+    ret = qemu_load_device_state(fb, errp);
     if (ret < 0) {
-        error_setg(errp, "COLO: load device state failed");
         vmstate_loading = false;
         bql_unlock();
         return;
diff --git a/migration/savevm.c b/migration/savevm.c
index 88116ed278ae0e5c9b0dd055828ede69b0b876c9..9e30718995ec9a6dddcfb3dd9e9e1dc2d9d17aed 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -3264,7 +3264,7 @@ int qemu_loadvm_state(QEMUFile *f, Error **errp)
     return ret;
 }
 
-int qemu_load_device_state(QEMUFile *f)
+int qemu_load_device_state(QEMUFile *f, Error **errp)
 {
     MigrationIncomingState *mis = migration_incoming_get_current();
     int ret;
@@ -3272,7 +3272,7 @@ int qemu_load_device_state(QEMUFile *f)
     /* Load QEMU_VM_SECTION_FULL section */
     ret = qemu_loadvm_state_main(f, mis);
     if (ret < 0) {
-        error_report("Failed to load device state: %d", ret);
+        error_setg(errp, "Failed to load device state: %d", ret);
         return ret;
     }
 
diff --git a/migration/savevm.h b/migration/savevm.h
index b80770b7461a60e2ad6ba5e24a7baeae73d90955..b12681839f0b1afa3255e45215d99c13a224b19f 100644
--- a/migration/savevm.h
+++ b/migration/savevm.h
@@ -67,7 +67,7 @@ int qemu_save_device_state(QEMUFile *f);
 int qemu_loadvm_state(QEMUFile *f, Error **errp);
 void qemu_loadvm_state_cleanup(MigrationIncomingState *mis);
 int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis);
-int qemu_load_device_state(QEMUFile *f);
+int qemu_load_device_state(QEMUFile *f, Error **errp);
 int qemu_loadvm_approve_switchover(void);
 int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f,
         bool in_postcopy);

-- 
2.51.0