migration/multifd: Change multifd_load_cleanup() signature and usage

Since it's introduction in commit f986c3d256 ("migration: Create multifd
migration threads"), multifd_load_cleanup() never returned any value
different than 0, neither set up any error on errp.

Even though, on process_incoming_migration_bh() an if clause uses it's
return value to decide on setting autostart = false, which will never
happen.

In order to simplify the codebase, change multifd_load_cleanup() signature
to 'void multifd_load_cleanup(void)', and for every usage remove error
handling or decision made based on return value != 0.

Fixes: b5eea99ec2 ("migration: Add yank feature")
Reported-by: Li Xiaohui <xiaohli@redhat.com>
Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/migration/multifd.c b/migration/multifd.c
index 99a5983..cac8496 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -1013,12 +1013,12 @@ static void multifd_recv_terminate_threads(Error *err)
     }
 }
 
-int multifd_load_cleanup(Error **errp)
+void multifd_load_cleanup(void)
 {
     int i;
 
     if (!migrate_use_multifd()) {
-        return 0;
+        return;
     }
     multifd_recv_terminate_threads(NULL);
     for (i = 0; i < migrate_multifd_channels(); i++) {
@@ -1058,8 +1058,6 @@ int multifd_load_cleanup(Error **errp)
     multifd_recv_state->params = NULL;
     g_free(multifd_recv_state);
     multifd_recv_state = NULL;
-
-    return 0;
 }
 
 void multifd_recv_sync_main(void)