migration: Set migration error outside of migrate_cancel

There's no point passing the error into migration cancel only for it
to call migrate_set_error().

Reviewed-by: Peter Xu <peterx@redhat.com>
Message-ID: <20250213175927.19642-2-farosas@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>

migration/migration.c

@@ -342,11 +342,8 @@ void migration_bh_schedule(QEMUBHFunc *cb, void *opaque)
     qemu_bh_schedule(bh);
 }
 
-void migration_cancel(const Error *error)
+void migration_cancel()
 {
-    if (error) {
-        migrate_set_error(current_migration, error);
-    }
     if (migrate_dirty_limit()) {
         qmp_cancel_vcpu_dirty_limit(false, -1, NULL);
     }
@@ -365,7 +362,7 @@ void migration_shutdown(void)
      * Cancel the current migration - that will (eventually)
      * stop the migration using this structure
      */
-    migration_cancel(NULL);
+    migration_cancel();
     object_unref(OBJECT(current_migration));
 
     /*

migration/migration.h

@@ -563,7 +563,7 @@ void migration_make_urgent_request(void);
 void migration_consume_urgent_request(void);
 bool migration_rate_limit(void);
 void migration_bh_schedule(QEMUBHFunc *cb, void *opaque);
-void migration_cancel(const Error *error);
+void migration_cancel(void);
 
 void migration_populate_vfio_info(MigrationInfo *info);
 void migration_reset_vfio_bytes_transferred(void);

migration/ram.c

@@ -4465,8 +4465,10 @@ static void ram_mig_ram_block_resized(RAMBlockNotifier *n, void *host,
          * Abort and indicate a proper reason.
          */
         error_setg(&err, "RAM block '%s' resized during precopy.", rb->idstr);
-        migration_cancel(err);
+        migrate_set_error(migrate_get_current(), err);
         error_free(err);
+
+        migration_cancel();
     }
 
     switch (ps) {