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migration: allow cancel to unpause 

If a migration_cancel is issued during the new paused state,
kick the pause_sem to get to unpause so it can cancel.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2017-10-20 10:05:55 +01:00 committed by Juan Quintela
parent 94ae12cba4
commit a7b36b486d
1 changed files with 4 additions and 0 deletions
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4
migration/migration.c
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@ -1114,6 +1114,10 @@ static void migrate_fd_cancel(MigrationState *s)
if (!migration_is_setup_or_active(old_state)) {
break;
}
/* If the migration is paused, kick it out of the pause */
if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) {
qemu_sem_post(&s->pause_sem);
}
migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING);
} while (s->state != MIGRATION_STATUS_CANCELLING);