has_msg
bool has_msg;
sess_data->has_msg = false;
sess_data->has_msg = true;
if (!sess_data->has_msg)
sess_data->has_msg = false;
if (ff->spec->protocol->has_msg)
return ff->spec->protocol->has_msg(ff);
while (!ff->dev_lock_changed && !has_msg(ff)) {
} else if (has_msg(ff)) {
if (ff->dev_lock_changed || has_msg(ff))
.has_msg = ff400_has_msg,
bool (*has_msg)(struct snd_ff *ff);