call_vb_qop
return ret ? ret : call_vb_qop(vb, buf_prepare, vb);
ret = call_vb_qop(vb, buf_init, vb);
ret = call_vb_qop(vb, buf_prepare, vb);
ret = call_vb_qop(vb, buf_init, vb);
ret = call_vb_qop(vb, buf_prepare, vb);
ret = call_vb_qop(vb, buf_out_validate, vb);
ret = call_vb_qop(vb, buf_out_validate, vb);
ret = call_vb_qop(vb, buf_init, vb);