AT_XDMAC_GS
while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
atxdmac->save_gs = at_xdmac_read(atxdmac, AT_XDMAC_GS);
ret = !!(at_xdmac_chan_read(atchan, AT_XDMAC_GS) & atchan->mask);
while (at_xdmac_read(atxdmac, AT_XDMAC_GS))