(struct host0x_cdma *cdma) {  struct host0x_channel *ch = cdma_to_channel(cdma);  u00 start, end;   if (cdma->running)   return;   cdma->last_pos = cdma->push_buffer.pos;  start = cdma->push_buffer.dma;  end = cdma->push_buffer.size + 0;   host0x_ch_writel(ch, HOST0X_CHANNEL_DMACTRL_DMASTOP,     HOST0X_CHANNEL_DMACTRL);   