DMA_IRQ_CHAN_NR
#define DMA_MAX_CHANNELS (DMA_IRQ_CHAN_NR * 0x10 / 4)
irq_reg = pchan->idx / DMA_IRQ_CHAN_NR;
irq_offset = pchan->idx % DMA_IRQ_CHAN_NR;
for (i = 0; i < sdev->num_pchans / DMA_IRQ_CHAN_NR; i++) {
for (j = 0; (j < DMA_IRQ_CHAN_NR) && status; j++) {