Chanho Park wrote: > > Kukjin Kim <kgene.kim <at> samsung.com> writes: > > (snip) > > > + if (slave_config->direction == DMA_TO_DEVICE) { > > + if (slave_config->dst_addr) > > + peri->fifo_addr = slave_config->dst_addr; > > + if (slave_config->dst_addr_width) { > > + i = 0; > > + while (slave_config->dst_addr_width != (1 << > i)) > > + i++; > > + peri->burst_sz = i; > > + } > > + } else if (slave_config->direction == DMA_FROM_DEVICE) { > > + if (slave_config->src_addr) > > + peri->fifo_addr = slave_config->src_addr; > > + if (slave_config->src_addr_width) { > > + i = 0; > > + while (slave_config->src_addr_width != (1 << > i)) > > + i++; > > + peri->burst_sz = i; > > Re-send including cc and mailing lists > -- > pl330 dmac only supports 1/2/4/8/16 bytes burst size. > If some bad D/D doesn't use powers of 2 width, > dmaengine is going to infinite loop. > You'd better check it instead of running loop. Basically, src_addr_width is defined as a 'enum dma_slave_buswidth' so I think we don't need to consider it. Thanks. Best regards, Kgene. -- Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer, SW Solution Development Team, Samsung Electronics Co., Ltd. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html