Most likely due to a copy-paste mistake the dst_addr member of the dma_slave_config structure has been marked as ignored if the !source! address belong to the memory. That is relevant to the src_addr field of the structure while the dst_addr field as containing a destination device address is supposed to be ignored if the destination is the CPU memory. Let's fix the field description accordingly. Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> --- include/linux/dmaengine.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 842d4f7ca752..f204ea16ac1c 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -395,7 +395,7 @@ enum dma_slave_buswidth { * should be read (RX), if the source is memory this argument is * ignored. * @dst_addr: this is the physical address where DMA slave data - * should be written (TX), if the source is memory this argument + * should be written (TX), if the destination is memory this argument * is ignored. * @src_addr_width: this is the width in bytes of the source (RX) * register where DMA data shall be read. If the source -- 2.35.1