On 26-09-19, 05:52, Radhey Shyam Pandey wrote: > > > + * VDMA and simple mode do not support residue reporting, so the > > > + * residue field will always be 0. > > > + */ > > > + if (chan->xdev->dma_config->dmatype == XDMA_TYPE_VDMA || > > !chan->has_sg) > > > + return residue; > > > > why not check this in status callback? > Assuming we mean to move vdma and non-sg check to xilinx_dma_tx_status. > Just a thought- Keeping this check in xilinx_dma_get_residue provides > an abstraction and caller can simply call this func with knowing about > IP config specific residue calculation. Considering this point does it > looks ok ?
well you are checking either way, so calling the lower level function only when you need it makes more sense! -- ~Vinod
