484 	if (bs->tx_buf && !sg_is_last(&tfr->tx_sg.sgl[0]))  in bcm2835_spi_transfer_prologue()
485 		bs->tx_prologue = sg_dma_len(&tfr->tx_sg.sgl[0]) & 3;  in bcm2835_spi_transfer_prologue()
487 	if (bs->rx_buf && !sg_is_last(&tfr->rx_sg.sgl[0])) {  in bcm2835_spi_transfer_prologue()
488 		bs->rx_prologue = sg_dma_len(&tfr->rx_sg.sgl[0]) & 3;  in bcm2835_spi_transfer_prologue()
491 			if (!bs->tx_buf || sg_is_last(&tfr->tx_sg.sgl[0])) {  in bcm2835_spi_transfer_prologue()
496 					!(sg_dma_len(&tfr->tx_sg.sgl[0]) & ~3);  in bcm2835_spi_transfer_prologue()
518 					   sg_dma_address(&tfr->rx_sg.sgl[0]),  in bcm2835_spi_transfer_prologue()
521 		sg_dma_address(&tfr->rx_sg.sgl[0]) += bs->rx_prologue;  in bcm2835_spi_transfer_prologue()
522 		sg_dma_len(&tfr->rx_sg.sgl[0])     -= bs->rx_prologue;  in bcm2835_spi_transfer_prologue()
544 		sg_dma_address(&tfr->tx_sg.sgl[0]) += bs->tx_prologue;  in bcm2835_spi_transfer_prologue()
545 		sg_dma_len(&tfr->tx_sg.sgl[0])     -= bs->tx_prologue;  in bcm2835_spi_transfer_prologue()
547 		sg_dma_len(&tfr->tx_sg.sgl[0])      = 0;  in bcm2835_spi_transfer_prologue()
548 		sg_dma_address(&tfr->tx_sg.sgl[1]) += 4;  in bcm2835_spi_transfer_prologue()
549 		sg_dma_len(&tfr->tx_sg.sgl[1])     -= 4;  in bcm2835_spi_transfer_prologue()
569 		sg_dma_address(&tfr->rx_sg.sgl[0]) -= bs->rx_prologue;  in bcm2835_spi_undo_prologue()
570 		sg_dma_len(&tfr->rx_sg.sgl[0])     += bs->rx_prologue;  in bcm2835_spi_undo_prologue()
577 		sg_dma_address(&tfr->tx_sg.sgl[0]) -= bs->tx_prologue;  in bcm2835_spi_undo_prologue()
578 		sg_dma_len(&tfr->tx_sg.sgl[0])     += bs->tx_prologue;  in bcm2835_spi_undo_prologue()
580 		sg_dma_len(&tfr->tx_sg.sgl[0])      = bs->tx_prologue - 4;  in bcm2835_spi_undo_prologue()
581 		sg_dma_address(&tfr->tx_sg.sgl[1]) -= 4;  in bcm2835_spi_undo_prologue()
582 		sg_dma_len(&tfr->tx_sg.sgl[1])     += 4;  in bcm2835_spi_undo_prologue()
666 	struct scatterlist *sgl;  in bcm2835_spi_prepare_sg()  local
678 		sgl   = tfr->tx_sg.sgl;  in bcm2835_spi_prepare_sg()
684 		sgl   = tfr->rx_sg.sgl;  in bcm2835_spi_prepare_sg()
688 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);  in bcm2835_spi_prepare_sg()