536 	struct spi_transfer *xfer;  in __spi_map_msg()  local
545 	list_for_each_entry(xfer, &msg->transfers, transfer_list) {  in __spi_map_msg()
546 		if (!master->can_dma(master, msg->spi, xfer))  in __spi_map_msg()
549 		if (xfer->tx_buf != NULL) {  in __spi_map_msg()
550 			ret = spi_map_buf(master, tx_dev, &xfer->tx_sg,  in __spi_map_msg()
551 					  (void *)xfer->tx_buf, xfer->len,  in __spi_map_msg()
557 		if (xfer->rx_buf != NULL) {  in __spi_map_msg()
558 			ret = spi_map_buf(master, rx_dev, &xfer->rx_sg,  in __spi_map_msg()
559 					  xfer->rx_buf, xfer->len,  in __spi_map_msg()
562 				spi_unmap_buf(master, tx_dev, &xfer->tx_sg,  in __spi_map_msg()
576 	struct spi_transfer *xfer;  in spi_unmap_msg()  local
585 	list_for_each_entry(xfer, &msg->transfers, transfer_list) {  in spi_unmap_msg()
590 		if (xfer->tx_buf == master->dummy_tx)  in spi_unmap_msg()
591 			xfer->tx_buf = NULL;  in spi_unmap_msg()
592 		if (xfer->rx_buf == master->dummy_rx)  in spi_unmap_msg()
593 			xfer->rx_buf = NULL;  in spi_unmap_msg()
595 		if (!master->can_dma(master, msg->spi, xfer))  in spi_unmap_msg()
598 		spi_unmap_buf(master, rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE);  in spi_unmap_msg()
599 		spi_unmap_buf(master, tx_dev, &xfer->tx_sg, DMA_TO_DEVICE);  in spi_unmap_msg()
620 	struct spi_transfer *xfer;  in spi_map_msg()  local
628 		list_for_each_entry(xfer, &msg->transfers, transfer_list) {  in spi_map_msg()
630 			    !xfer->tx_buf)  in spi_map_msg()
631 				max_tx = max(xfer->len, max_tx);  in spi_map_msg()
633 			    !xfer->rx_buf)  in spi_map_msg()
634 				max_rx = max(xfer->len, max_rx);  in spi_map_msg()
655 			list_for_each_entry(xfer, &msg->transfers,  in spi_map_msg()
657 				if (!xfer->tx_buf)  in spi_map_msg()
658 					xfer->tx_buf = master->dummy_tx;  in spi_map_msg()
659 				if (!xfer->rx_buf)  in spi_map_msg()
660 					xfer->rx_buf = master->dummy_rx;  in spi_map_msg()
678 	struct spi_transfer *xfer;  in spi_transfer_one_message()  local
685 	list_for_each_entry(xfer, &msg->transfers, transfer_list) {  in spi_transfer_one_message()
686 		trace_spi_transfer_start(msg, xfer);  in spi_transfer_one_message()
688 		if (xfer->tx_buf || xfer->rx_buf) {  in spi_transfer_one_message()
691 			ret = master->transfer_one(master, msg->spi, xfer);  in spi_transfer_one_message()
700 				ms = xfer->len * 8 * 1000 / xfer->speed_hz;  in spi_transfer_one_message()
713 			if (xfer->len)  in spi_transfer_one_message()
716 					xfer->len);  in spi_transfer_one_message()
719 		trace_spi_transfer_stop(msg, xfer);  in spi_transfer_one_message()
724 		if (xfer->delay_usecs)  in spi_transfer_one_message()
725 			udelay(xfer->delay_usecs);  in spi_transfer_one_message()
727 		if (xfer->cs_change) {  in spi_transfer_one_message()
728 			if (list_is_last(&xfer->transfer_list,  in spi_transfer_one_message()
738 		msg->actual_length += xfer->len;  in spi_transfer_one_message()
1814 	struct spi_transfer *xfer;  in __spi_validate()  local
1829 		list_for_each_entry(xfer, &message->transfers, transfer_list) {  in __spi_validate()
1830 			if (xfer->rx_buf && xfer->tx_buf)  in __spi_validate()
1832 			if ((flags & SPI_MASTER_NO_TX) && xfer->tx_buf)  in __spi_validate()
1834 			if ((flags & SPI_MASTER_NO_RX) && xfer->rx_buf)  in __spi_validate()
1845 	list_for_each_entry(xfer, &message->transfers, transfer_list) {  in __spi_validate()
1846 		message->frame_length += xfer->len;  in __spi_validate()
1847 		if (!xfer->bits_per_word)  in __spi_validate()
1848 			xfer->bits_per_word = spi->bits_per_word;  in __spi_validate()
1850 		if (!xfer->speed_hz)  in __spi_validate()
1851 			xfer->speed_hz = spi->max_speed_hz;  in __spi_validate()
1854 		    xfer->speed_hz > master->max_speed_hz)  in __spi_validate()
1855 			xfer->speed_hz = master->max_speed_hz;  in __spi_validate()
1859 			if (xfer->bits_per_word > 32)  in __spi_validate()
1862 					BIT(xfer->bits_per_word - 1)))  in __spi_validate()
1870 		if (xfer->bits_per_word <= 8)  in __spi_validate()
1872 		else if (xfer->bits_per_word <= 16)  in __spi_validate()
1878 		if (xfer->len % w_size)  in __spi_validate()
1881 		if (xfer->speed_hz && master->min_speed_hz &&  in __spi_validate()
1882 		    xfer->speed_hz < master->min_speed_hz)  in __spi_validate()
1885 		if (xfer->tx_buf && !xfer->tx_nbits)  in __spi_validate()
1886 			xfer->tx_nbits = SPI_NBITS_SINGLE;  in __spi_validate()
1887 		if (xfer->rx_buf && !xfer->rx_nbits)  in __spi_validate()
1888 			xfer->rx_nbits = SPI_NBITS_SINGLE;  in __spi_validate()
1893 		if (xfer->tx_buf) {  in __spi_validate()
1894 			if (xfer->tx_nbits != SPI_NBITS_SINGLE &&  in __spi_validate()
1895 				xfer->tx_nbits != SPI_NBITS_DUAL &&  in __spi_validate()
1896 				xfer->tx_nbits != SPI_NBITS_QUAD)  in __spi_validate()
1898 			if ((xfer->tx_nbits == SPI_NBITS_DUAL) &&  in __spi_validate()
1901 			if ((xfer->tx_nbits == SPI_NBITS_QUAD) &&  in __spi_validate()
1906 		if (xfer->rx_buf) {  in __spi_validate()
1907 			if (xfer->rx_nbits != SPI_NBITS_SINGLE &&  in __spi_validate()
1908 				xfer->rx_nbits != SPI_NBITS_DUAL &&  in __spi_validate()
1909 				xfer->rx_nbits != SPI_NBITS_QUAD)  in __spi_validate()
1911 			if ((xfer->rx_nbits == SPI_NBITS_DUAL) &&  in __spi_validate()
1914 			if ((xfer->rx_nbits == SPI_NBITS_QUAD) &&  in __spi_validate()