256 	if ((xfer->tx_buf) &&  in spi_statistics_add_transfer_stats()
257 	    (xfer->tx_buf != master->dummy_tx))  in spi_statistics_add_transfer_stats()
775 		if (xfer->tx_buf != NULL) {  in __spi_map_msg()
777 					  (void *)xfer->tx_buf, xfer->len,  in __spi_map_msg()
852 		if (xfer->tx_buf == master->dummy_tx)  in spi_unmap_msg()
853 			xfer->tx_buf = NULL;  in spi_unmap_msg()
873 			    !xfer->tx_buf)  in spi_map_msg()
900 				if (!xfer->tx_buf)  in spi_map_msg()
901 					xfer->tx_buf = master->dummy_tx;  in spi_map_msg()
939 		if (xfer->tx_buf || xfer->rx_buf) {  in spi_transfer_one_message()
2119 			if (xfer->rx_buf && xfer->tx_buf)  in __spi_validate()
2121 			if ((flags & SPI_MASTER_NO_TX) && xfer->tx_buf)  in __spi_validate()
2171 		if (xfer->tx_buf && !xfer->tx_nbits)  in __spi_validate()
2179 		if (xfer->tx_buf) {  in __spi_validate()
2571 	x[0].tx_buf = local_buf;  in spi_write_then_read()
2579 	if (x[0].tx_buf == buf)  in spi_write_then_read()