549 		if (xfer->tx_buf != NULL) {  in __spi_map_msg()
551 					  (void *)xfer->tx_buf, xfer->len,  in __spi_map_msg()
590 		if (xfer->tx_buf == master->dummy_tx)  in spi_unmap_msg()
591 			xfer->tx_buf = NULL;  in spi_unmap_msg()
630 			    !xfer->tx_buf)  in spi_map_msg()
657 				if (!xfer->tx_buf)  in spi_map_msg()
658 					xfer->tx_buf = master->dummy_tx;  in spi_map_msg()
688 		if (xfer->tx_buf || xfer->rx_buf) {  in spi_transfer_one_message()
1830 			if (xfer->rx_buf && xfer->tx_buf)  in __spi_validate()
1832 			if ((flags & SPI_MASTER_NO_TX) && xfer->tx_buf)  in __spi_validate()
1885 		if (xfer->tx_buf && !xfer->tx_nbits)  in __spi_validate()
1893 		if (xfer->tx_buf) {  in __spi_validate()
2268 	x[0].tx_buf = local_buf;  in spi_write_then_read()
2276 	if (x[0].tx_buf == buf)  in spi_write_then_read()