293 	if (!stm32_port->rx_ch)  in stm32_usart_rx_dma_enabled()
456 		rx_dma_status = dmaengine_tx_status(stm32_port->rx_ch,  in stm32_usart_receive_chars()
457 						    stm32_port->rx_ch->cookie,  in stm32_usart_receive_chars()
475 			dmaengine_terminate_async(stm32_port->rx_ch);  in stm32_usart_receive_chars()
941 	if (stm32_port->rx_ch)  in stm32_usart_unthrottle()
955 	if (stm32_port->rx_ch)  in stm32_usart_stop_rx()
977 	desc = dmaengine_prep_dma_cyclic(stm32_port->rx_ch,  in stm32_usart_start_rx_dma_cyclic()
993 		dmaengine_terminate_sync(stm32_port->rx_ch);  in stm32_usart_start_rx_dma_cyclic()
998 	dma_async_issue_pending(stm32_port->rx_ch);  in stm32_usart_start_rx_dma_cyclic()
1036 	if (stm32_port->rx_ch) {  in stm32_usart_startup()
1083 	if (stm32_port->rx_ch)  in stm32_usart_shutdown()
1084 		dmaengine_terminate_async(stm32_port->rx_ch);  in stm32_usart_shutdown()
1185 	if (ofs->rtor != UNDEF_REG && (stm32_port->rx_ch ||  in stm32_usart_set_termios()
1264 	if (stm32_port->rx_ch) {  in stm32_usart_set_termios()
1623 	ret = dmaengine_slave_config(stm32port->rx_ch, &config);  in stm32_usart_of_dma_rx_probe()
1684 	stm32port->rx_ch = dma_request_chan(&pdev->dev, "rx");  in stm32_usart_serial_probe()
1685 	if (PTR_ERR(stm32port->rx_ch) == -EPROBE_DEFER)  in stm32_usart_serial_probe()
1689 	if (IS_ERR(stm32port->rx_ch))  in stm32_usart_serial_probe()
1690 		stm32port->rx_ch = NULL;  in stm32_usart_serial_probe()
1712 	if (stm32port->rx_ch && stm32_usart_of_dma_rx_probe(stm32port, pdev)) {  in stm32_usart_serial_probe()
1714 		dma_release_channel(stm32port->rx_ch);  in stm32_usart_serial_probe()
1715 		stm32port->rx_ch = NULL;  in stm32_usart_serial_probe()
1724 	if (!stm32port->rx_ch)  in stm32_usart_serial_probe()
1750 	if (stm32port->rx_ch)  in stm32_usart_serial_probe()
1767 	if (stm32port->rx_ch)  in stm32_usart_serial_probe()
1768 		dma_release_channel(stm32port->rx_ch);  in stm32_usart_serial_probe()
1802 	if (stm32_port->rx_ch) {  in stm32_usart_serial_remove()
1804 		dma_release_channel(stm32_port->rx_ch);  in stm32_usart_serial_remove()
1999 		if (stm32_port->rx_ch) {  in stm32_usart_serial_en_wakeup()
2005 			dmaengine_terminate_async(stm32_port->rx_ch);  in stm32_usart_serial_en_wakeup()
2014 		if (stm32_port->rx_ch) {  in stm32_usart_serial_en_wakeup()