179 	if (threaded && stm32_port->rx_ch) {  in stm32_usart_pending_rx()
180 		status = dmaengine_tx_status(stm32_port->rx_ch,  in stm32_usart_pending_rx()
181 					     stm32_port->rx_ch->cookie,  in stm32_usart_pending_rx()
200 	if (stm32_port->rx_ch) {  in stm32_usart_get_char()
494 	if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))  in stm32_usart_interrupt()
503 	if (stm32_port->rx_ch)  in stm32_usart_interrupt()
514 	if (stm32_port->rx_ch)  in stm32_usart_threaded_interrupt()
832 	if (ofs->rtor != UNDEF_REG && (stm32_port->rx_ch ||  in stm32_usart_set_termios()
844 		if (!stm32_port->rx_ch)  in stm32_usart_set_termios()
908 	if (stm32_port->rx_ch)  in stm32_usart_set_termios()
1155 	stm32port->rx_ch = dma_request_slave_channel(dev, "rx");  in stm32_usart_of_dma_rx_probe()
1156 	if (!stm32port->rx_ch) {  in stm32_usart_of_dma_rx_probe()
1173 	ret = dmaengine_slave_config(stm32port->rx_ch, &config);  in stm32_usart_of_dma_rx_probe()
1181 	desc = dmaengine_prep_dma_cyclic(stm32port->rx_ch,  in stm32_usart_of_dma_rx_probe()
1198 		dmaengine_terminate_sync(stm32port->rx_ch);  in stm32_usart_of_dma_rx_probe()
1203 	dma_async_issue_pending(stm32port->rx_ch);  in stm32_usart_of_dma_rx_probe()
1213 	dma_release_channel(stm32port->rx_ch);  in stm32_usart_of_dma_rx_probe()
1214 	stm32port->rx_ch = NULL;  in stm32_usart_of_dma_rx_probe()
1327 	if (stm32port->rx_ch) {  in stm32_usart_serial_probe()
1328 		dmaengine_terminate_async(stm32port->rx_ch);  in stm32_usart_serial_probe()
1329 		dma_release_channel(stm32port->rx_ch);  in stm32_usart_serial_probe()
1378 	if (stm32_port->rx_ch) {  in stm32_usart_serial_remove()
1379 		dmaengine_terminate_async(stm32_port->rx_ch);  in stm32_usart_serial_remove()
1380 		dma_release_channel(stm32_port->rx_ch);  in stm32_usart_serial_remove()