175 	if (threaded && stm32_port->rx_ch) {  in stm32_pending_rx()
176 		status = dmaengine_tx_status(stm32_port->rx_ch,  in stm32_pending_rx()
177 					     stm32_port->rx_ch->cookie,  in stm32_pending_rx()
197 	if (stm32_port->rx_ch) {  in stm32_get_char()
466 	if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))  in stm32_interrupt()
474 	if (stm32_port->rx_ch)  in stm32_interrupt()
487 	if (stm32_port->rx_ch)  in stm32_threaded_interrupt()
783 	if (ofs->rtor != UNDEF_REG && (stm32_port->rx_ch ||  in stm32_set_termios()
795 		if (!stm32_port->rx_ch)  in stm32_set_termios()
865 	if (stm32_port->rx_ch)  in stm32_set_termios()
1094 	stm32port->rx_ch = dma_request_slave_channel(dev, "rx");  in stm32_of_dma_rx_probe()
1095 	if (!stm32port->rx_ch) {  in stm32_of_dma_rx_probe()
1112 	ret = dmaengine_slave_config(stm32port->rx_ch, &config);  in stm32_of_dma_rx_probe()
1120 	desc = dmaengine_prep_dma_cyclic(stm32port->rx_ch,  in stm32_of_dma_rx_probe()
1138 	dma_async_issue_pending(stm32port->rx_ch);  in stm32_of_dma_rx_probe()
1148 	dma_release_channel(stm32port->rx_ch);  in stm32_of_dma_rx_probe()
1149 	stm32port->rx_ch = NULL;  in stm32_of_dma_rx_probe()
1284 	if (stm32_port->rx_ch)  in stm32_serial_remove()
1285 		dma_release_channel(stm32_port->rx_ch);  in stm32_serial_remove()