291 	dmaengine_terminate_async(stm32port->tx_ch);  in stm32_usart_tx_dma_complete()
387 	desc = dmaengine_prep_slave_single(stm32port->tx_ch,  in stm32_usart_transmit_chars_dma()
402 		dmaengine_terminate_async(stm32port->tx_ch);  in stm32_usart_transmit_chars_dma()
407 	dma_async_issue_pending(stm32port->tx_ch);  in stm32_usart_transmit_chars_dma()
459 	if (stm32_port->tx_ch)  in stm32_usart_transmit_chars()
497 	if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch)) {  in stm32_usart_interrupt()
1231 	stm32port->tx_ch = dma_request_slave_channel(dev, "tx");  in stm32_usart_of_dma_tx_probe()
1232 	if (!stm32port->tx_ch) {  in stm32_usart_of_dma_tx_probe()
1249 	ret = dmaengine_slave_config(stm32port->tx_ch, &config);  in stm32_usart_of_dma_tx_probe()
1264 	dma_release_channel(stm32port->tx_ch);  in stm32_usart_of_dma_tx_probe()
1265 	stm32port->tx_ch = NULL;  in stm32_usart_of_dma_tx_probe()
1337 	if (stm32port->tx_ch) {  in stm32_usart_serial_probe()
1338 		dmaengine_terminate_async(stm32port->tx_ch);  in stm32_usart_serial_probe()
1339 		dma_release_channel(stm32port->tx_ch);  in stm32_usart_serial_probe()
1390 	if (stm32_port->tx_ch) {  in stm32_usart_serial_remove()
1391 		dmaengine_terminate_async(stm32_port->tx_ch);  in stm32_usart_serial_remove()
1392 		dma_release_channel(stm32_port->tx_ch);  in stm32_usart_serial_remove()