diff options
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 767ff9fdb2e5..1e38fc9b10c1 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -693,8 +693,9 @@ static void stm32_usart_transmit_chars(struct uart_port *port) int ret; if (!stm32_port->hw_flow_control && - port->rs485.flags & SER_RS485_ENABLED) { - stm32_port->txdone = false; + port->rs485.flags & SER_RS485_ENABLED && + (port->x_char || + !(uart_circ_empty(xmit) || uart_tx_stopped(port)))) { stm32_usart_tc_interrupt_disable(port); stm32_usart_rs485_rts_enable(port); } @@ -743,7 +744,6 @@ static void stm32_usart_transmit_chars(struct uart_port *port) stm32_usart_tx_interrupt_disable(port); if (!stm32_port->hw_flow_control && port->rs485.flags & SER_RS485_ENABLED) { - stm32_port->txdone = true; stm32_usart_tc_interrupt_enable(port); } } |