From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludovic.desroches@microchip.com (Ludovic Desroches) Date: Wed, 11 Jul 2018 15:26:23 +0200 Subject: [PATCH 3/3] tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode In-Reply-To: <20180711131638.12622-1-ludovic.desroches@microchip.com> References: <20180711131638.12622-1-ludovic.desroches@microchip.com> Message-ID: <20180711132623.13227-1-ludovic.desroches@microchip.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Nicolas Ferre In atmel_shutdown() we call atmel_stop_rx() and atmel_stop_tx() functions. Prevent the rx restart that is implemented in RS485 or ISO7816 modes when calling atmel_stop_tx() by using the atomic information tasklet_shutdown that is already in place for this purpose. Signed-off-by: Nicolas Ferre --- drivers/tty/serial/atmel_serial.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 0118b219f3a8..e4f877e1f3c6 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -617,7 +617,9 @@ static void atmel_stop_tx(struct uart_port *port) if (((port->rs485.flags & SER_RS485_ENABLED) && !(port->rs485.flags & SER_RS485_RX_DURING_TX)) || port->iso7816.flags & SER_ISO7816_ENABLED) - atmel_start_rx(port); + if (!atomic_read(&atmel_port->tasklet_shutdown)) + atmel_start_rx(port); + } /* -- 2.12.2