serial: sc16is7xx: remove redundant check in rs485_config

In uart_set_rs485_config() the serial core already ensures that only one of
both options RTS on send or RTS after send is set.

So remove this check from the drivers rs485_config() function to avoid
redundancy.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Link: https://lore.kernel.org/r/20220410104642.32195-5-LinoSanfilippo@gmx.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index e857fb61efbfc4207fffee2b50324f66ad60a768..bb939d2877db370967a80272c94a030581519306 100644 (file)
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1134,16 +1134,6 @@ static int sc16is7xx_config_rs485(struct uart_port *port,
        struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
 
        if (rs485->flags & SER_RS485_ENABLED) {
-               bool rts_during_rx, rts_during_tx;
-
-               rts_during_rx = rs485->flags & SER_RS485_RTS_AFTER_SEND;
-               rts_during_tx = rs485->flags & SER_RS485_RTS_ON_SEND;
-
-               if (rts_during_rx == rts_during_tx)
-                       dev_err(port->dev,
-                               "unsupported RTS signalling on_send:%d after_send:%d - exactly one of RS485 RTS flags should be set\n",
-                               rts_during_tx, rts_during_rx);
-
                /*
                 * RTS signal is handled by HW, it's timing can't be influenced.
                 * However, it's sometimes useful to delay TX even without RTS