1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index 6c7910d8e136..ae7d86e44b76 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -212,6 +212,12 @@ static int fintek_8250_rs485_config(struct uart_port *port,
         rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND |
                         SER_RS485_RTS_AFTER_SEND;
 
+        /* Only the first port supports delays */
+        if (pdata->index) {
+                rs485->delay_rts_before_send = 0;
+                rs485->delay_rts_after_send = 0;
+        }
+
         if (rs485->delay_rts_before_send) {
                 rs485->delay_rts_before_send = 1;
                 config |= TXW4C_IRA;