1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 0cf9b85901dc..bd06ab790c64 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -2253,7 +2253,7 @@ int serial8250_do_startup(struct uart_port *port)
            is variable. So, let's just don't test if we receive
            TX irq. This way, we'll never enable UART_BUG_TXEN.
          */
-        if (skip_txen_test || up->port.flags & UPF_NO_TXEN_TEST)
+        if (up->port.flags & UPF_NO_TXEN_TEST)
                 goto dont_test_tx_en;
 
         /*
@@ -3196,6 +3196,9 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
 
                 up->port.dev = dev;
 
+                if (skip_txen_test)
+                        up->port.flags |= UPF_NO_TXEN_TEST;
+
                 if (up->port.flags & UPF_FIXED_TYPE)
                         serial8250_init_fixed_type_port(up, up->port.type);
 
@@ -3663,6 +3666,9 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
                 if (up->port.dev)
                         uart->port.dev = up->port.dev;
 
+                if (skip_txen_test)
+                        uart->port.flags |= UPF_NO_TXEN_TEST;
+
                 if (up->port.flags & UPF_FIXED_TYPE)
                         serial8250_init_fixed_type_port(uart, up->port.type);
 
@@ -3728,6 +3734,8 @@ void serial8250_unregister_port(int line)
         uart_remove_one_port(&serial8250_reg, &uart->port);
         if (serial8250_isa_devs) {
                 uart->port.flags &= ~UPF_BOOT_AUTOCONF;
+                if (skip_txen_test)
+                        uart->port.flags |= UPF_NO_TXEN_TEST;
                 uart->port.type = PORT_UNKNOWN;
                 uart->port.dev = &serial8250_isa_devs->dev;
                 uart->capabilities = 0;