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path: root/drivers/usb/serial/mct_u232.c
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Diffstat (limited to 'drivers/usb/serial/mct_u232.c')
-rw-r--r--drivers/usb/serial/mct_u232.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index b6911757c85..d9c86516fed 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -499,19 +499,15 @@ static void mct_u232_dtr_rts(struct usb_serial_port *port, int on)
unsigned int control_state;
struct mct_u232_private *priv = usb_get_serial_port_data(port);
- mutex_lock(&port->serial->disc_mutex);
- if (!port->serial->disconnected) {
- /* drop DTR and RTS */
- spin_lock_irq(&priv->lock);
- if (on)
- priv->control_state |= TIOCM_DTR | TIOCM_RTS;
- else
- priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
- control_state = priv->control_state;
- spin_unlock_irq(&priv->lock);
- mct_u232_set_modem_ctrl(port, control_state);
- }
- mutex_unlock(&port->serial->disc_mutex);
+ spin_lock_irq(&priv->lock);
+ if (on)
+ priv->control_state |= TIOCM_DTR | TIOCM_RTS;
+ else
+ priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
+ control_state = priv->control_state;
+ spin_unlock_irq(&priv->lock);
+
+ mct_u232_set_modem_ctrl(port, control_state);
}
static void mct_u232_close(struct usb_serial_port *port)