USB: serial: ftdi_sio: drop GPIO line checking dead code

Now that gpiolib can track the validity of GPIO pins, there is no need
to check whether the line is valid in request().

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201204164739.781812-5-maz@kernel.org
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
[johan: amend commit message]
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 13e575f..a41ce9e 100644 (file)
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1841,9 +1841,6 @@ static int ftdi_gpio_request(struct gpio_chip *gc, unsigned int offset)
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        int result;
 
-       if (priv->gpio_altfunc & BIT(offset))
-               return -ENODEV;
-
        mutex_lock(&priv->gpio_lock);
        if (!priv->gpio_used) {
                /* Set default pin states, as we cannot get them from device */