Replace the obsolete simple_strtoul() calls with kstrtouint() calls.

Signed-off-by: Ian Abbott <[email protected]>
---
 drivers/usb/serial/ftdi_sio.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 2662fc3b49c5..e6785d84280b 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1713,9 +1713,13 @@ static ssize_t latency_timer_store(struct device *dev,
 {
        struct usb_serial_port *port = to_usb_serial_port(dev);
        struct ftdi_private *priv = usb_get_serial_port_data(port);
-       int v = simple_strtoul(valbuf, NULL, 10);
+       unsigned int v;
        int rv;
 
+       rv = kstrtouint(valbuf, 10, &v);
+       if (rv)
+               return rv;
+
        if (v < 1 || v > 255)
                return -EINVAL;
 
@@ -1735,10 +1739,14 @@ static ssize_t store_event_char(struct device *dev,
        struct usb_serial_port *port = to_usb_serial_port(dev);
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct usb_device *udev = port->serial->dev;
-       int v = simple_strtoul(valbuf, NULL, 10);
+       unsigned int v;
        int rv;
 
-       if (v < 0 || v >= 0x200)
+       rv = kstrtouint(valbuf, 10, &v);
+       if (rv)
+               return rv;
+
+       if (v >= 0x200)
                return -EINVAL;
 
        dev_dbg(&port->dev, "%s: setting event char = %i\n", __func__, v);
-- 
2.11.0

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