1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index edf3b124583c..115662c16dcc 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1566,14 +1566,17 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
         struct usb_device *udev = serial->dev;
 
         struct usb_interface *interface = serial->interface;
-        struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
+        struct usb_endpoint_descriptor *ep_desc;
 
         unsigned num_endpoints;
-        int i;
+        unsigned i;
 
         num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
         dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
 
+        if (!num_endpoints)
+                return;
+
         /* NOTE: some customers have programmed FT232R/FT245R devices
          * with an endpoint size of 0 - not good.  In this case, we
          * want to override the endpoint descriptor setting and use a