USB: serial: mos7720: Fix possible null pointer dereference

Signed-off-by: Huzaifa Sidhpurwala <huzaifas@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 7d3bc9a3e2b..ae506f4ee29 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -2052,7 +2052,7 @@ static int mos7720_startup(struct usb_serial *serial)
         struct usb_device *dev;
         int i;
         char data;
-        u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
+        u16 product;
         int ret_val;
 
         dbg("%s: Entering ..........", __func__);
@@ -2062,6 +2062,7 @@ static int mos7720_startup(struct usb_serial *serial)
                 return -ENODEV;
         }
 
+        product = le16_to_cpu(serial->dev->descriptor.idProduct);
         dev = serial->dev;
 
         /*