usb: usb251xb: fix to avoid potential NULL pointer dereference

of_match_device in usb251xb_probe can fail and returns a NULL pointer.
The patch avoids a potential NULL pointer dereference in this scenario.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 2c8e2cad7e100b592e7b171bca89c24afede095c..04684849d68320862a4de40d5de5e5db4487cd7e 100644 (file)
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -612,7 +612,7 @@ static int usb251xb_probe(struct usb251xb *hub)
                                                           dev);
        int err;
 
-       if (np) {
+       if (np && of_id) {
                err = usb251xb_get_ofdata(hub,
                                          (struct usb251xb_data *)of_id->data);
                if (err) {