usb: usb251xb: fix to avoid potential NULL pointer dereference

[ Upstream commit 41f00e6e9e55546390031996b773e7f3c1d95928 ]

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>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>

diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index a6efb9a..5f7734c 100644 (file)
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -601,7 +601,7 @@ 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) {