net: hso: bail out on interrupt URB allocation failure

commit 4d52ebc upstream.

Commit 31db0db ("net: hso: check for allocation failure in
hso_create_bulk_serial_device()") recently started returning an error
when the driver fails to allocate resources for the interrupt endpoint
and tiocmget functionality.

For consistency let's bail out from probe also if the URB allocation
fails.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/usb/hso.c

@@ -2635,14 +2635,14 @@ static struct hso_device *hso_create_bulk_serial_device(
 		}
 
 		tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
-		if (tiocmget->urb) {
-			mutex_init(&tiocmget->mutex);
-			init_waitqueue_head(&tiocmget->waitq);
-		} else
-			hso_free_tiomget(serial);
-	}
-	else
+		if (!tiocmget->urb)
+			goto exit;
+
+		mutex_init(&tiocmget->mutex);
+		init_waitqueue_head(&tiocmget->waitq);
+	} else {
 		num_urbs = 1;
+	}
 
 	if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
 				     BULK_URB_TX_SIZE))