Thanks to  Darren Salt <linux@youmustbejoking.demon.co.uk> for pointing this
issue.
Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
                (void *) &buf, sizeof(buf), &size, usb_timeout);
        if (size != sizeof(buf))
                printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_register: "
-                       "return size differs: %d != %d\n", size, sizeof(buf));
+                      "return size differs: %d != %ld\n", size, sizeof(buf));
        if (retval < 0)
                printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
                        "usb_interrupt_msg returned %d\n", retval);