I sent you an email to send this patch, but reviewing it now it's not
actually a run time bug. The cdrom_slot_status() function takes an
integer argument so it works.
I'm working on a static checker warning for these kinds of bugs:
drivers/cdrom/cdrom.c:2444 cdrom_ioctl_select_disc() warn: truncated comparison 'arg' 'u64max' to 's32max'
drivers/cdrom/cdrom.c
2435 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2436 unsigned long arg)
2437 {
2438 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2439
2440 if (!CDROM_CAN(CDC_SELECT_DISC))
2441 return -ENOSYS;
2442
2443 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2444 if ((int)arg >= cdi->capacity)
^^^^^^^^^^^^^^^^^^^^^^^^^
2445 return -EINVAL;
2446 }
2447
2448 /*
2449 * ->select_disc is a hook to allow a driver-specific way of
2450 * seleting disc. However, since there is no equivalent hook for
2451 * cdrom_slot_status this may not actually be useful...
2452 */
2453 if (cdi->ops->select_disc)
2454 return cdi->ops->select_disc(cdi, arg);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
->select_disc() also take an int so it's fine (plus there is no such
function so it's dead code).
2455
2456 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2457 return cdrom_select_disc(cdi, arg);
^^^
Also an int.
2458 }
So I think it's a good idea to fix these just for cleanliness and to
silence the static checker warnings but it doesn't affect runtime.
regards,
dan carpenter