SCSI not showing tray status correctly

When trying to get the drive status via ioctl CDROM_DRIVE_STATUS, with no disk it gives CDS_TRAY_OPEN even if the tray is closed.

ioctl works as expected with ide-cd driver. Here is the patch to get the same behaviour on SCSI drives for kernel 2.6.10. 2.4 branch have same problem.

--- linux-2.6.10-orig/drivers/scsi/sr_ioctl.c 2004-12-27
04:47:22.000000000 +0100
+++ linux-2.6.10/drivers/scsi/sr_ioctl.c 2004-12-27 05:54:08.000000000
+0100
@@ -216,14 +216,20 @@

int sr_drive_status(struct cdrom_device_info *cdi, int slot) {
+ struct media_event_desc med;
+

        if (CDSL_CURRENT != slot) {
                /* we have no changer support */
                return -EINVAL;
        }
+
        if (0 == test_unit_ready(cdi->handle))
                return CDS_DISC_OK;

- return CDS_TRAY_OPEN;
+ if (!cdrom_get_media_event(cdi, &med) && med.door_open)
+ return CDS_TRAY_OPEN;
+
+ return CDS_NO_DISC;
}

int sr_disk_status(struct cdrom_device_info *cdi)