ide-cd: remove dead dsc_overlap setting

dsc_overlap setting is not useful anymore for ide-cd so remove
"dsc_overlap" /proc setting, disallow changing the setting through
HDIO_SET_NICE ioctl and cleanup ide_cd{rom_setup,_release}().

Cc: Borislav Petkov <petkovbb@googlemail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

2 files changed, 2 insertions, 15 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index ea35e94d0980..5daa4dd1b018 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1831,13 +1831,6 @@ static ide_proc_entry_t idecd_proc[] = {
         { NULL, 0, NULL, NULL }
 };
 
-ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
-
-static const struct ide_proc_devset idecd_settings[] = {
-        IDE_PROC_DEVSET(dsc_overlap, 0, 1),
-        { 0 },
-};
-
 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
 {
         return idecd_proc;
@@ -1845,7 +1838,7 @@ static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
 
 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
 {
-        return idecd_settings;
+        return NULL;
 }
 #endif
 
@@ -1945,11 +1938,6 @@ static int ide_cdrom_setup(ide_drive_t *drive)
         /* set correct block size */
         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
 
-        if (drive->next != drive)
-                drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
-        else
-                drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
-
         if (ide_cdrom_register(drive, nslots)) {
                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
                                 " cdrom driver.\n", drive->name, __func__);
@@ -1986,7 +1974,6 @@ static void ide_cd_release(struct kref *kref)
         kfree(info->toc);
         if (devinfo->handle == drive)
                 unregister_cdrom(devinfo);
-        drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
         drive->driver_data = NULL;
         blk_queue_prep_rq(drive->queue, NULL);
         g->private_data = NULL;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index f9034765aa18..28232c64c346 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -95,7 +95,7 @@ static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
                 return -EPERM;
 
         if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
-            (drive->media == ide_disk || drive->media == ide_floppy ||
+            (drive->media != ide_tape ||
              (drive->dev_flags & IDE_DFLAG_SCSI)))
                 return -EPERM;