viocd: add dummy audio ioctl handler

Make sure audio_ioctl is always defined even if being a dummy function
since the cdrom_ioctl interface assumes its existence and we don't
want to BUG on null ptr on some ioctls like, e.g. CDROMREADTOCENTRY,
CDROMREADTOCHDR etc. when we fix CDC_PLAY_AUDIO checking in cdrom.c.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 9d0dfe6e0d63..031e0e1a1a3b 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -550,12 +550,19 @@ return_complete:
         }
 }
 
+static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
+                             void *arg)
+{
+        return -EINVAL;
+}
+
 static struct cdrom_device_ops viocd_dops = {
         .open = viocd_open,
         .release = viocd_release,
         .media_changed = viocd_media_changed,
         .lock_door = viocd_lock_door,
         .generic_packet = viocd_packet,
+        .audio_ioctl = viocd_audio_ioctl,
         .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM
 };