ALSA: emux: Add trivial compat ioctl handler

Reported-by: Carmen Cru <carmen.cru@belgacom.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/synth/emux/emux_hwdep.c b/sound/synth/emux/emux_hwdep.c
index ff0b2a8fd25b..5ae1eae9f6db 100644
--- a/sound/synth/emux/emux_hwdep.c
+++ b/sound/synth/emux/emux_hwdep.c
@@ -128,6 +128,9 @@ snd_emux_init_hwdep(struct snd_emux *emu)
         strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
         hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
         hw->ops.ioctl = snd_emux_hwdep_ioctl;
+        /* The ioctl parameter types are compatible between 32- and
+         * 64-bit architectures, so use the same function. */
+        hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
         hw->exclusive = 1;
         hw->private_data = emu;
         if ((err = snd_card_register(emu->card)) < 0)