diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 2857cf0472df02116ff7e1c82ddc4a8906752752..d11f34832a972597dfa71890dde819dc24d8ad03 100644
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -527,6 +527,8 @@ struct _snd_ac97 {
 	struct device dev;
 };
 
+#define to_ac97_t(d) container_of(d, struct _snd_ac97, dev)
+
 /* conditions */
 static inline int ac97_is_audio(ac97_t * ac97)
 {
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index f221eba5c32f8baaca11219a54b42a3dca08f199..41fc290149ed19a49dcd40b84161c7191657563b 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1828,7 +1828,6 @@ static int snd_ac97_dev_register(snd_device_t *device)
 
 	ac97->dev.bus = &ac97_bus_type;
 	ac97->dev.parent = ac97->bus->card->dev;
-	ac97->dev.platform_data = ac97;
 	ac97->dev.release = ac97_device_release;
 	snprintf(ac97->dev.bus_id, BUS_ID_SIZE, "card%d-%d", ac97->bus->card->number, ac97->num);
 	if ((err = device_register(&ac97->dev)) < 0) {