2 files changed, 3 insertions, 1 deletions

diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 2857cf0472df..d11f34832a97 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/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 67bf3f18e96a..14cb2718cb77 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1059,7 +1059,7 @@ typedef struct {
         unsigned char spk71;        /* Has 7.1 speakers */
         unsigned char sblive51;     /* SBLive! 5.1 - extout 0x11 -> center, 0x12 -> lfe */
         unsigned char spdif_bug;    /* Has Spdif phasing bug */
-        unsigned char ac97_chip;    /* Has an AC97 chip */
+        unsigned char ac97_chip;    /* Has an AC97 chip: 1 = mandatory, 2 = optional */
         unsigned char ecard;        /* APS EEPROM */
         const char *driver;
         const char *name;