--- a/sound/pci/hda/patch_cirrus.c	2010-10-29 08:30:04.029681004 +0200
+++ b/sound/pci/hda/patch_cirrus.c	2010-10-29 08:34:04.509681003 +0200
@@ -1089,6 +1089,7 @@
 static struct snd_pci_quirk cs420x_cfg_tbl[] = {
 	SND_PCI_QUIRK(0x10de, 0xcb79, "MacBookPro 5,5", CS420X_MBP55),
 	SND_PCI_QUIRK(0x8086, 0x7270, "IMac 27 Inch", CS420X_IMAC27),
+	SND_PCI_QUIRK(0x10de, 0x0d94, "MacBookAir 3,1(2)", CS420X_MBP55),
 	{} /* terminator */
 };