diff -uNr linux-2.6.37-rc1/sound/pci/hda/patch_cirrus.c linux-2.6.37-rc1-patched/sound/pci/hda/patch_cirrus.c
--- linux-2.6.37-rc1/sound/pci/hda/patch_cirrus.c	2010-11-02 21:27:10.000000000 +0100
+++ linux-2.6.37-rc1-patched/sound/pci/hda/patch_cirrus.c	2010-11-02 21:28:53.000000000 +0100
@@ -1169,6 +1169,7 @@
 	SND_PCI_QUIRK(0x10de, 0xcb79, "MacBookPro 5,5", CS420X_MBP55),
 	SND_PCI_QUIRK(0x10de, 0xcb89, "MacBookPro 7,1", CS420X_MBP55),
 	SND_PCI_QUIRK(0x8086, 0x7270, "IMac 27 Inch", CS420X_IMAC27),
+	SND_PCI_QUIRK(0x10de, 0x0d94, "MacBookAir 3,1(2)", CS420X_MBP55),
 	{} /* terminator */
 };