[PATCH] ALI M1533 audio hang fix

From: risto.sandvik@helsinki.fi

Everything freezes when trying to play sounds using the alsa driver opl3sa2
(kernel supplied or 1.0.0rc2) on an Acer Extensa series laptop with the Ali
M1533 PCI to ISA bridge.  Problem exists both in the 2.6 and 2.4 series of
kernels.

Adding AL_M1533 to drivers/pci/quirks.c fixes the problem for both.  This has
been a known problem since 2.2.x (see
http://www.mfn.unipmn.it/~sitta/linux503.html)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index e588e3270287a17fd8e79acfc1cd2c6f7aa2abdc..c6d9a5cd2996b2de94922a14734b0f7ce1906831 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -858,6 +858,7 @@ static struct pci_fixup pci_fixups[] __devinitdata = {
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C586_0,     quirk_isa_dma_hangs },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C596,       quirk_isa_dma_hangs },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82371SB_0,  quirk_isa_dma_hangs },
+       { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_AL,       PCI_DEVICE_ID_AL_M1533,         quirk_isa_dma_hangs },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82454NX,    quirk_disable_pxb },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_NEC,      PCI_DEVICE_ID_NEC_CBUS_1,       quirk_isa_dma_hangs },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_NEC,      PCI_DEVICE_ID_NEC_CBUS_2,       quirk_isa_dma_hangs },