src/patches/suse-2.6.27.25/patches.xen/xen3-x86-mcp51-no-dac

   1 From: Tejun Heo <tj@kernel.org>
   2 Subject: x86: disallow DAC for MCP51 PCI bridge
   3 References: bnc#463829, bnc#482220
   4
   5 MCP51 corrupts DAC transfers.  Disallow it.  Reported by pgnet on
   6 bnc#463829.
   7
   8   https://bugzilla.novell.com/show_bug.cgi?id=463829
   9
  10 Signed-off-by: Tejun Heo <tj@kernel.org>
  11 Reported-by: pgnet <pgnet.trash@gmail.com>
  12 Signed-off-by: Tejun Heo <teheo@suse.de>
  13 Automatically created from "patches.arch/x86-mcp51-no-dac" by xen-port-patches.py
  14
  15 --- sle11-2009-03-04.orig/arch/x86/kernel/pci-dma-xen.c 2009-03-04 11:37:52.000000000 +0100
  16 +++ sle11-2009-03-04/arch/x86/kernel/pci-dma-xen.c      2009-03-04 11:37:58.000000000 +0100
  17 @@ -482,4 +482,18 @@ static __devinit void via_no_dac(struct
  18         }
  19  }
  20  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
  21 +
  22 +/*
  23 + * MCP51 PCI bridge corrupts data for DAC.  Disable it.  Reported in
  24 + * bnc#463829.
  25 + */
  26 +static __devinit void mcp51_no_dac(struct pci_dev *dev)
  27 +{
  28 +       if (forbid_dac == 0) {
  29 +               printk(KERN_INFO
  30 +                      "PCI: MCP51 PCI bridge detected. Disabling DAC.\n");
  31 +               forbid_dac = 1;
  32 +       }
  33 +}
  34 +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x026f, mcp51_no_dac);
  35  #endif