1 files changed, 16 insertions, 0 deletions

diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index 65f67070db64..83c3645ccc43 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -449,3 +449,19 @@ static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
                          pci_post_fixup_toshiba_ohci1394);
+
+
+/*
+ * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
+ * configuration space.
+ */
+static void __devinit pci_early_fixup_cyrix_5530(struct pci_dev *dev)
+{
+        u8 r;
+        /* clear 'F4 Video Configuration Trap' bit */
+        pci_read_config_byte(dev, 0x42, &r);
+        r &= 0xfd;
+        pci_write_config_byte(dev, 0x42, r);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
+                        pci_early_fixup_cyrix_5530);