PCI: fix pci_fixup_video as it blows up on sparc64

This reverts much of the original pci_fixup_video change and makes it
work for all arches that need it.

fixed, and tested on x86, x86_64 and IA64 dig.

Signed-off-by: Eiichiro Oiwa <eiichiro.oiwa.nm@hitachi.com>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 3 insertions, 48 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index e8a7f1b1b2bc..687ab4a0c6c6 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1619,52 +1619,6 @@ static void __devinit fixup_rev1_53c810(struct pci_dev* dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810);
 
-/*
- * Fixup to mark boot BIOS video selected by BIOS before it changes
- *
- * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
- *
- * The standard boot ROM sequence for an x86 machine uses the BIOS
- * to select an initial video card for boot display. This boot video
- * card will have it's BIOS copied to C0000 in system RAM.
- * IORESOURCE_ROM_SHADOW is used to associate the boot video
- * card with this copy. On laptops this copy has to be used since
- * the main ROM may be compressed or combined with another image.
- * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
- * is marked here since the boot video device will be the only enabled
- * video device at this point.
- */
-
-static void __devinit fixup_video(struct pci_dev *pdev)
-{
-        struct pci_dev *bridge;
-        struct pci_bus *bus;
-        u16 config;
-
-        if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
-                return;
-
-        /* Is VGA routed to us? */
-        bus = pdev->bus;
-        while (bus) {
-                bridge = bus->self;
-                if (bridge) {
-                        pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
-                                                &config);
-                        if (!(config & PCI_BRIDGE_CTL_VGA))
-                                return;
-                }
-                bus = bus->parent;
-        }
-        pci_read_config_word(pdev, PCI_COMMAND, &config);
-        if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
-                pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
-                printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
-        }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_video);
-
-
 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end)
 {
         while (f < end) {
diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c
index 43e4a49f2cc4..e1dcefc69bb4 100644
--- a/drivers/pci/rom.c
+++ b/drivers/pci/rom.c
@@ -72,8 +72,9 @@ void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size)
         int last_image;
 
         /*
-         * IORESOURCE_ROM_SHADOW set if the VGA enable bit of the Bridge Control
-         * register is set for embedded VGA.
+         * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy
+         * memory map if the VGA enable bit of the Bridge Control register is
+         * set for embedded VGA.
          */
         if (res->flags & IORESOURCE_ROM_SHADOW) {
                 /* primary video rom always starts here */