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PCI: fix sysfs rom file creation for BIOS ROM shadows

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At one time, if a BIOS ROM shadow was detected for the boot video
device (stored at offset 0xc0000), we'd set a special resource flag,
IORESOURCE_ROM_SHADOW, so that the sysfs ROM file code could handle
it properly.  That broke along the way somewhere though, so current
kernels will be missing 'rom' files in sysfs if the video device
doesn't have an explicit ROM BAR.

This patch fixes the regression by moving the video fixup quirk to a
little later in the boot cycle (to avoid having its work undone by
PCI resource allocation) and checking in the PCI sysfs code whether
a rom file should be created due to a shadow resource, which is also
moved to a little later in the boot cycle so it will occur after the
video fixup.  Tested and works on my i386 test box.

Signed-off-by:  Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jesse Barnes 2007-03-24 11:03:32 -07:00 committed by Greg Kroah-Hartman
parent 8d7d86e9bd
commit 40ee9e9f8d
2 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/i386/pci/fixup.c
View File

@ -354,7 +354,7 @@ static void __devinit pci_fixup_video(struct pci_dev *pdev)
printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
/*
* Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.

5
drivers/pci/pci-sysfs.c
View File

@ -620,7 +620,8 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
goto err_bin_file;
/* If the device has a ROM, try to expose it in sysfs. */
if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
(pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);
if (rom_attr) {
pdev->rom_attr = rom_attr;
@ -695,4 +696,4 @@ static int __init pci_sysfs_init(void)
return 0;
}
__initcall(pci_sysfs_init);
late_initcall(pci_sysfs_init);