From 40ee9e9f8d52d85f2446bbdda7823a3f1de62f3f Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Sat, 24 Mar 2007 11:03:32 -0700
Subject: [PATCH] PCI: fix sysfs rom file creation for BIOS ROM shadows
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>
---
arch/i386/pci/fixup.c | 2 +-
drivers/pci/pci-sysfs.c | 5 +++--
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index 8053b17ab6475..b62eafb997bce 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -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.
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index cd913a2a416f0..29676fe4f23e1 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -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);
--
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