From jbarnes@virtuousgeek.org Mon Mar 26 13:23:48 2007 From: Jesse Barnes To: gregkh@suse.de, linux-kernel@vger.kernel.org Subject: PCI: fix sysfs rom file creation for BIOS ROM shadows Date: Sat, 24 Mar 2007 11:03:32 -0700 Cc: Eric Anholt Message-Id: <200703241103.33208.jbarnes@virtuousgeek.org> 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 Signed-off-by: Greg Kroah-Hartman --- arch/i386/pci/fixup.c | 2 +- drivers/pci/pci-sysfs.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) --- a/arch/i386/pci/fixup.c +++ b/arch/i386/pci/fixup.c @@ -354,7 +354,7 @@ static void __devinit pci_fixup_video(st 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. --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -617,7 +617,8 @@ int __must_check pci_create_sysfs_dev_fi 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; @@ -691,4 +692,4 @@ static int __init pci_sysfs_init(void) return 0; } -__initcall(pci_sysfs_init); +late_initcall(pci_sysfs_init);