when __ARCH_HAS_VGA_DEFAULT_DEVICE is not defined, aka EFIFB is not used, for static path, vga_default setting is through vga_arbiter_add_pci_device. and for x86 pci_fixup_video, will skip that. because subsys_initcall(vga_arb_device_init) come first to call vga_arbiter_add_pci_device.
for hotplug path, even vga_arbiter_add_pci_device is called via notifier, but it will check VGA_RSRC_LEGACY_MASK that is not set for hotplug path. So x86 pci_fixup_video will take over to call vga_set_default_device(). We need to hold one dev reference there. otherwise vga_arbiter_del_pci_device that does not check VGA_RSRC_LEGACY_MASK will call put_device and it will cause ref_count to decrease extra. that will have that device get deleted early wrongly. Signed-off-by: Yinghai Lu <[email protected]> Cc: [email protected] --- arch/x86/pci/fixup.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) Index: linux-2.6/arch/x86/pci/fixup.c =================================================================== --- linux-2.6.orig/arch/x86/pci/fixup.c +++ linux-2.6/arch/x86/pci/fixup.c @@ -349,8 +349,12 @@ static void __devinit pci_fixup_video(st if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); - if (!vga_default_device()) + if (!vga_default_device()) { +#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE + pdev = pci_dev_get(pdev); +#endif vga_set_default_device(pdev); + } } } DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
