[PATCH] i386/x86-64: Only do MCFG e820 check when type 1 works

Needs earlier patch to split type 1 probing from use.

This patch should fix the x86 macs where type 1 PCI config space access
doesn't work, but MCFG does. They also don't have a usable e820 table
so the e820 sanity check failed.

Instead assume now that if type 1 doesn't work then MCFG must work
and don't do the e820 check.

Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
index 44155c5e85d1f4a1b93f8a97f015653970a0a681..2c4f585510c99e1ed12cf6ee04fef421632122c7 100644 (file)
--- a/arch/i386/pci/mmconfig.c
+++ b/arch/i386/pci/mmconfig.c
@@ -198,7 +198,9 @@ void __init pci_mmcfg_init(int type)
            (pci_mmcfg_config[0].base_address == 0))
                return;
 
-       if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
+       /* Only do this check when type 1 works. If it doesn't work
+          assume we run on a Mac and always use MCFG */
+       if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address,
                        pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
                        E820_RESERVED)) {
                printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",

diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index d6b90d08476b1d5f836ff3079b898d86fb69a8f5..8bea51030d665af00acc0df924c50b6845965110 100644 (file)
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -176,7 +176,9 @@ void __init pci_mmcfg_init(int type)
            (pci_mmcfg_config[0].base_address == 0))
                return;
 
-       if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
+       /* Only do this check when type 1 works. If it doesn't work
+           assume we run on a Mac and always use MCFG */
+       if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address,
                        pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
                        E820_RESERVED)) {
                printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",