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Subject[PATCH] x86/pci: don't check mmconf again if it is from MSR with amd faml0h

for AMD Fam10h, it we read mmconf from MSR early, we should just trust it
because we check it and correct it already.

so skip the reject check there.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

---
arch/x86/pci/mmconfig-shared.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -168,6 +168,7 @@ static const char __init *pci_mmcfg_inte
return "Intel Corporation 945G/GZ/P/PL Express Memory Controller Hub";
}

+static int __initdata amd_fam10h_mmconf_found_via_hostbridge;
static const char __init *pci_mmcfg_amd_fam10h(void)
{
u32 low, high, address;
@@ -215,6 +216,8 @@ static const char __init *pci_mmcfg_amd_
return NULL;
}

+ amd_fam10h_mmconf_found_via_hostbridge = 1;
+
return "AMD Family 10h NB";
}

@@ -606,7 +609,12 @@ static void __init __pci_mmcfg_init(int
if (!known_bridge)
acpi_sfi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg);

- pci_mmcfg_reject_broken(early);
+ /*
+ * if it is amd fam10h, and that is read from msr,
+ * we don't need check them again.
+ */
+ if (!amd_fam10h_mmconf_found_via_hostbridge)
+ pci_mmcfg_reject_broken(early);

if (list_empty(&pci_mmcfg_list))
return;

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