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

[Yinghai Lu <yinghai@kernel.org>]

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;