x86/pci: AMD one chain system to use pci read out res

Found MSI amd k8 based laptops is hiding [0x70000000, 0x80000000) RAM
from e820.

enable amd one chain even for all.

-v2: use bool for found, according to Andrew

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-6-git-send-email-yinghai@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

3 files changed, 4 insertions, 9 deletions

diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index 2356ea18697d..ae50b8fa0c60 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -87,11 +87,12 @@ static int __init early_fill_mp_bus_info(void)
         struct range range[RANGE_NUM];
         u64 val;
         u32 address;
+        bool found;
 
         if (!early_pci_allowed())
                 return -1;
 
-        found_all_numa_early = 0;
+        found = false;
         for (i = 0; i < ARRAY_SIZE(pci_probes); i++) {
                 u32 id;
                 u16 device;
@@ -105,12 +106,12 @@ static int __init early_fill_mp_bus_info(void)
                 device = (id>>16) & 0xffff;
                 if (pci_probes[i].vendor == vendor &&
                     pci_probes[i].device == device) {
-                        found_all_numa_early = 1;
+                        found = true;
                         break;
                 }
         }
 
-        if (!found_all_numa_early)
+        if (!found)
                 return 0;
 
         pci_root_num = 0;
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index 30f65cecd65f..3411687b676e 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -5,7 +5,6 @@
 
 int pci_root_num;
 struct pci_root_info pci_root_info[PCI_ROOT_NR];
-int found_all_numa_early;
 
 void x86_pci_root_bus_res_quirks(struct pci_bus *b)
 {
@@ -21,10 +20,6 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b)
         if (!pci_root_num)
                 return;
 
-        /* for amd, if only one root bus, don't need to do anything */
-        if (pci_root_num < 2 && found_all_numa_early)
-                return;
-
         for (i = 0; i < pci_root_num; i++) {
                 if (pci_root_info[i].bus_min == b->number)
                         break;
diff --git a/arch/x86/pci/bus_numa.h b/arch/x86/pci/bus_numa.h
index 374ecc5ead42..f63e80294f22 100644
--- a/arch/x86/pci/bus_numa.h
+++ b/arch/x86/pci/bus_numa.h
@@ -20,7 +20,6 @@ struct pci_root_info {
 #define PCI_ROOT_NR 4
 extern int pci_root_num;
 extern struct pci_root_info pci_root_info[PCI_ROOT_NR];
-extern int found_all_numa_early;
 
 extern void update_res(struct pci_root_info *info, resource_size_t start,
                       resource_size_t end, unsigned long flags, int merge);