8 files changed, 84 insertions, 64 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b2dd3dc32fd..cdd5b934f43 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1522,6 +1522,8 @@ and is between 256 and 4096 characters. It is defined in the file
                                 This is normally done in pci_enable_device(),
                                 so this option is a temporary workaround
                                 for broken drivers that don't call it.
+                skip_isa_align  [X86] do not align io start addr, so can
+                                handle more pci cards
                 firmware        [ARM] Do not re-enumerate the bus but instead
                                 just use the configuration from the
                                 bootloader. This is currently used on
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 1a9c0c6a1a1..d95de2f199c 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -6,45 +6,6 @@
 #include <asm/numa.h>
 #include "pci.h"
 
-static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
-{
-        pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
-        printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
-        return 0;
-}
-
-static struct dmi_system_id acpi_pciprobe_dmi_table[] __devinitdata = {
-/*
- * Systems where PCI IO resource ISA alignment can be skipped
- * when the ISA enable bit in the bridge control is not set
- */
-        {
-                .callback = can_skip_ioresource_align,
-                .ident = "IBM System x3800",
-                .matches = {
-                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
-                },
-        },
-        {
-                .callback = can_skip_ioresource_align,
-                .ident = "IBM System x3850",
-                .matches = {
-                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
-                },
-        },
-        {
-                .callback = can_skip_ioresource_align,
-                .ident = "IBM System x3950",
-                .matches = {
-                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
-                },
-        },
-        {}
-};
-
 struct pci_root_info {
         char *name;
         unsigned int res_num;
@@ -196,8 +157,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
         int pxm;
 #endif
 
-        dmi_check_system(acpi_pciprobe_dmi_table);
-
         if (domain && !pci_domains_supported) {
                 printk(KERN_WARNING "PCI: Multiple domains not supported "
                        "(dom %d, bus %d)\n", domain, busnum);
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 2a4d751818b..bfa72a9475b 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -90,6 +90,50 @@ static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
                 rom_r->start = rom_r->end = rom_r->flags = 0;
 }
 
+static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
+{
+        pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
+        printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
+        return 0;
+}
+
+static struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitdata = {
+/*
+ * Systems where PCI IO resource ISA alignment can be skipped
+ * when the ISA enable bit in the bridge control is not set
+ */
+        {
+                .callback = can_skip_ioresource_align,
+                .ident = "IBM System x3800",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
+                },
+        },
+        {
+                .callback = can_skip_ioresource_align,
+                .ident = "IBM System x3850",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
+                },
+        },
+        {
+                .callback = can_skip_ioresource_align,
+                .ident = "IBM System x3950",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
+                },
+        },
+        {}
+};
+
+void __init dmi_check_skip_isa_align(void)
+{
+        dmi_check_system(can_skip_pciprobe_dmi_table);
+}
+
 /*
  *  Called after each bus is probed, but before its children
  *  are examined.
@@ -318,13 +362,16 @@ static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = {
         {}
 };
 
+void __init dmi_check_pciprobe(void)
+{
+        dmi_check_system(pciprobe_dmi_table);
+}
+
 struct pci_bus * __devinit pcibios_scan_root(int busnum)
 {
         struct pci_bus *bus = NULL;
         struct pci_sysdata *sd;
 
-        dmi_check_system(pciprobe_dmi_table);
-
         while ((bus = pci_find_next_bus(bus)) != NULL) {
                 if (bus->number == busnum) {
                         /* Already scanned */
@@ -462,6 +509,9 @@ char * __devinit  pcibios_setup(char *str)
         } else if (!strcmp(str, "routeirq")) {
                 pci_routeirq = 1;
                 return NULL;
+        } else if (!strcmp(str, "skip_isa_align")) {
+                pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
+                return NULL;
         }
         return str;
 }
@@ -489,7 +539,7 @@ void pcibios_disable_device (struct pci_dev *dev)
                 pcibios_disable_irq(dev);
 }
 
-struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
+struct pci_bus * __devinit pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
 {
         struct pci_bus *bus = NULL;
         struct pci_sysdata *sd;
@@ -512,7 +562,7 @@ struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
         return bus;
 }
 
-struct pci_bus *pci_scan_bus_with_sysdata(int busno)
+struct pci_bus * __devinit pci_scan_bus_with_sysdata(int busno)
 {
         return pci_scan_bus_on_node(busno, &pci_root_ops, -1);
 }
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index b60b2abd480..ff3a6a33634 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -502,7 +502,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
  */
 static void fam10h_pci_cfg_space_size(struct pci_dev *dev)
 {
-        dev->cfg_size = pci_cfg_space_size_ext(dev, 0);
+        dev->cfg_size = pci_cfg_space_size_ext(dev);
 }
 
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1200, fam10h_pci_cfg_space_size);
diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
index dd30c6076b5..e70b9c57b88 100644
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -33,6 +33,10 @@ static __init int pci_access_init(void)
                 printk(KERN_ERR
                 "PCI: Fatal: No config space access function found\n");
 
+        dmi_check_pciprobe();
+
+        dmi_check_skip_isa_align();
+
         return 0;
 }
 arch_initcall(pci_access_init);
diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h
index c58805a92db..f3972b12c60 100644
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -38,6 +38,9 @@ enum pci_bf_sort_state {
         pci_dmi_bf,
 };
 
+extern void __init dmi_check_pciprobe(void);
+extern void __init dmi_check_skip_isa_align(void);
+
 /* pci-i386.c */
 
 extern unsigned int pcibios_max_latency;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 4a55bf38095..3706ce7972d 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -842,13 +842,25 @@ static void set_pcie_port_type(struct pci_dev *pdev)
  * reading the dword at 0x100 which must either be 0 or a valid extended
  * capability header.
  */
-int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix)
+int pci_cfg_space_size_ext(struct pci_dev *dev)
 {
-        int pos;
         u32 status;
 
-        if (!check_exp_pcix)
-                goto skip;
+        if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL)
+                goto fail;
+        if (status == 0xffffffff)
+                goto fail;
+
+        return PCI_CFG_SPACE_EXP_SIZE;
+
+ fail:
+        return PCI_CFG_SPACE_SIZE;
+}
+
+int pci_cfg_space_size(struct pci_dev *dev)
+{
+        int pos;
+        u32 status;
 
         pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
         if (!pos) {
@@ -861,23 +873,12 @@ int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix)
                         goto fail;
         }
 
- skip:
-        if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL)
-                goto fail;
-        if (status == 0xffffffff)
-                goto fail;
-
-        return PCI_CFG_SPACE_EXP_SIZE;
+        return pci_cfg_space_size_ext(dev);
 
  fail:
         return PCI_CFG_SPACE_SIZE;
 }
 
-int pci_cfg_space_size(struct pci_dev *dev)
-{
-        return pci_cfg_space_size_ext(dev, 1);
-}
-
 static void pci_release_bus_bridge_dev(struct device *dev)
 {
         kfree(dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 96acd0dae24..509159bcd4e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -44,6 +44,7 @@
 #include <linux/mod_devicetable.h>
 
 #include <linux/types.h>
+#include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/list.h>
 #include <linux/compiler.h>
@@ -474,7 +475,7 @@ extern struct pci_bus *pci_find_bus(int domain, int busnr);
 void pci_bus_add_devices(struct pci_bus *bus);
 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
                                       struct pci_ops *ops, void *sysdata);
-static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
+static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
                                            void *sysdata)
 {
         struct pci_bus *root_bus;
@@ -666,7 +667,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
 
 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
                   void *userdata);
-int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix);
+int pci_cfg_space_size_ext(struct pci_dev *dev);
 int pci_cfg_space_size(struct pci_dev *dev);
 unsigned char pci_bus_max_busnr(struct pci_bus *bus);