PCI/x86: fix up PCI stuff so that PCI_GOANY supports OLPC

Previously, one would have to specifically choose CONFIG_OLPC and
CONFIG_PCI_GOOLPC in order to enable PCI_OLPC.  That doesn't really work
for distro kernels, so this patch allows one to choose CONFIG_OLPC and
CONFIG_PCI_GOANY in order to build in OLPC support in a generic kernel (as
requested by Robert Millan).

This also moves GOOLPC before GOANY in the menuconfig list.

Finally, make pci_access_init return early if we detect OLPC hardware.
There's no need to continue probing stuff, and pci_pcbios_init
specifically trashes our settings (we didn't run into that before because
PCI_GOANY wasn't supported).

Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index dcbec34..52e18e6 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1508,13 +1508,13 @@ config PCI_GOMMCONFIG
 config PCI_GODIRECT
        bool "Direct"
 
-config PCI_GOANY
-       bool "Any"
-
 config PCI_GOOLPC
        bool "OLPC"
        depends on OLPC
 
+config PCI_GOANY
+       bool "Any"
+
 endchoice
 
 config PCI_BIOS
@@ -1531,9 +1531,8 @@ config PCI_MMCONFIG
        depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
 
 config PCI_OLPC
-       bool
-       depends on PCI && PCI_GOOLPC
-       default y
+       def_bool y
+       depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
 
 config PCI_DOMAINS
        def_bool y

diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
index e70b9c5..b821f44 100644 (file)
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -15,7 +15,8 @@ static __init int pci_access_init(void)
        pci_mmcfg_early_init();
 
 #ifdef CONFIG_PCI_OLPC
-       pci_olpc_init();
+       if (!pci_olpc_init())
+               return 0;       /* skip additional checks if it's an XO */
 #endif
 #ifdef CONFIG_PCI_BIOS
        pci_pcbios_init();

diff --git a/arch/x86/pci/olpc.c b/arch/x86/pci/olpc.c
index 5e76365..e11e9e8 100644 (file)
--- a/arch/x86/pci/olpc.c
+++ b/arch/x86/pci/olpc.c
@@ -302,12 +302,13 @@ static struct pci_raw_ops pci_olpc_conf = {
        .write = pci_olpc_write,
 };
 
-void __init pci_olpc_init(void)
+int __init pci_olpc_init(void)
 {
        if (!machine_is_olpc() || olpc_has_vsa())
-               return;
+               return -ENODEV;
 
        printk(KERN_INFO "PCI: Using configuration type OLPC\n");
        raw_pci_ops = &pci_olpc_conf;
        is_lx = is_geode_lx();
+       return 0;
 }

diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h
index f3972b1..720c4c5 100644 (file)
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -101,7 +101,7 @@ extern struct pci_raw_ops pci_direct_conf1;
 extern int pci_direct_probe(void);
 extern void pci_direct_init(int type);
 extern void pci_pcbios_init(void);
-extern void pci_olpc_init(void);
+extern int pci_olpc_init(void);
 
 /* pci-mmconfig.c */