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
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1508,13 +1508,13 @@
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 @@
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
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -15,7 +15,8 @@
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
--- a/arch/x86/pci/olpc.c
+++ b/arch/x86/pci/olpc.c
@@ -302,12 +302,13 @@
.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
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -101,7 +101,7 @@
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 */