x86: Add pcibios_fixup_irqs to x86_init

Platforms like Moorestown want to override the pcibios_fixup_irqs
default function. Add it to x86_init.pci.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D00@orsmsx508.amr.corp.intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/include/asm/pci_x86.h

@@ -113,6 +113,7 @@ extern int __init pci_acpi_init(void);
 extern void __init pcibios_irq_init(void);
 extern int __init pcibios_init(void);
 extern int pci_legacy_init(void);
+extern void pcibios_fixup_irqs(void);
 
 /* pci-mmconfig.c */
 
@@ -188,7 +189,9 @@ static inline void mmio_config_writel(void __iomem *pos, u32 val)
 #  define x86_default_pci_init		pci_legacy_init
 # endif
 # define x86_default_pci_init_irq	pcibios_irq_init
+# define x86_default_pci_fixup_irqs	pcibios_fixup_irqs
 #else
 # define x86_default_pci_init		NULL
 # define x86_default_pci_init_irq	NULL
+# define x86_default_pci_fixup_irqs	NULL
 #endif

arch/x86/include/asm/x86_init.h

@@ -102,10 +102,12 @@ struct x86_init_iommu {
   * struct x86_init_pci - platform specific pci init functions
  * @init:			platform specific pci init
  * @init_irq:			platform specific pci irq init
+ * @fixup_irqs:			platform specific pci irq fixup
  */
 struct x86_init_pci {
 	int (*init)(void);
 	void (*init_irq)(void);
+	void (*fixup_irqs)(void);
 };
 
 /**

arch/x86/kernel/x86_init.c

@@ -4,6 +4,7 @@
  *  For licencing details see kernel-base/COPYING
  */
 #include <linux/init.h>
+#include <linux/ioport.h>
 
 #include <asm/bios_ebda.h>
 #include <asm/paravirt.h>
@@ -75,6 +76,7 @@ struct x86_init_ops x86_init __initdata = {
 	.pci = {
 		.init			= x86_default_pci_init,
 		.init_irq		= x86_default_pci_init_irq,
+		.fixup_irqs		= x86_default_pci_fixup_irqs,
 	},
 };
 

arch/x86/pci/irq.c

@@ -1016,7 +1016,7 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
 	return 1;
 }
 
-static void __init pcibios_fixup_irqs(void)
+void __init pcibios_fixup_irqs(void)
 {
 	struct pci_dev *dev = NULL;
 	u8 pin;
@@ -1142,7 +1142,7 @@ void __init pcibios_irq_init(void)
 			pirq_table = NULL;
 	}
 
-	pcibios_fixup_irqs();
+	x86_init.pci.fixup_irqs();
 
 	if (io_apic_assign_pci_irqs && pci_routeirq) {
 		struct pci_dev *dev = NULL;