[ACPI] introduces acpi_penalize_isa_irq() to to avoid PCI

devices use IRQ of legacy PNP devices.
Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

arch/i386/pci/irq.c

@@ -17,6 +17,7 @@
 #include <asm/smp.h>
 #include <asm/io_apic.h>
 #include <asm/hw_irq.h>
+#include <linux/acpi.h>
 
 #include "pci.h"
 
@@ -996,15 +997,26 @@ static int __init pcibios_irq_init(void)
 subsys_initcall(pcibios_irq_init);
 
 
-void pcibios_penalize_isa_irq(int irq)
+static void pirq_penalize_isa_irq(int irq)
 {
 	/*
 	 *  If any ISAPnP device reports an IRQ in its list of possible
 	 *  IRQ's, we try to avoid assigning it to PCI devices.
 	 */
+	if (irq < 16)
 		pirq_penalty[irq] += 100;
 }
 
+void pcibios_penalize_isa_irq(int irq)
+{
+#ifdef CONFIG_ACPI_PCI
+	if (!acpi_noirq)
+		acpi_penalize_isa_irq(irq);
+	else
+#endif
+		pirq_penalize_isa_irq(irq);
+}
+
 int pirq_enable_irq(struct pci_dev *dev)
 {
 	u8 pin;

drivers/acpi/pci_link.c

@@ -786,6 +786,11 @@ static int __init acpi_irq_penalty_update(char *str, int used)
 	return 1;
 }
 
+void acpi_penalize_isa_irq(int irq)
+{
+	acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_USED;
+}
+
 /*
  * Over-ride default table to reserve additional IRQs for use by ISA
  * e.g. acpi_irq_isa=5

drivers/pnp/pnpbios/rsparser.c

@@ -7,6 +7,7 @@
 #include <linux/ctype.h>
 #include <linux/pnp.h>
 #include <linux/pnpbios.h>
+#include <linux/pci.h>
 
 #include "pnpbios.h"
 
@@ -58,6 +59,7 @@ pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq)
 		}
 		res->irq_resource[i].start =
 		res->irq_resource[i].end = (unsigned long) irq;
+		pcibios_penalize_isa_irq(irq);
 	}
 }
 

include/linux/acpi.h

@@ -439,6 +439,7 @@ extern struct acpi_prt_list	acpi_prt;
 struct pci_dev;
 
 int acpi_pci_irq_enable (struct pci_dev *dev);
+void acpi_penalize_isa_irq(int irq);
 
 struct acpi_pci_driver {
 	struct acpi_pci_driver *next;