ACPI: fix two IRQ8 issues in IOAPIC mode

Use mp_irqs[] to get PNP device's interrupt polarity and trigger.
There are two reasons to do this:
1. BIOS bug for PNP interrupt
2. BIOS explictly does override
mp_irqs[] should cover all the cases.

http://bugzilla.kernel.org/show_bug.cgi?id=5243
http://bugzilla.kernel.org/show_bug.cgi?id=7679
http://bugzilla.kernel.org/show_bug.cgi?id=9153

[lenb: fixed !IOAPIC and 64-bit !SMP builds]

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 953328b55a30..435a8c9b55f8 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -546,7 +546,7 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
 #define default_PCI_trigger(idx)        (1)
 #define default_PCI_polarity(idx)       (1)
 
-static int __init MPBIOS_polarity(int idx)
+static int MPBIOS_polarity(int idx)
 {
         int bus = mp_irqs[idx].mpc_srcbus;
         int polarity;
@@ -2222,8 +2222,27 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int p
         return 0;
 }
 
-#endif /* CONFIG_ACPI */
 
+int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
+{
+        int i;
+
+        if (skip_ioapic_setup)
+                return -1;
+
+        for (i = 0; i < mp_irq_entries; i++)
+                if (mp_irqs[i].mpc_irqtype == mp_INT &&
+                    mp_irqs[i].mpc_srcbusirq == bus_irq)
+                        break;
+        if (i >= mp_irq_entries)
+                return -1;
+
+        *trigger = irq_trigger(i);
+        *polarity = irq_polarity(i);
+        return 0;
+}
+
+#endif /* CONFIG_ACPI */
 
 /*
  * This function currently is only a helper for the i386 smp boot process where
@@ -2260,3 +2279,4 @@ void __init setup_ioapic_dest(void)
         }
 }
 #endif
+