x86/acpi: remove irq-compression trick on 32-bit

[net-next-2.6.git] / arch / x86 / kernel / acpi / boot.c

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 6ee96b5530f15e3c056d3fd44d77223ee56cc7db..fb5e88262d207fb26863d4c938803402727b48bb 100644 (file)
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1162,22 +1162,9 @@ int mp_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
 {
        int ioapic;
        int ioapic_pin;
-#ifdef CONFIG_X86_32
-#define MAX_GSI_NUM    4096
-#define IRQ_COMPRESSION_START  64
-
-       static int pci_irq = IRQ_COMPRESSION_START;
-       /*
-        * Mapping between Global System Interrupts, which
-        * represent all possible interrupts, and IRQs
-        * assigned to actual devices.
-        */
-       static int gsi_to_irq[MAX_GSI_NUM];
-#else
 
        if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
                return gsi;
-#endif
 
        /* Don't set up the ACPI SCI because it's already set up */
        if (acpi_gbl_FADT.sci_interrupt == gsi)
@@ -1196,66 +1183,28 @@ int mp_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
                gsi = ioapic_renumber_irq(ioapic, gsi);
 #endif
 
-       /*
-        * Avoid pin reprogramming.  PRTs typically include entries
-        * with redundant pin->gsi mappings (but unique PCI devices);
-        * we only program the IOAPIC on the first.
-        */
        if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
                printk(KERN_ERR "Invalid reference to IOAPIC pin "
                       "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
                       ioapic_pin);
                return gsi;
        }
+
+       /*
+        * Avoid pin reprogramming.  PRTs typically include entries
+        * with redundant pin->gsi mappings (but unique PCI devices);
+        * we only program the IOAPIC on the first.
+        */
        if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
                pr_debug("Pin %d-%d already programmed\n",
                         mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
-#ifdef CONFIG_X86_32
-               return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
-#else
                return gsi;
-#endif
        }
-
        set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
-#ifdef CONFIG_X86_32
-       /*
-        * For GSI >= 64, use IRQ compression
-        */
-       if ((gsi >= IRQ_COMPRESSION_START)
-           && (triggering == ACPI_LEVEL_SENSITIVE)) {
-               /*
-                * For PCI devices assign IRQs in order, avoiding gaps
-                * due to unused I/O APIC pins.
-                */
-               int irq = gsi;
-               if (gsi < MAX_GSI_NUM) {
-                       /*
-                        * Retain the VIA chipset work-around (gsi > 15), but
-                        * avoid a problem where the 8254 timer (IRQ0) is setup
-                        * via an override (so it's not on pin 0 of the ioapic),
-                        * and at the same time, the pin 0 interrupt is a PCI
-                        * type.  The gsi > 15 test could cause these two pins
-                        * to be shared as IRQ0, and they are not shareable.
-                        * So test for this condition, and if necessary, avoid
-                        * the pin collision.
-                        */
-                       gsi = pci_irq++;
-                       /*
-                        * Don't assign IRQ used by ACPI SCI
-                        */
-                       if (gsi == acpi_gbl_FADT.sci_interrupt)
-                               gsi = pci_irq++;
-                       gsi_to_irq[irq] = gsi;
-               } else {
-                       printk(KERN_ERR "GSI %u is too high\n", gsi);
-                       return gsi;
-               }
-       }
-#endif
        io_apic_set_pci_routing(dev, ioapic, ioapic_pin, gsi,
                                triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
                                polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+
        return gsi;
 }