1 files changed, 5 insertions, 2 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 2627a81253ee..81aa73b8ecf5 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -199,7 +199,7 @@ static void acpi_register_lapic(int id, u8 enabled)
 {
         unsigned int ver = 0;
 
-        if (id >= (MAX_LOCAL_APIC-1)) {
+        if (id >= MAX_LOCAL_APIC) {
                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
                 return;
         }
@@ -1120,6 +1120,7 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
         int ioapic;
         int ioapic_pin;
         struct io_apic_irq_attr irq_attr;
+        int ret;
 
         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
                 return gsi;
@@ -1149,7 +1150,9 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
-        io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
+        ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
+        if (ret < 0)
+                gsi = INT_MIN;
 
         return gsi;
 }