[IA64] Fix unexpected interrupt vector handling
[linux-2.6.git] / arch / ia64 / kernel / irq_ia64.c
index c47c8ac..00a4599 100644 (file)
@@ -82,7 +82,7 @@ struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
 };
 
 DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
-       [0 ... IA64_NUM_VECTORS - 1] = IA64_SPURIOUS_INT_VECTOR
+       [0 ... IA64_NUM_VECTORS - 1] = -1
 };
 
 static cpumask_t vector_table[IA64_NUM_VECTORS] = {
@@ -179,7 +179,7 @@ static void __clear_irq_vector(int irq)
        domain = cfg->domain;
        cpus_and(mask, cfg->domain, cpu_online_map);
        for_each_cpu_mask(cpu, mask)
-               per_cpu(vector_irq, cpu)[vector] = IA64_SPURIOUS_INT_VECTOR;
+               per_cpu(vector_irq, cpu)[vector] = -1;
        cfg->vector = IRQ_VECTOR_UNASSIGNED;
        cfg->domain = CPU_MASK_NONE;
        irq_status[irq] = IRQ_UNUSED;
@@ -249,7 +249,7 @@ void __setup_vector_irq(int cpu)
 
        /* Clear vector_irq */
        for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
-               per_cpu(vector_irq, cpu)[vector] = IA64_SPURIOUS_INT_VECTOR;
+               per_cpu(vector_irq, cpu)[vector] = -1;
        /* Mark the inuse vectors */
        for (irq = 0; irq < NR_IRQS; ++irq) {
                if (!cpu_isset(cpu, irq_cfg[irq].domain))
@@ -432,10 +432,18 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
                } else if (unlikely(IS_RESCHEDULE(vector)))
                        kstat_this_cpu.irqs[vector]++;
                else {
+                       int irq = local_vector_to_irq(vector);
+
                        ia64_setreg(_IA64_REG_CR_TPR, vector);
                        ia64_srlz_d();
 
-                       generic_handle_irq(local_vector_to_irq(vector));
+                       if (unlikely(irq < 0)) {
+                               printk(KERN_ERR "%s: Unexpected interrupt "
+                                      "vector %d on CPU %d is not mapped "
+                                      "to any IRQ!\n", __FUNCTION__, vector,
+                                      smp_processor_id());
+                       } else
+                               generic_handle_irq(irq);
 
                        /*
                         * Disable interrupts and send EOI:
@@ -483,6 +491,7 @@ void ia64_process_pending_intr(void)
                        kstat_this_cpu.irqs[vector]++;
                else {
                        struct pt_regs *old_regs = set_irq_regs(NULL);
+                       int irq = local_vector_to_irq(vector);
 
                        ia64_setreg(_IA64_REG_CR_TPR, vector);
                        ia64_srlz_d();
@@ -493,8 +502,15 @@ void ia64_process_pending_intr(void)
                         * it will work. I hope it works!.
                         * Probably could shared code.
                         */
-                       vectors_in_migration[local_vector_to_irq(vector)]=0;
-                       generic_handle_irq(local_vector_to_irq(vector));
+                       if (unlikely(irq < 0)) {
+                               printk(KERN_ERR "%s: Unexpected interrupt "
+                                      "vector %d on CPU %d not being mapped "
+                                      "to any IRQ!!\n", __FUNCTION__, vector,
+                                      smp_processor_id());
+                       } else {
+                               vectors_in_migration[irq]=0;
+                               generic_handle_irq(irq);
+                       }
                        set_irq_regs(old_regs);
 
                        /*