From 17764d2437b0c4440e0718205f2c26dbaa72bc27 Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Tue, 28 Aug 2007 16:01:21 -0700 Subject: [IA64] Fix unexpected interrupt vector handling Fix handling for spurious interrupts not being mapped to any IRQs. Currently, spurious interrupts that are not mapped to any IRQs are handled as IRQ 15 (== IA64_SPURIOUS_VECTOR). But it is not proper because vector != irq. We need special handlings for such spurious interrupts not being mapped to any IRQs. Signed-off-by: Kenji Kaneshige Signed-off-by: Tony Luck --- arch/ia64/kernel/irq_ia64.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c index c47c8acc96e..00a4599e5f4 100644 --- a/arch/ia64/kernel/irq_ia64.c +++ b/arch/ia64/kernel/irq_ia64.c @@ -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); /* -- cgit v1.2.3-70-g09d2