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[IA64] Fix unexpected interrupt vector handling

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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 <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Kenji Kaneshige 2007-08-28 16:01:21 -07:00 committed by Tony Luck
parent b07d68b5ca
commit 17764d2437
1 changed files with 22 additions and 6 deletions
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28
arch/ia64/kernel/irq_ia64.c
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@ -82,7 +82,7 @@ struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
}; };
DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = { 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] = { static cpumask_t vector_table[IA64_NUM_VECTORS] = {
@ -179,7 +179,7 @@ static void __clear_irq_vector(int irq)
domain = cfg->domain; domain = cfg->domain;
cpus_and(mask, cfg->domain, cpu_online_map); cpus_and(mask, cfg->domain, cpu_online_map);
for_each_cpu_mask(cpu, mask) 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->vector = IRQ_VECTOR_UNASSIGNED;
cfg->domain = CPU_MASK_NONE; cfg->domain = CPU_MASK_NONE;
irq_status[irq] = IRQ_UNUSED; irq_status[irq] = IRQ_UNUSED;
@ -249,7 +249,7 @@ void __setup_vector_irq(int cpu)
/* Clear vector_irq */ /* Clear vector_irq */
for (vector = 0; vector < IA64_NUM_VECTORS; ++vector) 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 */ /* Mark the inuse vectors */
for (irq = 0; irq < NR_IRQS; ++irq) { for (irq = 0; irq < NR_IRQS; ++irq) {
if (!cpu_isset(cpu, irq_cfg[irq].domain)) 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))) } else if (unlikely(IS_RESCHEDULE(vector)))
kstat_this_cpu.irqs[vector]++; kstat_this_cpu.irqs[vector]++;
else { else {
int irq = local_vector_to_irq(vector);
ia64_setreg(_IA64_REG_CR_TPR, vector); ia64_setreg(_IA64_REG_CR_TPR, vector);
ia64_srlz_d(); 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: * Disable interrupts and send EOI:
@ -483,6 +491,7 @@ void ia64_process_pending_intr(void)
kstat_this_cpu.irqs[vector]++; kstat_this_cpu.irqs[vector]++;
else { else {
struct pt_regs *old_regs = set_irq_regs(NULL); struct pt_regs *old_regs = set_irq_regs(NULL);
int irq = local_vector_to_irq(vector);
ia64_setreg(_IA64_REG_CR_TPR, vector); ia64_setreg(_IA64_REG_CR_TPR, vector);
ia64_srlz_d(); ia64_srlz_d();
@ -493,8 +502,15 @@ void ia64_process_pending_intr(void)
* it will work. I hope it works!. * it will work. I hope it works!.
* Probably could shared code. * Probably could shared code.
*/ */
vectors_in_migration[local_vector_to_irq(vector)]=0; if (unlikely(irq < 0)) {
generic_handle_irq(local_vector_to_irq(vector)); 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); set_irq_regs(old_regs);
/* /*