diff options
| -rw-r--r-- | arch/parisc/kernel/irq.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index c0b1affc06a8..88934b37761d 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -336,8 +336,8 @@ void do_cpu_irq_mask(struct pt_regs *regs) struct pt_regs *old_regs; unsigned long eirr_val; int irq, cpu = smp_processor_id(); -#ifdef CONFIG_SMP struct irq_desc *desc; +#ifdef CONFIG_SMP cpumask_t dest; #endif @@ -350,8 +350,12 @@ void do_cpu_irq_mask(struct pt_regs *regs) goto set_out; irq = eirr_to_irq(eirr_val); -#ifdef CONFIG_SMP + /* Filter out spurious interrupts, mostly from serial port at bootup */ desc = irq_to_desc(irq); + if (unlikely(!desc->action)) + goto set_out; + +#ifdef CONFIG_SMP cpumask_copy(&dest, desc->irq_data.affinity); if (irqd_is_per_cpu(&desc->irq_data) && !cpu_isset(smp_processor_id(), dest)) { |