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Diffstat (limited to 'arch/parisc/kernel/irq.c')
-rw-r--r--arch/parisc/kernel/irq.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index f3191db6e2e9..c0eab24f6a9e 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -507,8 +507,8 @@ 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
@@ -521,8 +521,12 @@ 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) &&
!cpumask_test_cpu(smp_processor_id(), &dest)) {