genirq: Warn when handler enables interrupts

We run all handlers with interrupts disabled and expect them not to
enable them. Warn when we catch one who does.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 3540a7190122..cdd6fbbe771c 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -68,6 +68,9 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
                 ret = action->handler(irq, action->dev_id);
                 trace_irq_handler_exit(irq, action, ret);
 
+                if (WARN_ON_ONCE(!irqs_disabled()))
+                        local_irq_disable();
+
                 switch (ret) {
                 case IRQ_WAKE_THREAD:
                         /*
@@ -114,7 +117,6 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
 
         if (status & IRQF_SAMPLE_RANDOM)
                 add_interrupt_randomness(irq);
-        local_irq_disable();
 
         return retval;
 }