From b738a50a202639614c98b5763b01bf9201779e50 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 2 Feb 2011 23:58:19 +0100
Subject: [PATCH] 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>
---
kernel/irq/handle.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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;
}
--
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