From: Ingo Molnar <mingo@elte.hu>
Date: Sun, 26 Mar 2006 09:36:54 +0000 (-0800)
Subject: [PATCH] warn if free_irq() is called from IRQ context
X-Git-Tag: firefly_0821_release~37081
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cd7b24bb1891a10ee25168a912ff2304a9571d23;p=firefly-linux-kernel-4.4.55.git

[PATCH] warn if free_irq() is called from IRQ context

Warn if free_irq() is called in IRQ context - free_irq() can execute /proc
VFS work, which must not be done in IRQ context.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 6edfcef291e8..ac766ad573e8 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -271,6 +271,7 @@ void free_irq(unsigned int irq, void *dev_id)
 	struct irqaction **p;
 	unsigned long flags;
 
+	WARN_ON(in_interrupt());
 	if (irq >= NR_IRQS)
 		return;