From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 30 Jan 2008 12:33:24 +0000 (+0100)
Subject: genirq: stackdump after the "Trying to free already-free IRQ" message
X-Git-Tag: v2.6.25-rc1~1143^2~217
X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=70edcd77a0d6d0f8731c826764f5eb6732f521e9

genirq: stackdump after the "Trying to free already-free IRQ" message

these bugs are harder to find than they seem, a stackdump helps.

make it dependent on CONFIG_DEBUG_SHIRQ so that people can turn it off
if it annoys them.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 1f314221d534..438a01464287 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -479,6 +479,9 @@ void free_irq(unsigned int irq, void *dev_id)
 			return;
 		}
 		printk(KERN_ERR "Trying to free already-free IRQ %d\n", irq);
+#ifdef CONFIG_DEBUG_SHIRQ
+		dump_stack();
+#endif
 		spin_unlock_irqrestore(&desc->lock, flags);
 		return;
 	}