linux-kernel - [PATCH] [198/223] genirq: Fix incorrect proc spurious output

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Date:	Mon, 13 Dec 2010 00:48:24 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	kaneshige.kenji@...fujitsu.com, ak@...ux.intel.com,
	yong.zhang0@...il.com, tglx@...utronix.de, gregkh@...e.de,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH] [198/223] genirq: Fix incorrect proc spurious output

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>

commit 25c9170ed64a6551beefe9315882f754e14486f4 upstream.

Since commit a1afb637(switch /proc/irq/*/spurious to seq_file) all
/proc/irq/XX/spurious files show the information of irq 0.

Current irq_spurious_proc_open() passes on NULL as the 3rd argument,
which is used as an IRQ number in irq_spurious_proc_show(), to the
single_open(). Because of this, all the /proc/irq/XX/spurious file
shows IRQ 0 information regardless of the IRQ number.

To fix the problem, irq_spurious_proc_open() must pass on the
appropreate data (IRQ number) to single_open().

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Reviewed-by: Yong Zhang <yong.zhang0@...il.com>
LKML-Reference: <4CF4B778.90604@...fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 kernel/irq/proc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/kernel/irq/proc.c
===================================================================
--- linux.orig/kernel/irq/proc.c
+++ linux/kernel/irq/proc.c
@@ -214,7 +214,7 @@ static int irq_spurious_proc_show(struct
 
 static int irq_spurious_proc_open(struct inode *inode, struct file *file)
 {
-	return single_open(file, irq_spurious_proc_show, NULL);
+	return single_open(file, irq_spurious_proc_show, PDE(inode)->data);
 }
 
 static const struct file_operations irq_spurious_proc_fops = {
--
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