linux-kernel - [054/103] mfd: Ignore non-GPIO IRQs when setting wm831x IRQ types

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Message-Id: <20101022185232.195843808@clark.site>
Date:	Fri, 22 Oct 2010 11:51:28 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: [054/103] mfd: Ignore non-GPIO IRQs when setting wm831x IRQ types

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Mark Brown <broonie@...nsource.wolfsonmicro.com>

commit c9d66d3515bbb0ad8062721487de7ade02d2b936 upstream.

The driver was originally tested with an additional patch which
made this unneeded but that patch had issuges and got lost on the
way to mainline, causing problems when the errors are reported.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mfd/wm831x-irq.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/mfd/wm831x-irq.c
+++ b/drivers/mfd/wm831x-irq.c
@@ -394,8 +394,13 @@ static int wm831x_irq_set_type(unsigned
 
 	irq = irq - wm831x->irq_base;
 
-	if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11)
-		return -EINVAL;
+	if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11) {
+		/* Ignore internal-only IRQs */
+		if (irq >= 0 && irq < WM831X_NUM_IRQS)
+			return 0;
+		else
+			return -EINVAL;
+	}
 
 	switch (type) {
 	case IRQ_TYPE_EDGE_BOTH:


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