linux-kernel - [PATCH 09/21] apbps2: use devm_irq_of_parse_and

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Date:	Wed,  4 Jun 2014 15:13:09 +0400
From:	nyushchenko@....rtsoft.ru
To:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	devicetree@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, lugovskoy@....rtsoft.ru,
	Nikita Yushchenko <nyushchenko@....rtsoft.ru>
Subject: [PATCH 09/21] apbps2: use devm_irq_of_parse_and_map()

From: Nikita Yushchenko <nyushchenko@....rtsoft.ru>

This avoids leak of IRQ mapping on error paths, and makes it possible
to use devm_request_irq() without facing unmap-while-handler-installed
issues.

Signed-off-by: Nikita Yushchenko <nyushchenko@....rtsoft.ru>
---
 drivers/input/serio/apbps2.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/input/serio/apbps2.c b/drivers/input/serio/apbps2.c
index 17e01a8..e8d0b8e 100644
--- a/drivers/input/serio/apbps2.c
+++ b/drivers/input/serio/apbps2.c
@@ -155,7 +155,11 @@ static int apbps2_of_probe(struct platform_device *ofdev)
 	iowrite32be(0, &priv->regs->ctrl);
 
 	/* IRQ */
-	irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
+	irq = devm_irq_of_parse_and_map(&ofdev->dev, ofdev->dev.of_node, 0);
+	if (irq <= 0) {
+		dev_err(&ofdev->dev, "unable to locate IRQ\n");
+		return irq ? irq  : -EINVAL;
+	}
 	err = devm_request_irq(&ofdev->dev, irq, apbps2_isr,
 				IRQF_SHARED, "apbps2", priv);
 	if (err) {
-- 
1.7.10.4

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