linux-kernel - [PATCH 3.12 042/212] gpio: mvebu: make mvchip->irqbase signed for error handling

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Message-Id: <20131202191253.067139399@linuxfoundation.org>
Date:	Mon,  2 Dec 2013 11:13:53 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 3.12 042/212] gpio: mvebu: make mvchip->irqbase signed for error handling

3.12-stable review patch.  If anyone has any objections, please let me know.

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

From: Dan Carpenter <dan.carpenter@...cle.com>

commit d535922691fc026479fcc03e78ac3d931a54e75a upstream.

There is a bug in mvebu_gpio_probe() where we do:

	mvchip->irqbase = irq_alloc_descs(-1, 0, ngpios, -1);
	if (mvchip->irqbase < 0) {

The problem is that mvchip->irqbase is unsigned so the error handling
doesn't work.  I have changed it to be a regular int.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/gpio-mvebu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -79,7 +79,7 @@ struct mvebu_gpio_chip {
 	spinlock_t	   lock;
 	void __iomem	  *membase;
 	void __iomem	  *percpu_membase;
-	unsigned int       irqbase;
+	int		   irqbase;
 	struct irq_domain *domain;
 	int                soc_variant;
 };


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