linux-kernel - [PATCH] gpio-tz1090: fix error handling of irq_of_parse_and

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Date:	Fri, 14 Nov 2014 13:32:56 -0800
From:	Dmitry Torokhov <dtor@...omium.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	James Hogan <james.hogan@...tec.com>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio-tz1090: fix error handling of irq_of_parse_and_map

irq_of_parse_and_map() returns 0 on error, so testing for negative
result never works.

Signed-off-by: Dmitry Torokhov <dtor@...omium.org>
---

Not tested, found by casual inspection of the code.

 drivers/gpio/gpio-tz1090.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-tz1090.c b/drivers/gpio/gpio-tz1090.c
index 9e90177..e3024bb 100644
--- a/drivers/gpio/gpio-tz1090.c
+++ b/drivers/gpio/gpio-tz1090.c
@@ -446,7 +446,7 @@ static int tz1090_gpio_bank_probe(struct tz1090_gpio_bank_info *info)
 	bank->irq = irq_of_parse_and_map(np, 0);
 
 	/* The interrupt is optional (it may be used by another core on chip) */
-	if (bank->irq < 0) {
+	if (!bank->irq) {
 		dev_info(dev, "IRQ not provided for bank %u, IRQs disabled\n",
 			 info->index);
 		return 0;
-- 
2.1.0.rc2.206.gedb03e5


-- 
Dmitry
--
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