linux-kernel - [PATCH] gpio: brcmstb: check return value of gpiochip_irqchip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1502319087-23396-1-git-send-email-yamada.masahiro@socionext.com>
Date:   Thu, 10 Aug 2017 07:51:27 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-gpio@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org,
        Brian Norris <computersforpeace@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Gregory Fong <gregory.0xf0@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] gpio: brcmstb: check return value of gpiochip_irqchip_add()

Because gpiochip_irqchip_add() may fail, its return value should
be checked.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 drivers/gpio/gpio-brcmstb.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index e6489143721a..51485997f680 100644
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -339,6 +339,7 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
 	struct brcmstb_gpio_priv *priv = bank->parent_priv;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
+	int err;
 
 	bank->irq_chip.name = dev_name(dev);
 	bank->irq_chip.irq_mask = brcmstb_gpio_irq_mask;
@@ -355,8 +356,6 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
 			dev_warn(dev,
 				"Couldn't get wake IRQ - GPIOs will not be able to wake from sleep");
 		} else {
-			int err;
-
 			/*
 			 * Set wakeup capability before requesting wakeup
 			 * interrupt, so we can process boot-time "wakeups"
@@ -383,8 +382,10 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
 	if (priv->can_wake)
 		bank->irq_chip.irq_set_wake = brcmstb_gpio_irq_set_wake;
 
-	gpiochip_irqchip_add(&bank->gc, &bank->irq_chip, 0,
-			handle_simple_irq, IRQ_TYPE_NONE);
+	err = gpiochip_irqchip_add(&bank->gc, &bank->irq_chip, 0,
+				   handle_simple_irq, IRQ_TYPE_NONE);
+	if (err)
+		return err;
 	gpiochip_set_chained_irqchip(&bank->gc, &bank->irq_chip,
 			priv->parent_irq, brcmstb_gpio_irq_handler);
 
-- 
2.7.4