linux-kernel - [PATCH v2 1/1] pinctrl: wpcm450: Correct the fwnode_irq

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: <20220927175509.15695-1-andriy.shevchenko@linux.intel.com>
Date:   Tue, 27 Sep 2022 20:55:09 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        openbmc@...ts.ozlabs.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 1/1] pinctrl: wpcm450: Correct the fwnode_irq_get() return value check

fwnode_irq_get() can return zero to indicate IRQ mapping errors.
Handle this case by skipping the interrupt resource.

Fixes: a1d1e0e3d80a ("pinctrl: nuvoton: Add driver for WPCM450")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
v2: amended commit message (Jonathan)
 drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
index 0dbeb91f0bf2..8193b92da403 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -1081,10 +1081,13 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 
 		girq->num_parents = 0;
 		for (i = 0; i < WPCM450_NUM_GPIO_IRQS; i++) {
-			int irq = fwnode_irq_get(child, i);
+			int irq;
 
+			irq = fwnode_irq_get(child, i);
 			if (irq < 0)
 				break;
+			if (!irq)
+				continue;
 
 			girq->parents[i] = irq;
 			girq->num_parents++;
-- 
2.35.1