linux-kernel - [PATCH v3] gpio: ath79: Add missing check for platform_get

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Message-Id: <20230605015345.12801-1-jiasheng@iscas.ac.cn>
Date:   Mon,  5 Jun 2023 09:53:45 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     andy.shevchenko@...il.com
Cc:     oe-kbuild-all@...ts.linux.dev, linus.walleij@...aro.org,
        brgl@...ev.pl, palmer@...belt.com, paul.walmsley@...ive.com,
        linux-gpio@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH v3] gpio: ath79: Add missing check for platform_get_irq

Add the missing check for platform_get_irq() and return error
if it fails.

Fixes: 2b8f89e19b6d ("gpio: ath79: Add support for the interrupt controller")

Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
Changelog:

v2 -> v3:

1. Check before assigning values.

v1 -> v2:

1. Return "girq->parents[0]" instead of "-ENODEV".
---
 drivers/gpio/gpio-ath79.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
index aa0a954b8392..d2d838ad33bb 100644
--- a/drivers/gpio/gpio-ath79.c
+++ b/drivers/gpio/gpio-ath79.c
@@ -285,7 +285,10 @@ static int ath79_gpio_probe(struct platform_device *pdev)
 					     GFP_KERNEL);
 		if (!girq->parents)
 			return -ENOMEM;
-		girq->parents[0] = platform_get_irq(pdev, 0);
+		err = platform_get_irq(pdev, 0);
+		if (err < 0)
+			return err;
+		girq->parents[0] = err;
 		girq->default_type = IRQ_TYPE_NONE;
 		girq->handler = handle_simple_irq;
 	}
-- 
2.25.1