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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Srinivas Neeli <srinivas.neeli@xilinx.com>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        Sasha Levin <sashal@kernel.org>, linux-gpio@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 5.12 065/104] gpio: zynq: Check return value of irq_get_irq_data
Date:   Fri,  9 Jul 2021 22:21:17 -0400
Message-Id: <20210710022156.3168825-65-sashal@kernel.org>
In-Reply-To: <20210710022156.3168825-1-sashal@kernel.org>
References: <20210710022156.3168825-1-sashal@kernel.org>
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From: Srinivas Neeli <srinivas.neeli@xilinx.com>

[ Upstream commit 35d7b72a632bc7afb15356f44005554af8697904 ]

In two different instances the return value of "irq_get_irq_data"
API was neither captured nor checked.
Fixed it by capturing the return value and then checking for any error.

Addresses-Coverity: "returned_null"
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpio-zynq.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index fb8684d70fe3..c288a7502de2 100644
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -736,6 +736,11 @@ static int __maybe_unused zynq_gpio_suspend(struct device *dev)
 	struct zynq_gpio *gpio = dev_get_drvdata(dev);
 	struct irq_data *data = irq_get_irq_data(gpio->irq);
 
+	if (!data) {
+		dev_err(dev, "irq_get_irq_data() failed\n");
+		return -EINVAL;
+	}
+
 	if (!device_may_wakeup(dev))
 		disable_irq(gpio->irq);
 
@@ -753,6 +758,11 @@ static int __maybe_unused zynq_gpio_resume(struct device *dev)
 	struct irq_data *data = irq_get_irq_data(gpio->irq);
 	int ret;
 
+	if (!data) {
+		dev_err(dev, "irq_get_irq_data() failed\n");
+		return -EINVAL;
+	}
+
 	if (!device_may_wakeup(dev))
 		enable_irq(gpio->irq);
 
-- 
2.30.2