[PATCH 3/3] gpio: zynq: Check return value of irq_get_irq_data

[Srinivas Neeli]

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.ne...@xilinx.com>
---
 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 c91302a16c77..f0cb8ccd03ed 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);
 
-- 
2.9.1