Patch "gpio: zynq: Check return value of irq_get_irq_data" has been added to the 5.13-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    gpio: zynq: Check return value of irq_get_irq_data

to the 5.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-zynq-check-return-value-of-irq_get_irq_data.patch
and it can be found in the queue-5.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bbeb659854119f92d9c9500d315fbec59887e495
Author: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx>
Date:   Fri Apr 9 19:38:06 2021 +0530

    gpio: zynq: Check return value of irq_get_irq_data
    
    [ 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@xxxxxxxxxx>
    Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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);