| Message ID | 20210409140806.31824-4-srinivas.neeli@xilinx.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | gpio: zynq: Update on gpio zynq driver | expand |
On Fri, Apr 09, 2021 at 07:38:06PM +0530, Srinivas Neeli wrote: > 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> > --- > 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"); It will be useful to include a tag such as "suspend: " in the error message to uniquely identify where it failed from. > + 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"); Ditto. Suggest using "resume: " tag here. > + return -EINVAL; > + } > + > if (!device_may_wakeup(dev)) > enable_irq(gpio->irq); > > -- > 2.9.1 >
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);
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> --- drivers/gpio/gpio-zynq.c | 10 ++++++++++ 1 file changed, 10 insertions(+)