On 1/3/19 8:02 AM, Wei Yongjun wrote: > In case of error, the function devm_ioremap_resource() returns ERR_PTR() > and never returns NULL. The NULL test in the return value check should > be replaced with IS_ERR(). > > Fixes: f24fcff1d267 ("hwspinlock: add STM32 hwspinlock device") > Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx> Acked-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxx> > --- > drivers/hwspinlock/stm32_hwspinlock.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c > index 34a8e00..4418392 100644 > --- a/drivers/hwspinlock/stm32_hwspinlock.c > +++ b/drivers/hwspinlock/stm32_hwspinlock.c > @@ -57,8 +57,8 @@ static int stm32_hwspinlock_probe(struct platform_device *pdev) > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > io_base = devm_ioremap_resource(&pdev->dev, res); > - if (!io_base) > - return -ENOMEM; > + if (IS_ERR(io_base)) > + return PTR_ERR(io_base); > > array_size = STM32_MUTEX_NUM_LOCKS * sizeof(struct hwspinlock); > hw = devm_kzalloc(&pdev->dev, sizeof(*hw) + array_size, GFP_KERNEL); > > >