[Linux-stm32] [PATCH -next] hwspinlock: fix return value check in stm32_hwspinlock_probe()

[Benjamin GAIGNARD]

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 at huawei.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard at gmail.com>
> ---
>   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);
>
>
>