hwspinlock: fix return value check in stm32_hwspinlock_probe()

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")
Acked-by: Benjamin Gaignard <benjamin.gaignard@gmail.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
index 34a8e009dc93c03f3ebdc5a71f7950e04986a5fa..44183928889357987178373c1f6e8665eb7fca46 100644 (file)
--- 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);