From 4d5a91fd1f42a821d14b92b082b8e71be9911ba5 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 3 Jan 2019 07:02:30 +0000 Subject: 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 Signed-off-by: Wei Yongjun Signed-off-by: Bjorn Andersson --- drivers/hwspinlock/stm32_hwspinlock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/hwspinlock') diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c index 34a8e009dc93..441839288893 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); -- cgit v1.2.3-55-g7522