rtc: ac100: Add NULL checking for devm_kzalloc call

devm_kzalloc can return NULL, add NULL checking to prevent NULL pointer
dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-ac100.c b/drivers/rtc/rtc-ac100.c
index 2d0bb02a25d9..9e336184491c 100644
--- a/drivers/rtc/rtc-ac100.c
+++ b/drivers/rtc/rtc-ac100.c
@@ -554,6 +554,9 @@ static int ac100_rtc_probe(struct platform_device *pdev)
         int ret;
 
         chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
+        if (!chip)
+                return -ENOMEM;
+
         platform_set_drvdata(pdev, chip);
         chip->dev = &pdev->dev;
         chip->regmap = ac100->regmap;