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>

diff --git a/drivers/rtc/rtc-ac100.c b/drivers/rtc/rtc-ac100.c
index 2d0bb02a25d952fe1ea08e6b412fc0ad5ebe5379..9e336184491cbd1b1e80c47cddbf346c24665a63 100644 (file)
--- 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;