regulator: s5m8767: Prevent possible NULL pointer dereference

s5m8767_pmic_dt_parse_pdata dereferenes pdata, thus check pdata earlier to
avoid NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index ef0532d..8a83194 100644 (file)
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -659,17 +659,17 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
        struct s5m8767_info *s5m8767;
        int i, ret, size, buck_init;
 
+       if (!pdata) {
+               dev_err(pdev->dev.parent, "Platform data not supplied\n");
+               return -ENODEV;
+       }
+
        if (iodev->dev->of_node) {
                ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
                if (ret)
                        return ret;
        }
 
-       if (!pdata) {
-               dev_err(pdev->dev.parent, "Platform data not supplied\n");
-               return -ENODEV;
-       }
-
        if (pdata->buck2_gpiodvs) {
                if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
                        dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");