regulator: qcom_smd: add NULL check on of_match_device() return value

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/qcom_smd-regulator.c b/drivers/regulator/qcom_smd-regulator.c
index f35994a2a5be043a88aae22b5a2875cd96de7180..940fe1b784116056039c35cf704fcfdcee5788ea 100644 (file)
--- a/drivers/regulator/qcom_smd-regulator.c
+++ b/drivers/regulator/qcom_smd-regulator.c
@@ -570,6 +570,11 @@ static int rpm_reg_probe(struct platform_device *pdev)
        }
 
        match = of_match_device(rpm_of_match, &pdev->dev);
+       if (!match) {
+               dev_err(&pdev->dev, "failed to match device\n");
+               return -ENODEV;
+       }
+
        for (reg = match->data; reg->name; reg++) {
                vreg = devm_kzalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
                if (!vreg)