mtk-pmic-keys being a child device of mt6397, it will always get probed when mt6397_probe() is called. This also happens when we have no device tree node matching mediatek,mt6397-keys. In that case, the mfd core warns us: [ 0.352175] mtk-pmic-keys: Failed to locate of_node [id: -1] 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 -ENODEV Signed-off-by: Mattijs Korpershoek <mkorpershoek@xxxxxxxxxxxx> --- drivers/input/keyboard/mtk-pmic-keys.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c index 62391d6c7da6..12c449eed026 100644 --- a/drivers/input/keyboard/mtk-pmic-keys.c +++ b/drivers/input/keyboard/mtk-pmic-keys.c @@ -247,6 +247,9 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev) const struct of_device_id *of_id = of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev); + if (!of_id) + return -ENODEV; + keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL); if (!keys) return -ENOMEM; -- 2.27.0
