pinctrl: ralink: Check for null return of devm_kcalloc

Because of the possible failure of the allocation, data->domains might
be NULL pointer and will cause the dereference of the NULL pointer
later.
Therefore, it might be better to check it and directly return -ENOMEM
without releasing data manually if fails, because the comment of the
devm_kmalloc() says "Memory allocated with this function is
automatically freed on driver detach.".

Fixes: a86854d0c599b ("treewide: devm_kzalloc() -> devm_kcalloc()")
Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: William Dean <williamsukatube@gmail.com>
Link: https://lore.kernel.org/r/20220710154922.2610876-1-williamsukatube@163.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/ralink/pinctrl-ralink.c b/drivers/pinctrl/ralink/pinctrl-ralink.c
index 63429a2874343a984966925261a4608f00a9f6d0..770862f45b3fe1c53fcf047bc92da02f09a2195f 100644 (file)
--- a/drivers/pinctrl/ralink/pinctrl-ralink.c
+++ b/drivers/pinctrl/ralink/pinctrl-ralink.c
@@ -266,6 +266,8 @@ static int ralink_pinctrl_pins(struct ralink_priv *p)
                                                p->func[i]->pin_count,
                                                sizeof(int),
                                                GFP_KERNEL);
+               if (!p->func[i]->pins)
+                       return -ENOMEM;
                for (j = 0; j < p->func[i]->pin_count; j++)
                        p->func[i]->pins[j] = p->func[i]->pin_first + j;