pinctrl: npcm7xx: Add missing check for ioremap

[ Upstream commit ad64639417161e90b30dda00486570eb150aeee5 ]

Add check for ioremap() and return the error if it fails in order to
guarantee the success of ioremap().

Fixes: 3b588e43ee5c ("pinctrl: nuvoton: add NPCM7xx pinctrl and GPIO driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20230607095829.1345-1-jiasheng@iscas.ac.cn
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
index ff5bcea172e84c136fb0be48835e2c7bf368e26f..071bdfd570f94c91b82ad89ff63b4999835d253f 100644 (file)
--- a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
@@ -1881,6 +1881,8 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
                }
 
                pctrl->gpio_bank[id].base = ioremap(res.start, resource_size(&res));
+               if (!pctrl->gpio_bank[id].base)
+                       return -EINVAL;
 
                ret = bgpio_init(&pctrl->gpio_bank[id].gc, dev, 4,
                                 pctrl->gpio_bank[id].base + NPCM7XX_GP_N_DIN,