From 3385ab72d995fc0b876818a36203bf2429445686 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 18 Feb 2020 08:52:47 +0300 Subject: pinctrl: mediatek: Fix some off by one bugs These comparisons should be >= instead of > to prevent accessing one element beyond the end of the hw->soc->pins[] array. Fixes: 3de7deefce69 ("pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()") Fixes: 184d8e13f9b1 ("pinctrl: mediatek: Add support for pin configuration dump via debugfs.") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/20200218055247.74s2xa7veqx2do34@kili.mountain Reviewed-by: Matthias Brugger Signed-off-by: Linus Walleij --- drivers/pinctrl/mediatek/pinctrl-paris.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers/pinctrl') diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 2e2ee4dba13c..3ee8086f5e55 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -544,7 +544,7 @@ static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int const struct mtk_pin_desc *desc; int value, err; - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; @@ -583,7 +583,7 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1; const struct mtk_pin_desc *desc; - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; @@ -766,7 +766,7 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) const struct mtk_pin_desc *desc; int value, err; - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; @@ -787,7 +787,7 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio) const struct mtk_pin_desc *desc; int value, err; - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; @@ -804,7 +804,7 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value) struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; @@ -816,7 +816,7 @@ static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; return pinctrl_gpio_direction_input(chip->base + gpio); @@ -827,7 +827,7 @@ static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio, { struct mtk_pinctrl *hw = gpiochip_get_data(chip); - if (gpio > hw->soc->npins) + if (gpio >= hw->soc->npins) return -EINVAL; mtk_gpio_set(chip, gpio, value); -- cgit v1.2.3