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pinctrl: mediatek: Fix some off by one bugs

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These comparisons should be >= instead of > to prevent accessing one
element beyond the end of the hw->soc->pins[] array.

Fixes: 3de7deefce ("pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()")
Fixes: 184d8e13f9 ("pinctrl: mediatek: Add support for pin configuration dump via debugfs.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200218055247.74s2xa7veqx2do34@kili.mountain
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Dan Carpenter 2020-02-18 08:52:47 +03:00 committed by Linus Walleij
parent d6d43a9217
commit 3385ab72d9
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/pinctrl/mediatek/pinctrl-paris.c
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@ -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);