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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2019-12-24 15:06:59 +0300
committerBartosz Golaszewski <bgolaszewski@baylibre.com>2020-01-07 14:03:28 +0300
commit06863620edfeadbe9e0ea5eb01dd94ce07f37549 (patch)
treef480b288a7b532bc0ddc30a49bc094f232f0abc9 /include/linux/gpio
parentd90f36851d6595136b461773846b76e0c45e3e0c (diff)
downloadlinux-06863620edfeadbe9e0ea5eb01dd94ce07f37549.tar.xz
gpiolib: convert the type of hwnum to unsigned int in gpiochip_get_desc()
gpiochip_get_desc() takes a u16 hwnum, but it turns out most users don't respect that and usually pass an unsigned int. Since implicit casting to a smaller type is dangerous - let's change the type of hwnum to unsigned int in gpiochip_get_desc() and in gpiochip_request_own_desc() where the size of hwnum is not respected either and who's a user of the former. This is safe as we then check the hwnum against the number of lines before proceeding in gpiochip_get_desc(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio')
-rw-r--r--include/linux/gpio/driver.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index e2480ef94c55..4f032de10bae 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -715,7 +715,8 @@ gpiochip_remove_pin_ranges(struct gpio_chip *chip)
#endif /* CONFIG_PINCTRL */
-struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
+struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip,
+ unsigned int hwnum,
const char *label,
enum gpio_lookup_flags lflags,
enum gpiod_flags dflags);