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Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 2 +- include/linux/gpio/consumer.h | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 5b0b4fc975435290a03410f1e33fea28dd6fea08..6b4f94c3887fcbe1d90a0ff5800100e9ae7ad5b9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -286,7 +286,7 @@ EXPORT_SYMBOL_GPL(gpiod_to_gpio_device); * Returns: * True if the descriptors refer to the same physical pin. False otherwise. */ -bool gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other) +bool gpiod_is_equal(const struct gpio_desc *desc, const struct gpio_desc *other) { return desc == other; } diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index f0b1982da0cc78b85af8bd61474cc2fe0dd73c98..00df68c514051434e6fa67dc2307c6a8ce4ce3df 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -181,7 +181,8 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, enum gpiod_flags flags, const char *label); -bool gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other); +bool gpiod_is_equal(const struct gpio_desc *desc, + const struct gpio_desc *other); #else /* CONFIG_GPIOLIB */ @@ -551,7 +552,7 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, } static inline bool -gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other) +gpiod_is_equal(const struct gpio_desc *desc, const struct gpio_desc *other) { WARN_ON(desc || other); 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h=from:subject:message-id; bh=OFq2jjk5hEbzcqRvtGSawof0gj1zKwJLAuw+vgBeDAg=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBoVVre2l2jVIykSM6DjZOZSIVHOOXzz57CRVo1p OuZbSpX0qCJAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCaFVa3gAKCRARpy6gFHHX ckyhEACozFTJsI5pvYRzEr7BZpy26bXIfNNiqBUNTJopoLAfUluRbpKTwNhek4q3QEJOLx7MbjB D8m1wjOzRxqH6liH28UCFAR60CDMwW4Be5yVXUJ8BvZkwR2w5+4MzSO1ciObR181Ju/N2JuohY3 UtXqyXwRCNkyF1ONfR9Zk1AY4NfzY/xz7v1luYTFjXqwcTMe0u9pkliqbt/OGWY6Pk2PHtVn3RQ Bg1Yr9x2YQXjqvLaCPdbqBlZgawMg2+qYw5Yv85xk32+fXmgzKM6DhQX7y1olF96jm2hk69SIG8 FLOt9wEZBDHKAUK+vK+QtWSpw9a8wPrD5Yw/fVCYQYzCDtjfOSpj1cBzFmdUM+GnwzxxWO6Va5T BtkWnGOZlen92R0gAgW1mnEmpUc/t/8cTlnNRi3bEx/gMph7InTeclCQp9YWQQllvfZrdazJkZw Rz6uTvbl1Hb8TGREyW2eh65l2JqGm8BDKOCBSGhZg4BT79BUB0l+Oe0VLdKmSldyg35wZ+h0Cx9 MT/UPR5dFadgIGt2XNlotgcACLInMOj2LIs6IvqP1qhEX1tVyipHAPbTkEz1hCXi9E7xwgh880f tLJajg8sVFJJCCtuzKOR3B2L9rovuuuXBfn+Dyokcir69VxL7yubGf+M9m92HqNn/V/zO1EYj+A JA25WnUfC71vjFw== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski It makes no sense for a GPIO descriptor comparator to return true when the arguments passed to it are NULL or IS_ERR(). Let's validate both and return false unless both are valid GPIO descriptors. Suggested-by: Andy Shevchenko Link: https://lore.kernel.org/all/Z_aFBfjb17JxOwyk@black.fi.intel.com/ Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 6b4f94c3887fcbe1d90a0ff5800100e9ae7ad5b9..7b2174b10219964a3f106562e1685a6d900d56c8 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -278,20 +278,6 @@ struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc) } EXPORT_SYMBOL_GPL(gpiod_to_gpio_device); -/** - * gpiod_is_equal() - Check if two GPIO descriptors refer to the same pin. - * @desc: Descriptor to compare. - * @other: The second descriptor to compare against. - * - * Returns: - * True if the descriptors refer to the same physical pin. False otherwise. - */ -bool gpiod_is_equal(const struct gpio_desc *desc, const struct gpio_desc *other) -{ - return desc == other; -} -EXPORT_SYMBOL_GPL(gpiod_is_equal); - /** * gpio_device_get_base() - Get the base GPIO number allocated by this device * @gdev: GPIO device @@ -400,6 +386,21 @@ static int validate_desc(const struct gpio_desc *desc, const char *func) return; \ } while (0) +/** + * gpiod_is_equal() - Check if two GPIO descriptors refer to the same pin. + * @desc: Descriptor to compare. + * @other: The second descriptor to compare against. + * + * Returns: + * True if the descriptors refer to the same physical pin. False otherwise. + */ +bool gpiod_is_equal(const struct gpio_desc *desc, const struct gpio_desc *other) +{ + return validate_desc(desc, __func__) > 0 && + !IS_ERR_OR_NULL(other) && desc == other; +} +EXPORT_SYMBOL_GPL(gpiod_is_equal); + static int gpiochip_get_direction(struct gpio_chip *gc, unsigned int offset) { int ret;