From cf9af0d5786c008971148f4e06567a98f6a7f9d0 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 27 Sep 2018 13:38:09 +0200 Subject: [PATCH] gpio: Propagate errors from gpiod_set_array_value_complex() Internal helper function gpiod_set_array_value_complex() was changed to return an error value, but not all gpiolib callers were updated to propagate the new error up. Fixes: 3027743f83f867d8 ("gpio: Remove VLA from gpiolib") Signed-off-by: Geert Uytterhoeven Signed-off-by: Linus Walleij --- Documentation/driver-api/gpio/consumer.rst | 16 ++++++------ drivers/gpio/gpiolib.c | 30 ++++++++++++---------- include/linux/gpio/consumer.h | 28 ++++++++++---------- 3 files changed, 39 insertions(+), 35 deletions(-) diff --git a/Documentation/driver-api/gpio/consumer.rst b/Documentation/driver-api/gpio/consumer.rst index ba4973829fae..5e4d8aa68913 100644 --- a/Documentation/driver-api/gpio/consumer.rst +++ b/Documentation/driver-api/gpio/consumer.rst @@ -340,18 +340,18 @@ The following functions get or set the values of an array of GPIOs:: struct gpio_array *array_info, unsigned long *value_bitmap); - void gpiod_set_array_value(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap) + int gpiod_set_array_value(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap) int gpiod_set_raw_array_value(unsigned int array_size, struct gpio_desc **desc_array, struct gpio_array *array_info, unsigned long *value_bitmap) - void gpiod_set_array_value_cansleep(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap) + int gpiod_set_array_value_cansleep(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap) int gpiod_set_raw_array_value_cansleep(unsigned int array_size, struct gpio_desc **desc_array, struct gpio_array *array_info, diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index a293f14ba75c..51dd9d601cac 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3346,15 +3346,16 @@ EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value); * This function should be called from contexts where we cannot sleep, and will * complain if the GPIO chip functions potentially sleep. */ -void gpiod_set_array_value(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap) +int gpiod_set_array_value(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap) { if (!desc_array) - return; - gpiod_set_array_value_complex(false, false, array_size, desc_array, - array_info, value_bitmap); + return -EINVAL; + return gpiod_set_array_value_complex(false, false, array_size, + desc_array, array_info, + value_bitmap); } EXPORT_SYMBOL_GPL(gpiod_set_array_value); @@ -3763,16 +3764,17 @@ void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) * * This function is to be called from contexts that can sleep. */ -void gpiod_set_array_value_cansleep(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap) +int gpiod_set_array_value_cansleep(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap) { might_sleep_if(extra_checks); if (!desc_array) - return; - gpiod_set_array_value_complex(false, true, array_size, desc_array, - array_info, value_bitmap); + return -EINVAL; + return gpiod_set_array_value_complex(false, true, array_size, + desc_array, array_info, + value_bitmap); } EXPORT_SYMBOL_GPL(gpiod_set_array_value_cansleep); diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index d7fbe30ece84..136aeca37740 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -117,10 +117,10 @@ int gpiod_get_array_value(unsigned int array_size, struct gpio_array *array_info, unsigned long *value_bitmap); void gpiod_set_value(struct gpio_desc *desc, int value); -void gpiod_set_array_value(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap); +int gpiod_set_array_value(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap); int gpiod_get_raw_value(const struct gpio_desc *desc); int gpiod_get_raw_array_value(unsigned int array_size, struct gpio_desc **desc_array, @@ -139,10 +139,10 @@ int gpiod_get_array_value_cansleep(unsigned int array_size, struct gpio_array *array_info, unsigned long *value_bitmap); void gpiod_set_value_cansleep(struct gpio_desc *desc, int value); -void gpiod_set_array_value_cansleep(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap); +int gpiod_set_array_value_cansleep(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap); int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc); int gpiod_get_raw_array_value_cansleep(unsigned int array_size, struct gpio_desc **desc_array, @@ -361,13 +361,14 @@ static inline void gpiod_set_value(struct gpio_desc *desc, int value) /* GPIO can never have been requested */ WARN_ON(1); } -static inline void gpiod_set_array_value(unsigned int array_size, - struct gpio_desc **desc_array, - struct gpio_array *array_info, - unsigned long *value_bitmap) +static inline int gpiod_set_array_value(unsigned int array_size, + struct gpio_desc **desc_array, + struct gpio_array *array_info, + unsigned long *value_bitmap) { /* GPIO can never have been requested */ WARN_ON(1); + return 0; } static inline int gpiod_get_raw_value(const struct gpio_desc *desc) { @@ -419,13 +420,14 @@ static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value) /* GPIO can never have been requested */ WARN_ON(1); } -static inline void gpiod_set_array_value_cansleep(unsigned int array_size, +static inline int gpiod_set_array_value_cansleep(unsigned int array_size, struct gpio_desc **desc_array, struct gpio_array *array_info, unsigned long *value_bitmap) { /* GPIO can never have been requested */ WARN_ON(1); + return 0; } static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc) { -- 2.30.2