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: 3027743f ("gpio: Remove VLA from gpiolib")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/driver-api/gpio/consumer.rst

@@ -340,7 +340,7 @@ 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,
+	int gpiod_set_array_value(unsigned int array_size,
 				  struct gpio_desc **desc_array,
 				  struct gpio_array *array_info,
 				  unsigned long *value_bitmap)
@@ -348,7 +348,7 @@ The following functions get or set the values of an array of GPIOs::
 				      struct gpio_desc **desc_array,
 				      struct gpio_array *array_info,
 				      unsigned long *value_bitmap)
-	void gpiod_set_array_value_cansleep(unsigned int array_size,
+	int gpiod_set_array_value_cansleep(unsigned int array_size,
 					   struct gpio_desc **desc_array,
 					   struct gpio_array *array_info,
 					   unsigned long *value_bitmap)

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,
+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,
+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);
 

include/linux/gpio/consumer.h

@@ -117,7 +117,7 @@ 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,
+int gpiod_set_array_value(unsigned int array_size,
 			  struct gpio_desc **desc_array,
 			  struct gpio_array *array_info,
 			  unsigned long *value_bitmap);
@@ -139,7 +139,7 @@ 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,
+int gpiod_set_array_value_cansleep(unsigned int array_size,
 				   struct gpio_desc **desc_array,
 				   struct gpio_array *array_info,
 				   unsigned long *value_bitmap);
@@ -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,
+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)
 {