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Date: Thu, 27 Sep 2018 13:38:09 +0200
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Linus Walleij <linus.walleij@...aro.org>,
Laura Abbott <labbott@...hat.com>
Cc: Jonathan Corbet <corbet@....net>, linux-gpio@...r.kernel.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v2 2/3] 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 <geert+renesas@...der.be>
---
v2:
- Rebase on top of gpio array rework.
---
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 ba4973829faef238..5e4d8aa68913529c 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 a53d17745d210480..843a8075ac437d57 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3306,15 +3306,16 @@ 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);
@@ -3723,16 +3724,17 @@ 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 d7fbe30ece849cd7..136aeca37740decf 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)
{
--
2.17.1
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