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gpiolib: devres: Finish the conversion to use devm_add_action()

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With a recently added helper we can complete the conversion of
the GPIOLIB code to use devm_add_action() in all suitable cases.
So do this.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250220162238.2738038-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Andy Shevchenko 2025-02-20 18:20:28 +02:00 • committed by Bartosz Golaszewski
parent 063a2b45d6
commit d1d52c6622
1 changed files with 25 additions and 65 deletions
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90
drivers/gpio/gpiolib-devres.c
View file

@ -6,7 +6,7 @@
* Copyright (c) 2011 John Crispin <john@phrozen.org>
*/
#include <linux/device.h>
#include <linux/device/devres.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/gfp.h>
@ -19,32 +19,14 @@
struct fwnode_handle;
struct lock_class_key;
static void devm_gpiod_release(struct device *dev, void *res)
static void devm_gpiod_release(void *desc)
{
struct gpio_desc **desc = res;
gpiod_put(*desc);
gpiod_put(desc);
}
static int devm_gpiod_match(struct device *dev, void *res, void *data)
static void devm_gpiod_release_array(void *descs)
{
struct gpio_desc **this = res, **gpio = data;
return *this == *gpio;
}
static void devm_gpiod_release_array(struct device *dev, void *res)
{
struct gpio_descs **descs = res;
gpiod_put_array(*descs);
}
static int devm_gpiod_match_array(struct device *dev, void *res, void *data)
{
struct gpio_descs **this = res, **gpios = data;
return *this == *gpios;
gpiod_put_array(descs);
}
/**
@ -114,8 +96,8 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
unsigned int idx,
enum gpiod_flags flags)
{
struct gpio_desc **dr;
struct gpio_desc *desc;
int ret;
desc = gpiod_get_index(dev, con_id, idx, flags);
if (IS_ERR(desc))
@ -126,23 +108,16 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
* already under resource management by this device.
*/
if (flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE) {
struct devres *dres;
bool dres;
dres = devres_find(dev, devm_gpiod_release,
devm_gpiod_match, &desc);
dres = devm_is_action_added(dev, devm_gpiod_release, desc);
if (dres)
return desc;
}
dr = devres_alloc(devm_gpiod_release, sizeof(struct gpio_desc *),
GFP_KERNEL);
if (!dr) {
gpiod_put(desc);
return ERR_PTR(-ENOMEM);
}
*dr = desc;
devres_add(dev, dr);
ret = devm_add_action_or_reset(dev, devm_gpiod_release, desc);
if (ret)
return ERR_PTR(ret);
return desc;
}
@ -171,22 +146,16 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev,
enum gpiod_flags flags,
const char *label)
{
struct gpio_desc **dr;
struct gpio_desc *desc;
dr = devres_alloc(devm_gpiod_release, sizeof(struct gpio_desc *),
GFP_KERNEL);
if (!dr)
return ERR_PTR(-ENOMEM);
int ret;
desc = gpiod_find_and_request(dev, fwnode, con_id, index, flags, label, false);
if (IS_ERR(desc)) {
devres_free(dr);
if (IS_ERR(desc))
return desc;
}
*dr = desc;
devres_add(dev, dr);
ret = devm_add_action_or_reset(dev, devm_gpiod_release, desc);
if (ret)
return ERR_PTR(ret);
return desc;
}
@ -244,22 +213,16 @@ struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev,
const char *con_id,
enum gpiod_flags flags)
{
struct gpio_descs **dr;
struct gpio_descs *descs;
dr = devres_alloc(devm_gpiod_release_array,
sizeof(struct gpio_descs *), GFP_KERNEL);
if (!dr)
return ERR_PTR(-ENOMEM);
int ret;
descs = gpiod_get_array(dev, con_id, flags);
if (IS_ERR(descs)) {
devres_free(dr);
if (IS_ERR(descs))
return descs;
}
*dr = descs;
devres_add(dev, dr);
ret = devm_add_action_or_reset(dev, devm_gpiod_release_array, descs);
if (ret)
return ERR_PTR(ret);
return descs;
}
@ -307,8 +270,7 @@ EXPORT_SYMBOL_GPL(devm_gpiod_get_array_optional);
*/
void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
{
WARN_ON(devres_release(dev, devm_gpiod_release, devm_gpiod_match,
&desc));
devm_release_action(dev, devm_gpiod_release, desc);
}
EXPORT_SYMBOL_GPL(devm_gpiod_put);
@ -321,20 +283,19 @@ EXPORT_SYMBOL_GPL(devm_gpiod_put);
* you want to hand over lifecycle management of a descriptor to another
* mechanism.
*/
void devm_gpiod_unhinge(struct device *dev, struct gpio_desc *desc)
{
int ret;
if (IS_ERR_OR_NULL(desc))
return;
ret = devres_destroy(dev, devm_gpiod_release,
devm_gpiod_match, &desc);
/*
* If the GPIO descriptor is requested as nonexclusive, we
* may call this function several times on the same descriptor
* so it is OK if devres_destroy() returns -ENOENT.
*/
ret = devm_remove_action_nowarn(dev, devm_gpiod_release, desc);
if (ret == -ENOENT)
return;
/* Anything else we should warn about */
@ -353,8 +314,7 @@ EXPORT_SYMBOL_GPL(devm_gpiod_unhinge);
*/
void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs)
{
WARN_ON(devres_release(dev, devm_gpiod_release_array,
devm_gpiod_match_array, &descs));
devm_remove_action(dev, devm_gpiod_release_array, descs);
}
EXPORT_SYMBOL_GPL(devm_gpiod_put_array);