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hwmon: Remove devm_hwmon_device_unregister() API function

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devm_hwmon_device_unregister() has no in-tree user, and its implementation
is wrong since it does not pass the to-be-removed hardware monitoring
device as parameter. I do not envision a valid use for it; drivers needing
it should not have called devm_hwmon_device_register_with_info() in the
first place. Remove it.

Reported-by: Matthew Sanders <m@ttsande.rs>
Closes: https://lore.kernel.org/linux-hwmon/488b3bdf870ea76c4b943dbe5fd15ac8113019dc.camel@kernel.org/
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-09-13 07:11:42 -07:00
parent 3017d28d6c
commit 2cb4acf214
3 changed files with 0 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/hwmon/hwmon-kernel-api.rst
View File

@ -38,8 +38,6 @@ register/unregister functions::
void hwmon_device_unregister(struct device *dev); void hwmon_device_unregister(struct device *dev);
void devm_hwmon_device_unregister(struct device *dev);
char *hwmon_sanitize_name(const char *name); char *hwmon_sanitize_name(const char *name);
char *devm_hwmon_sanitize_name(struct device *dev, const char *name); char *devm_hwmon_sanitize_name(struct device *dev, const char *name);
@ -64,11 +62,6 @@ monitoring device structure. This function must be called from the driver
remove function if the hardware monitoring device was registered with remove function if the hardware monitoring device was registered with
hwmon_device_register_with_info. hwmon_device_register_with_info.
devm_hwmon_device_unregister does not normally have to be called. It is only
needed for error handling, and only needed if the driver probe fails after
the call to devm_hwmon_device_register_with_info and if the automatic (device
managed) removal would be too late.
All supported hwmon device registration functions only accept valid device All supported hwmon device registration functions only accept valid device
names. Device names including invalid characters (whitespace, '*', or '-') names. Device names including invalid characters (whitespace, '*', or '-')
will be rejected. The 'name' parameter is mandatory. will be rejected. The 'name' parameter is mandatory.

18
drivers/hwmon/hwmon.c
View File

@ -1188,24 +1188,6 @@ error:
} }
EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info);
static int devm_hwmon_match(struct device *dev, void *res, void *data)
{
struct device **hwdev = res;
return *hwdev == data;
}
/**
* devm_hwmon_device_unregister - removes a previously registered hwmon device
*
* @dev: the parent device of the device to unregister
*/
void devm_hwmon_device_unregister(struct device *dev)
{
WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev));
}
EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister);
static char *__hwmon_sanitize_name(struct device *dev, const char *old_name) static char *__hwmon_sanitize_name(struct device *dev, const char *old_name)
{ {
char *name, *p; char *name, *p;

1
include/linux/hwmon.h
View File

@ -481,7 +481,6 @@ devm_hwmon_device_register_with_info(struct device *dev,
const struct attribute_group **extra_groups); const struct attribute_group **extra_groups);
void hwmon_device_unregister(struct device *dev); void hwmon_device_unregister(struct device *dev);
void devm_hwmon_device_unregister(struct device *dev);
int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel); u32 attr, int channel);