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hwmon: introduce hwmon_sanitize_name()

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More and more drivers will check for bad characters in the hwmon name
and all are using the same code snippet. Consolidate that code by adding
a new hwmon_sanitize_name() function.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220405092452.4033674-2-michael@walle.cc
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Michael Walle
2022-04-05 11:24:51 +02:00
committed by Guenter Roeck
parent 752b927951
commit 1ad6c3b7ef
3 changed files with 72 additions and 0 deletions
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16
Documentation/hwmon/hwmon-kernel-api.rst
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@@ -50,6 +50,10 @@ register/unregister functions::
void devm_hwmon_device_unregister(struct device *dev);
char *hwmon_sanitize_name(const char *name);
char *devm_hwmon_sanitize_name(struct device *dev, const char *name);
hwmon_device_register_with_groups registers a hardware monitoring device.
The first parameter of this function is a pointer to the parent device.
The name parameter is a pointer to the hwmon device name. The registration
@@ -95,6 +99,18 @@ All supported hwmon device registration functions only accept valid device
names. Device names including invalid characters (whitespace, '*', or '-')
will be rejected. The 'name' parameter is mandatory.
If the driver doesn't use a static device name (for example it uses
dev_name()), and therefore cannot make sure the name only contains valid
characters, hwmon_sanitize_name can be used. This convenience function
will duplicate the string and replace any invalid characters with an
underscore. It will allocate memory for the new string and it is the
responsibility of the caller to release the memory when the device is
removed.
devm_hwmon_sanitize_name is the resource managed version of
hwmon_sanitize_name; the memory will be freed automatically on device
removal.
Using devm_hwmon_device_register_with_info()
--------------------------------------------