This is a note to let you know that I've just added the patch titled
regulator: change devm_regulator_get_enable_optional() stub to return Ok
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regulator-change-devm_regulator_get_enable_optional-.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f101269913cef201cae0eed20d35b182073c5ce6
Author: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Date: Tue Apr 23 14:38:28 2024 +0300
regulator: change devm_regulator_get_enable_optional() stub to return Ok
[ Upstream commit ff33132605c1a0acea59e4c523cb7c6fabe856b2 ]
The devm_regulator_get_enable_optional() should be a 'call and forget'
API, meaning, when it is used to enable the regulators, the API does not
provide a handle to do any further control of the regulators. It gives
no real benefit to return an error from the stub if CONFIG_REGULATOR is
not set.
On the contrary, returning an error is causing problems to drivers when
hardware is such it works out just fine with no regulator control.
Returning an error forces drivers to specifically handle the case where
CONFIG_REGULATOR is not set, making the mere existence of the stub
questionalble.
Change the stub implementation for the
devm_regulator_get_enable_optional() to return Ok so drivers do not
separately handle the case where the CONFIG_REGULATOR is not set.
Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Fixes: da279e6965b3 ("regulator: Add devm helpers for get and enable")
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/ZiedtOE00Zozd3XO@fedora
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index e3e58d5a84e2a..2c526c8d10cc4 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -371,7 +371,7 @@ static inline int devm_regulator_get_enable(struct device *dev, const char *id)
static inline int devm_regulator_get_enable_optional(struct device *dev,
const char *id)
{
- return -ENODEV;
+ return 0;
}
static inline struct regulator *__must_check
