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PM: runtime: add devm_pm_runtime_enable helper

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[ Upstream commit b3636a3a2c51715736d3ec45f635ed03191962ce ]

A typical code pattern for pm_runtime_enable() call is to call it in the
_probe function and to call pm_runtime_disable() both from _probe error
path and from _remove function. For some drivers the whole remove
function would consist of the call to pm_remove_disable().

Add helper function to replace this bolierplate piece of code. Calling
devm_pm_runtime_enable() removes the need for calling
pm_runtime_disable() both in the probe()'s error path and in the
remove() function.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210731195034.979084-2-dmitry.baryshkov@linaro.org
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Stable-dep-of: 3d07a411b4fa ("drm/msm/dsi: Use pm_runtime_resume_and_get to prevent refcnt leaks")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Baryshkov 2024-01-30 18:16:28 +05:30 committed by Ksawlii
parent ac714395b7
commit 7f77989580
2 changed files with 21 additions and 0 deletions
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17
drivers/base/power/runtime.c
View file

@ -1479,6 +1479,23 @@ void pm_runtime_enable(struct device *dev)
}
EXPORT_SYMBOL_GPL(pm_runtime_enable);
static void pm_runtime_disable_action(void *data)
{
pm_runtime_disable(data);
}
/**
* devm_pm_runtime_enable - devres-enabled version of pm_runtime_enable.
* @dev: Device to handle.
*/
int devm_pm_runtime_enable(struct device *dev)
{
pm_runtime_enable(dev);
return devm_add_action_or_reset(dev, pm_runtime_disable_action, dev);
}
EXPORT_SYMBOL_GPL(devm_pm_runtime_enable);
/**
* pm_runtime_forbid - Block runtime PM of a device.
* @dev: Device to handle.

4
include/linux/pm_runtime.h
View file

@ -60,6 +60,8 @@ extern void pm_runtime_new_link(struct device *dev);
extern void pm_runtime_drop_link(struct device_link *link);
extern void pm_runtime_release_supplier(struct device_link *link);
extern int devm_pm_runtime_enable(struct device *dev);
/**
* pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
* @dev: Target device.
@ -254,6 +256,8 @@ static inline void __pm_runtime_disable(struct device *dev, bool c) {}
static inline void pm_runtime_allow(struct device *dev) {}
static inline void pm_runtime_forbid(struct device *dev) {}
static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }
static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
static inline void pm_runtime_get_noresume(struct device *dev) {}
static inline void pm_runtime_put_noidle(struct device *dev) {}