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driver core: add devm_device_add_group() and friends

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Many drivers create additional driver-specific device attributes when
binding to the device, and providing managed version of
device_create_group() will simplify unbinding and error handling in probe
path for such drivers.

Without managed version driver writers either have to mix manual and
managed resources, which is prone to errors, or open-code this function by
providing a wrapper to device_add_group() and use it with devm_add_action()
or devm_add_action_or_reset().

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Torokhov 2017-07-19 17:24:33 -07:00 • committed by Greg Kroah-Hartman
parent e323b2dddc
commit 57b8ff070f
2 changed files with 139 additions and 0 deletions
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9
include/linux/device.h
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@ -1221,6 +1221,15 @@ static inline void device_remove_group(struct device *dev,
return device_remove_groups(dev, groups);
}
extern int __must_check devm_device_add_groups(struct device *dev,
const struct attribute_group **groups);
extern void devm_device_remove_groups(struct device *dev,
const struct attribute_group **groups);
extern int __must_check devm_device_add_group(struct device *dev,
const struct attribute_group *grp);
extern void devm_device_remove_group(struct device *dev,
const struct attribute_group *grp);
/*
* Platform "fixup" functions - allow the platform to have their say
* about devices and actions that the general device layer doesn't