[PATCH v3 03/20] power_supply: Add API for safe access of power supply function attrs

Pavel Machek pavel at ucw.cz
Wed Feb 4 05:44:56 PST 2015

On Fri 2015-01-30 15:47:41, Krzysztof Kozlowski wrote:
> Add simple wrappers for accessing power supply's function attributes:
>  - get_property -> power_supply_get_property
>  - set_property -> power_supply_set_property
>  - property_is_writeable -> power_supply_property_is_writeable
>  - external_power_changed -> power_supply_external_power_changed
> This API along with atomic usage counter adds a safe way of accessing a
> power supply from another driver. If power supply is unregistered after
> obtaining reference to it by some driver, then the API wrappers won't be
> executed in invalid (freed) context.
> Next patch changing the ownership of power supply class is still needed
> to fully fix race conditions in accessing freed power supply.
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
> Reviewed-by: Sebastian Reichel <sre at kernel.org>

For 1-3: Acked-by: Pavel Machek <pavel at ucw.cz>

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