[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>
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
More information about the linux-arm-kernel
mailing list