From: Pavel Machek <pavel@ucw.cz>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Sebastian Reichel <sre@kernel.org>,
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>, Jiri Kosina <jkosina@suse.cz>,
David Herrmann <dh.herrmann@googlemail.com>,
Cezary Jackiewicz <cezary.jackiewicz@gmail.com>,
Darren Hart <dvhart@infradead.org>,
Support Opensource <support.opensource@diasemi.com>,
Milo Kim <milo.kim@ti.com>,
Julian Andres Klode <jak@jak-linux.org>,
Marc Dietrich <marvin24@gmx.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-acpi@vger.kernel.org, linux-input@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
patches@opensource.wolfsonmicro.com, ac100@lists.launchpad.net,
linux-tegra@vger.kernel.org, devel@driverdev.osuosl.org,
Linus Walleij <linus.walleij@linaro.org>,
Samuel
Subject: Re: [PATCH v3 03/20] power_supply: Add API for safe access of power supply function attrs
Date: Wed, 4 Feb 2015 14:44:56 +0100 [thread overview]
Message-ID: <20150204134456.GA8312@amd> (raw)
In-Reply-To: <1422629278-12202-4-git-send-email-k.kozlowski@samsung.com>
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@samsung.com>
> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Reviewed-by: Sebastian Reichel <sre@kernel.org>
For 1-3: Acked-by: Pavel Machek <pavel@ucw.cz>
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2015-02-04 13:45 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-30 14:47 [PATCH v3 00/20] power_supply: Allow safe usage of power supply Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 01/20] power_supply: Add driver private data Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 03/20] power_supply: Add API for safe access of power supply function attrs Krzysztof Kozlowski
2015-02-04 13:44 ` Pavel Machek [this message]
2015-01-30 14:47 ` [PATCH v3 04/20] power_supply: sysfs: Use power_supply_*() API for accessing " Krzysztof Kozlowski
2015-02-09 19:02 ` Stefan Wahren
[not found] ` <70066540.345820.1423508541546.JavaMail.open-xchange-h4m1HHXQYNHZ78VGacPtK8gmgJlYmuWJ@public.gmane.org>
2015-02-10 7:39 ` Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 05/20] power_supply: 88pm860x_charger: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 06/20] power_supply: ab8500: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 07/20] mfd: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 08/20] power_supply: apm_power: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 09/20] power_supply: bq2415x_charger: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 10/20] power_supply: charger-manager: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 11/20] power_supply: Change ownership from driver to core Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 12/20] power_supply: Add power_supply_put for decrementing device reference counter Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 13/20] power_supply: Increment power supply use counter when obtaining references Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 14/20] power_supply: charger-manager: Decrement the power supply's device reference counter Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 15/20] x86/olpc/xo1/sci: Use newly added power_supply_put API Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 16/20] x86/olpc/xo15/sci: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 18/20] power_supply: bq2415x_charger: Decrement the power supply's device reference counter Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 19/20] mfd: ab8500: " Krzysztof Kozlowski
2015-01-30 14:47 ` [PATCH v3 20/20] arm: mach-pxa: " Krzysztof Kozlowski
2015-02-06 13:49 ` Pavel Machek
2015-02-06 14:43 ` Krzysztof Kozlowski
2015-02-06 14:59 ` Pavel Machek
2015-02-09 10:07 ` Krzysztof Kozlowski
2015-02-11 22:12 ` Pavel Machek
2015-02-07 12:54 ` Robert Jarzmik
[not found] ` <1422629278-12202-1-git-send-email-k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-01-30 14:47 ` [PATCH v3 02/20] power_supply: Move run-time configuration to separate structure Krzysztof Kozlowski
2015-02-07 2:19 ` Darren Hart
2015-01-30 14:47 ` [PATCH v3 17/20] power_supply: 88pm860x_charger: Decrement the power supply's device reference counter Krzysztof Kozlowski
2015-02-02 8:58 ` [PATCH v3 00/20] power_supply: Allow safe usage of power supply Marc Dietrich
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