From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Reichel <sre@kernel.org>
Subject: Re: [PATCH v2 1/2] power_supply: Add no_thermal property to prevent
 recursive get_temp calls
Date: Mon, 27 Oct 2014 19:29:58 +0100
Message-ID: <20141027182957.GD10897@earth.universe>
References: <1412696857-14803-1-git-send-email-k.kozlowski@samsung.com>
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To: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>, David Woodhouse <dwmw2@infradead.org>, Myungjoo Ham <myungjoo.ham@samsung.com>, Anton Vorontsov <anton@enomsg.org>, Jonghwa Lee <jonghwa3.lee@samsung.com>, Chanwoo Choi <cw00.choi@samsung.com>, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Kyungmin Park <kyungmin.park@samsung.com>, Marek Szyprowski <m.szyprowski@samsung.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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Hi,

On Tue, Oct 07, 2014 at 05:47:36PM +0200, Krzysztof Kozlowski wrote:
> Add a 'no_thermal' property to the power supply class. If true then
> thermal zone won't be created for this power supply in
> power_supply_register().
>=20
> Power supply drivers may want to set it if they support
> POWER_SUPPLY_PROP_TEMP and they are forwarding this get property call to
> other thermal zone.
>=20
> If they won't set it lockdep may report false positive deadlock for
> thermal zone's mutex because of nested calls to thermal_zone_get_temp().
> First is the call to thermal_zone_get_temp() of the driver's thermal
> zone. Thermal core gets POWER_SUPPLY_PROP_TEMP property from this
> driver. The driver then calls other thermal zone thermal_zone_get_temp()
> and returns result.
>=20
> Example of such driver is charger manager.
>=20
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

pulled into next, I will include it in 3.18-rc pull request.

-- Sebastian

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