From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Thu, 12 Mar 2015 07:44:13 +0000 (+0100)
Subject: power_supply: Increment power supply use counter when obtaining references
X-Git-Tag: omap-for-v4.1/fixes-rc1~174^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=03e81acce5568c7105dc5bef6984c8b0edfe8d45;p=pandora-kernel.git

power_supply: Increment power supply use counter when obtaining references

Increment the power_supply.use_cnt usage counter on:
 - power_supply_get_by_phandle()
 - power_supply_get_by_name()
and decrement it on power_supply_put() call.

This helps tracking of valid usage of power supply instance by
consumers. The usage counter itself also allows safe calling of
power_supply_get_property-like functions even when driver unregisters
this power supply.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
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