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Date: Tue, 14 Oct 2014 14:20:38 +0200 From: Krzysztof Kozlowski <k.kozlowski@...sung.com> To: Linus Walleij <linus.walleij@...aro.org>, Samuel Ortiz <sameo@...ux.intel.com>, Lee Jones <lee.jones@...aro.org>, Sebastian Reichel <sre@...nel.org>, Dmitry Eremin-Solenikov <dbaryshkov@...il.com>, David Woodhouse <dwmw2@...radead.org>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org Cc: Anton Vorontsov <anton@...msg.org>, Guenter Roeck <linux@...ck-us.net>, Pavel Machek <pavel@....cz>, Myungjoo Ham <myungjoo.ham@...sung.com>, Jonghwa Lee <jonghwa3.lee@...sung.com>, Kyungmin Park <kyungmin.park@...sung.com>, Marek Szyprowski <m.szyprowski@...sung.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, Krzysztof Kozlowski <k.kozlowski@...sung.com> Subject: [PATCH 0/8] power_supply: Add API for safe access of get_property-like function attrs Hi, After fixing issue with referencing old power supply after driver unbind in charger manager [1] I noticed that the race condition in such case may still exist. It would be harder to trigger but still possible. The race is between using a reference to power supply (obtained with power_supply_get_by_name()) and removing the driver. This patchset aims to fix the race by introducing wrappers for accessing the power supply function attributes. Patch 1 introduces new API. Other patches replace direct calls in drivers. Rebased on next-20141007. Tested on Trats2 board (max77693 + charger manager). Kindly asking for reviewing/testing the drivers, although the changes are straightforward. Best regards, Krzysztof [1] https://lkml.org/lkml/2014/10/13/272 Krzysztof Kozlowski (8): power_supply: Add API for safe access of power supply function attrs power_supply: sysfs: Use power_supply_*() API for accessing function attrs power: 88pm860x_charger: Use power_supply_*() API for accessing function attrs power: ab8500: Use power_supply_*() API for accessing function attrs mfd: ab8500: Use power_supply_*() API for accessing function attrs power: apm_power: Use power_supply_*() API for accessing function attrs power: bq2415x_charger: Use power_supply_*() API for accessing function attrs power: charger-manager: Use power_supply_*() API for accessing function attrs drivers/mfd/ab8500-sysctrl.c | 7 +++-- drivers/power/88pm860x_charger.c | 13 +++++---- drivers/power/ab8500_btemp.c | 2 +- drivers/power/ab8500_charger.c | 2 +- drivers/power/ab8500_fg.c | 2 +- drivers/power/abx500_chargalg.c | 4 +-- drivers/power/apm_power.c | 4 +-- drivers/power/bq2415x_charger.c | 3 +- drivers/power/charger-manager.c | 37 +++++++++++++------------ drivers/power/power_supply_core.c | 57 ++++++++++++++++++++++++++++++++++++-- drivers/power/power_supply_sysfs.c | 6 ++-- include/linux/power_supply.h | 16 +++++++++++ 12 files changed, 115 insertions(+), 38 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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