linux-kernel - Re: [PATCH 2/5] power: supply: bq27xxx: Register power supply with devm

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Date:   Mon, 1 May 2017 12:55:37 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Paul Kocialkowski <contact@...lk.fr>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pali Rohár <pali.rohar@...il.com>,
        "Andrew F . Davis" <afd@...com>, Chris Lapa <chris@...a.com.au>,
        Matt Ranostay <mranostay@...il.com>
Subject: Re: [PATCH 2/5] power: supply: bq27xxx: Register power supply with
 devm

Hi,

On Sun, Apr 30, 2017 at 08:27:24PM +0200, Paul Kocialkowski wrote:
> This uses the managed devices resources version of the
> power_supply_register_no_ws function to register the power supply.
> 
> Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
> ---
>  drivers/power/supply/bq27xxx_battery.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
> index 6ef95442a918..be476e0bc85d 100644
> --- a/drivers/power/supply/bq27xxx_battery.c
> +++ b/drivers/power/supply/bq27xxx_battery.c
> @@ -1371,7 +1371,7 @@ int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
>  	psy_desc->get_property = bq27xxx_battery_get_property;
>  	psy_desc->external_power_changed = bq27xxx_external_power_changed;
>  
> -	di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
> +	di->bat = devm_power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
>  	if (IS_ERR(di->bat)) {
>  		dev_err(di->dev, "failed to register battery\n");
>  		return PTR_ERR(di->bat);

That does not make sense if bq27xxx_battery_teardown() still calls
power_supply_unregister().

-- Sebastian

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