linux-kernel - Re: [PATCH 3/5] power: supply: rt5033

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Date:   Thu, 28 Sep 2023 07:23:35 +0200
From:   Marion & Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Jakob Hauser <jahau@...ketmail.com>,
        Sebastian Reichel <sre@...nel.org>
Cc:     Lee Jones <lee@...nel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Stephan Gerhold <stephan@...hold.net>,
        Raymond Hackley <raymondhackley@...tonmail.com>,
        Henrik Grimler <henrik@...mler.se>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 3/5] power: supply: rt5033_charger: fix missing unlock

Ok, but why not already in patch #1?

CJ


Le 27/09/2023 à 22:26, Jakob Hauser a écrit :
> From: Yang Yingliang <yangyingliang@...wei.com>
>
> Fix missing mutex_unlock() in some error path.
>
> Fixes: 12cc585f36b8 ("power: supply: rt5033_charger: Add cable detection and USB OTG supply")
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> Signed-off-by: Jakob Hauser <jahau@...ketmail.com>
> ---
>   drivers/power/supply/rt5033_charger.c | 28 ++++++++++++++++++---------
>   1 file changed, 19 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/power/supply/rt5033_charger.c b/drivers/power/supply/rt5033_charger.c
> index 2c2073b8979d..091ca4a21f29 100644
> --- a/drivers/power/supply/rt5033_charger.c
> +++ b/drivers/power/supply/rt5033_charger.c
> @@ -361,7 +361,8 @@ static int rt5033_charger_set_otg(struct rt5033_charger *charger)
>   			0x37 << RT5033_CHGCTRL2_CV_SHIFT);
>   	if (ret) {
>   		dev_err(charger->dev, "Failed set OTG boost v_out\n");
> -		return -EINVAL;
> +		ret = -EINVAL;
> +		goto out_unlock;
>   	}
>   
>   	/* Set operation mode to OTG */
> @@ -369,7 +370,8 @@ static int rt5033_charger_set_otg(struct rt5033_charger *charger)
>   			RT5033_CHGCTRL1_MODE_MASK, RT5033_BOOST_MODE);
>   	if (ret) {
>   		dev_err(charger->dev, "Failed to update OTG mode.\n");
> -		return -EINVAL;
> +		ret = -EINVAL;
> +		goto out_unlock;
>   	}
>   
>   	/* In case someone switched from charging to OTG directly */
> @@ -378,9 +380,10 @@ static int rt5033_charger_set_otg(struct rt5033_charger *charger)
>   
>   	charger->otg = true;
>   
> +out_unlock:
>   	mutex_unlock(&charger->lock);
>   
> -	return 0;
> +	return ret;
>   }
>   
>   static int rt5033_charger_unset_otg(struct rt5033_charger *charger)
> @@ -420,8 +423,10 @@ static int rt5033_charger_set_charging(struct rt5033_charger *charger)
>   	/* In case someone switched from OTG to charging directly */
>   	if (charger->otg) {
>   		ret = rt5033_charger_unset_otg(charger);
> -		if (ret)
> +		if (ret) {
> +			mutex_unlock(&charger->lock);
>   			return -EINVAL;
> +		}
>   	}
>   
>   	charger->online = true;
> @@ -448,6 +453,7 @@ static int rt5033_charger_set_mivr(struct rt5033_charger *charger)
>   			RT5033_CHGCTRL4_MIVR_MASK, RT5033_CHARGER_MIVR_4600MV);
>   	if (ret) {
>   		dev_err(charger->dev, "Failed to set MIVR level.\n");
> +		mutex_unlock(&charger->lock);
>   		return -EINVAL;
>   	}
>   
> @@ -463,7 +469,7 @@ static int rt5033_charger_set_mivr(struct rt5033_charger *charger)
>   
>   static int rt5033_charger_set_disconnect(struct rt5033_charger *charger)
>   {
> -	int ret;
> +	int ret = 0;
>   
>   	mutex_lock(&charger->lock);
>   
> @@ -475,7 +481,8 @@ static int rt5033_charger_set_disconnect(struct rt5033_charger *charger)
>   				RT5033_CHARGER_MIVR_DISABLE);
>   		if (ret) {
>   			dev_err(charger->dev, "Failed to disable MIVR.\n");
> -			return -EINVAL;
> +			ret = -EINVAL;
> +			goto out_unlock;
>   		}
>   
>   		charger->mivr_enabled = false;
> @@ -483,16 +490,19 @@ static int rt5033_charger_set_disconnect(struct rt5033_charger *charger)
>   
>   	if (charger->otg) {
>   		ret = rt5033_charger_unset_otg(charger);
> -		if (ret)
> -			return -EINVAL;
> +		if (ret) {
> +			ret = -EINVAL;
> +			goto out_unlock;
> +		}
>   	}
>   
>   	if (charger->online)
>   		charger->online = false;
>   
> +out_unlock:
>   	mutex_unlock(&charger->lock);
>   
> -	return 0;
> +	return ret;
>   }
>   
>   static enum power_supply_property rt5033_charger_props[] = {