linux-kernel - Re: [PATCH] phy: core: fix wrong err handle for phy_power

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Date:	Wed, 3 Feb 2016 11:55:09 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Shawn Lin <shawn.lin@...k-chips.com>
CC:	<linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>,
	Axel Lin <axel.lin@...ics.com>
Subject: Re: [PATCH] phy: core: fix wrong err handle for phy_power_on

Hi,

On Thursday 28 January 2016 01:44 PM, Shawn Lin wrote:
> If phy_pm_runtime_get_sync failed but we already
> enable regulator, current code return directly without
> doing regulator_disable. This patch fix this problem
> and cleanup err handle of phy_power_on to be more readable.
> 
> Fixes: 3be88125d85d ("phy: core: Support regulator ...")
> Cc: Roger Quadros <rogerq@...com>
> Cc: Axel Lin <axel.lin@...ics.com>
> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>

Thank you for fixing this. Merged it.

Thanks
Kishon

> ---
> 
>  drivers/phy/phy-core.c | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 8c7f27d..e7e574d 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -275,20 +275,21 @@ EXPORT_SYMBOL_GPL(phy_exit);
>  
>  int phy_power_on(struct phy *phy)
>  {
> -	int ret;
> +	int ret = 0;
>  
>  	if (!phy)
> -		return 0;
> +		goto out;
>  
>  	if (phy->pwr) {
>  		ret = regulator_enable(phy->pwr);
>  		if (ret)
> -			return ret;
> +			goto out;
>  	}
>  
>  	ret = phy_pm_runtime_get_sync(phy);
>  	if (ret < 0 && ret != -ENOTSUPP)
> -		return ret;
> +		goto err_pm_sync;
> +
>  	ret = 0; /* Override possible ret == -ENOTSUPP */
>  
>  	mutex_lock(&phy->mutex);
> @@ -296,19 +297,20 @@ int phy_power_on(struct phy *phy)
>  		ret = phy->ops->power_on(phy);
>  		if (ret < 0) {
>  			dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
> -			goto out;
> +			goto err_pwr_on;
>  		}
>  	}
>  	++phy->power_count;
>  	mutex_unlock(&phy->mutex);
>  	return 0;
>  
> -out:
> +err_pwr_on:
>  	mutex_unlock(&phy->mutex);
>  	phy_pm_runtime_put_sync(phy);
> +err_pm_sync:
>  	if (phy->pwr)
>  		regulator_disable(phy->pwr);
> -
> +out:
>  	return ret;
>  }
>  EXPORT_SYMBOL_GPL(phy_power_on);
>