linux-kernel - Re: [PATCH] phy: samsung: exynos5250-sata: fix missing device put in probe error paths

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Date:   Wed, 13 Apr 2022 15:21:39 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Miaoqian Lin <linmq006@...il.com>,
        linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: samsung: exynos5250-sata: fix missing device put in
 probe error paths

On 09-03-22, 18:00, Krzysztof Kozlowski wrote:
> The actions of of_find_i2c_device_by_node() in probe function should be
> reversed in error paths by putting the reference to obtained device.

This fails to apply on phy-fixes, pls rebase

> 
> Fixes: bcff4cba41bc ("PHY: Exynos: Add Exynos5250 SATA PHY driver")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> 
> ---
> 
> Rebased on top of (although it is independent, no conflicts):
> https://lore.kernel.org/linux-samsung-soc/20220309124856.32632-1-linmq006@gmail.com/T/#u
> ---
>  drivers/phy/samsung/phy-exynos5250-sata.c | 20 ++++++++++++++------
>  1 file changed, 14 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/phy/samsung/phy-exynos5250-sata.c b/drivers/phy/samsung/phy-exynos5250-sata.c
> index 6c305a3fe187..595adba5fb8f 100644
> --- a/drivers/phy/samsung/phy-exynos5250-sata.c
> +++ b/drivers/phy/samsung/phy-exynos5250-sata.c
> @@ -196,20 +196,21 @@ static int exynos_sata_phy_probe(struct platform_device *pdev)
>  	sata_phy->phyclk = devm_clk_get(dev, "sata_phyctrl");
>  	if (IS_ERR(sata_phy->phyclk)) {
>  		dev_err(dev, "failed to get clk for PHY\n");
> -		return PTR_ERR(sata_phy->phyclk);
> +		ret = PTR_ERR(sata_phy->phyclk);
> +		goto put_dev;
>  	}
>  
>  	ret = clk_prepare_enable(sata_phy->phyclk);
>  	if (ret < 0) {
>  		dev_err(dev, "failed to enable source clk\n");
> -		return ret;
> +		goto put_dev;
>  	}
>  
>  	sata_phy->phy = devm_phy_create(dev, NULL, &exynos_sata_phy_ops);
>  	if (IS_ERR(sata_phy->phy)) {
> -		clk_disable_unprepare(sata_phy->phyclk);
>  		dev_err(dev, "failed to create PHY\n");
> -		return PTR_ERR(sata_phy->phy);
> +		ret = PTR_ERR(sata_phy->phy);
> +		goto clk_disable;
>  	}
>  
>  	phy_set_drvdata(sata_phy->phy, sata_phy);
> @@ -217,11 +218,18 @@ static int exynos_sata_phy_probe(struct platform_device *pdev)
>  	phy_provider = devm_of_phy_provider_register(dev,
>  					of_phy_simple_xlate);
>  	if (IS_ERR(phy_provider)) {
> -		clk_disable_unprepare(sata_phy->phyclk);
> -		return PTR_ERR(phy_provider);
> +		ret = PTR_ERR(phy_provider);
> +		goto clk_disable;
>  	}
>  
>  	return 0;
> +
> +clk_disable:
> +	clk_disable_unprepare(sata_phy->phyclk);
> +put_dev:
> +	put_device(&sata_phy->client->dev);
> +
> +	return ret;
>  }
>  
>  static const struct of_device_id exynos_sata_phy_of_match[] = {
> -- 
> 2.32.0

-- 
~Vinod