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

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Date:   Fri, 11 Mar 2022 07:24:53 +0530
From:   "Alim Akhtar" <alim.akhtar@...sung.com>
To:     "'Krzysztof Kozlowski'" <krzysztof.kozlowski@...onical.com>,
        "'Kishon Vijay Abraham I'" <kishon@...com>,
        "'Vinod Koul'" <vkoul@...nel.org>,
        "'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

Hi Krzysztof

>-----Original Message-----
>From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...onical.com]
>Sent: Wednesday, March 9, 2022 10:30 PM
>To: Kishon Vijay Abraham I <kishon@...com>; Vinod Koul
><vkoul@...nel.org>; Krzysztof Kozlowski
><krzysztof.kozlowski@...onical.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: [PATCH] phy: samsung: exynos5250-sata: fix missing device put in
>probe error paths
>
>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.
>
>Fixes: bcff4cba41bc ("PHY: Exynos: Add Exynos5250 SATA PHY driver")
>Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>
Thanks for fixing this.

Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>

>---
>
>Rebased on top of (although it is independent, no conflicts):
>https://lore.kernel.org/linux-samsung-soc/20220309124856.32632-1-
>linmq006@...il.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