linux-kernel - [PATCH] soc: qcom: gsbi: Fix error handling in gsbi

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Message-Id: <1544223424-13884-1-git-send-email-khoroshilov@ispras.ru>
Date:   Sat,  8 Dec 2018 01:57:04 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] soc: qcom: gsbi: Fix error handling in gsbi_probe()

If of_platform_populate() fails in gsbi_probe(),
gsbi->hclk is left undisabled.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/soc/qcom/qcom_gsbi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/qcom/qcom_gsbi.c b/drivers/soc/qcom/qcom_gsbi.c
index 09c669e70d63..038abc377fdb 100644
--- a/drivers/soc/qcom/qcom_gsbi.c
+++ b/drivers/soc/qcom/qcom_gsbi.c
@@ -138,7 +138,7 @@ static int gsbi_probe(struct platform_device *pdev)
 	struct resource *res;
 	void __iomem *base;
 	struct gsbi_info *gsbi;
-	int i;
+	int i, ret;
 	u32 mask, gsbi_num;
 	const struct crci_config *config = NULL;
 
@@ -221,7 +221,10 @@ static int gsbi_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, gsbi);
 
-	return of_platform_populate(node, NULL, NULL, &pdev->dev);
+	ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
+	if (ret)
+		clk_disable_unprepare(gsbi->hclk);
+	return ret;
 }
 
 static int gsbi_remove(struct platform_device *pdev)
-- 
2.7.4