linux-kernel - [PATCH 4.9 075/145] ASoC: rockchip: disable clock on error

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Message-Id: <20180223170734.417523447@linuxfoundation.org>
Date:   Fri, 23 Feb 2018 19:26:21 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Stefan Potyra <Stefan.Potyra@...ktrobit.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 075/145] ASoC: rockchip: disable clock on error

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Potyra <Stefan.Potyra@...ktrobit.com>


[ Upstream commit c7b92172a61b91936be985cb9bc499a4ebc6489b ]

Disable the clocks in  rk_spdif_probe when an error occurs after one
of the clocks has been enabled previously.

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

Fixes: f874b80e1571 ASoC: rockchip: Add rockchip SPDIF transceiver driver
Signed-off-by: Stefan Potyra <Stefan.Potyra@...ktrobit.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/rockchip/rockchip_spdif.c |   18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

--- a/sound/soc/rockchip/rockchip_spdif.c
+++ b/sound/soc/rockchip/rockchip_spdif.c
@@ -318,26 +318,30 @@ static int rk_spdif_probe(struct platfor
 	spdif->mclk = devm_clk_get(&pdev->dev, "mclk");
 	if (IS_ERR(spdif->mclk)) {
 		dev_err(&pdev->dev, "Can't retrieve rk_spdif master clock\n");
-		return PTR_ERR(spdif->mclk);
+		ret = PTR_ERR(spdif->mclk);
+		goto err_disable_hclk;
 	}
 
 	ret = clk_prepare_enable(spdif->mclk);
 	if (ret) {
 		dev_err(spdif->dev, "clock enable failed %d\n", ret);
-		return ret;
+		goto err_disable_clocks;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
+	if (IS_ERR(regs)) {
+		ret = PTR_ERR(regs);
+		goto err_disable_clocks;
+	}
 
 	spdif->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "hclk", regs,
 						  &rk_spdif_regmap_config);
 	if (IS_ERR(spdif->regmap)) {
 		dev_err(&pdev->dev,
 			"Failed to initialise managed register map\n");
-		return PTR_ERR(spdif->regmap);
+		ret = PTR_ERR(spdif->regmap);
+		goto err_disable_clocks;
 	}
 
 	spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR;
@@ -369,6 +373,10 @@ static int rk_spdif_probe(struct platfor
 
 err_pm_runtime:
 	pm_runtime_disable(&pdev->dev);
+err_disable_clocks:
+	clk_disable_unprepare(spdif->mclk);
+err_disable_hclk:
+	clk_disable_unprepare(spdif->hclk);
 
 	return ret;
 }