linux-kernel - [PATCH v1] dmaengine: DW DMAC: Handle return value of clk_prepare

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Message-Id: <1495449108-31532-1-git-send-email-arvind.yadav.cs@gmail.com>
Date:   Mon, 22 May 2017 16:01:48 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     vireshk@...nel.org, andriy.shevchenko@...ux.intel.com,
        dan.j.williams@...el.com, vinod.koul@...el.com
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] dmaengine: DW DMAC: Handle return value of clk_prepare_enable

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/dma/dw/platform.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index c639c60..bc31fe8 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -306,8 +306,12 @@ static int dw_resume_early(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dw_dma_chip *chip = platform_get_drvdata(pdev);
+	int ret;
+
+	ret = clk_prepare_enable(chip->clk);
+	if (ret)
+		return ret;
 
-	clk_prepare_enable(chip->clk);
 	return dw_dma_enable(chip);
 }
 
-- 
1.9.1