linux-kernel - [PATCH v1] crypto: img-hash - Handle return value of clk_prepare

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Message-Id: <1494923261-18884-1-git-send-email-arvind.yadav.cs@gmail.com>
Date:   Tue, 16 May 2017 13:57:41 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        will.thomas@...tec.com
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] crypto: img-hash - Handle return value of clk_prepare_enable

Here, Clock enable can failed. So adding an error check for
clk_prepare_enable.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/crypto/img-hash.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index 9b07f3d8..0c6a917 100644
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -1088,9 +1088,17 @@ static int img_hash_suspend(struct device *dev)
 static int img_hash_resume(struct device *dev)
 {
 	struct img_hash_dev *hdev = dev_get_drvdata(dev);
+	int ret;
 
-	clk_prepare_enable(hdev->hash_clk);
-	clk_prepare_enable(hdev->sys_clk);
+	ret = clk_prepare_enable(hdev->hash_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(hdev->sys_clk);
+	if (ret) {
+		clk_disable_unprepare(hdev->hash_clk);
+		return ret;
+	}
 
 	return 0;
 }
-- 
1.9.1