From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Tue, 16 May 2017 08:27:41 +0000 (+0530)
Subject: crypto: img-hash - Handle return value of clk_prepare_enable
X-Git-Tag: v4.13-rc1~158^2~121
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5f052c9c631d360d6ec6202714b9d6529a21117a;p=karo-tx-linux.git

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@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index 9b07f3d88feb..0c6a917a9ab8 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;
 }