From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 21 Oct 2012 11:56:42 +0000 (+0800)
Subject: crypto: tegra - fix missing unlock on error case
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=3200da8d9afb3d0dc617515a2fe364d9d59ef523;p=deliverable%2Flinux.git

crypto: tegra - fix missing unlock on error case

Add the missing unlock on the error handling path in function
tegra_aes_get_random() and tegra_aes_rng_reset().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c
index 37185e6630cd..19adf1c7faa2 100644
--- a/drivers/crypto/tegra-aes.c
+++ b/drivers/crypto/tegra-aes.c
@@ -674,8 +674,10 @@ static int tegra_aes_get_random(struct crypto_rng *tfm, u8 *rdata,
 	mutex_lock(&aes_lock);
 
 	ret = clk_prepare_enable(dd->aes_clk);
-	if (ret)
+	if (ret) {
+		mutex_unlock(&aes_lock);
 		return ret;
+	}
 
 	ctx->dd = dd;
 	dd->ctx = ctx;
@@ -759,8 +761,10 @@ static int tegra_aes_rng_reset(struct crypto_rng *tfm, u8 *seed,
 	dd->flags = FLAGS_ENCRYPT | FLAGS_RNG;
 
 	ret = clk_prepare_enable(dd->aes_clk);
-	if (ret)
+	if (ret) {
+		mutex_unlock(&aes_lock);
 		return ret;
+	}
 
 	aes_set_key(dd);