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>

1 files changed, 6 insertions, 2 deletions

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);