crypto: Use ERR_CAST

Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)).  The former makes more
clear what is the purpose of the operation, which otherwise looks like a
no-op.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T x;
identifier f;
@@

T f (...) { <+...
- ERR_PTR(PTR_ERR(x))
+ x
 ...+> }

@@
expression x;
@@

- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

3 files changed, 3 insertions, 3 deletions

diff --git a/crypto/authenc.c b/crypto/authenc.c
index b9884ee0adb6..a5a22cfcd07b 100644
--- a/crypto/authenc.c
+++ b/crypto/authenc.c
@@ -616,7 +616,7 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb)
         auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
                                CRYPTO_ALG_TYPE_AHASH_MASK);
         if (IS_ERR(auth))
-                return ERR_PTR(PTR_ERR(auth));
+                return ERR_CAST(auth);
 
         auth_base = &auth->base;
 
diff --git a/crypto/ctr.c b/crypto/ctr.c
index 6c3bfabb9d1d..4ca7222cfeb6 100644
--- a/crypto/ctr.c
+++ b/crypto/ctr.c
@@ -185,7 +185,7 @@ static struct crypto_instance *crypto_ctr_alloc(struct rtattr **tb)
         alg = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_CIPHER,
                                   CRYPTO_ALG_TYPE_MASK);
         if (IS_ERR(alg))
-                return ERR_PTR(PTR_ERR(alg));
+                return ERR_CAST(alg);
 
         /* Block size must be >= 4 bytes. */
         err = -EINVAL;
diff --git a/crypto/xts.c b/crypto/xts.c
index d87b0f3102c3..555ecaab1e54 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -224,7 +224,7 @@ static struct crypto_instance *alloc(struct rtattr **tb)
         alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
                                   CRYPTO_ALG_TYPE_MASK);
         if (IS_ERR(alg))
-                return ERR_PTR(PTR_ERR(alg));
+                return ERR_CAST(alg);
 
         inst = crypto_alloc_instance("xts", alg);
         if (IS_ERR(inst))