Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6 into next

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 3.16:

   - Added test vectors for SHA/AES-CCM/DES-CBC/3DES-CBC.
   - Fixed a number of error-path memory leaks in tcrypt.
   - Fixed error-path memory leak in caam.
   - Removed unnecessary global mutex from mxs-dcp.
   - Added ahash walk interface that can actually be asynchronous.
   - Cleaned up caam error reporting.
   - Allow crypto_user get operation to be used by non-root users.
   - Add support for SSS module on Exynos.
   - Misc fixes"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6: (60 commits)
  crypto: testmgr - add aead cbc des, des3_ede tests
  crypto: testmgr - Fix DMA-API warning
  crypto: cesa - tfm->__crt_alg->cra_type directly
  crypto: sahara - tfm->__crt_alg->cra_name directly
  crypto: padlock - tfm->__crt_alg->cra_name directly
  crypto: n2 - tfm->__crt_alg->cra_name directly
  crypto: dcp - tfm->__crt_alg->cra_name directly
  crypto: cesa - tfm->__crt_alg->cra_name directly
  crypto: ccp - tfm->__crt_alg->cra_name directly
  crypto: geode - Don't use tfm->__crt_alg->cra_name directly
  crypto: geode - Weed out printk() from probe()
  crypto: geode - Consistently use AES_KEYSIZE_128
  crypto: geode - Kill AES_IV_LENGTH
  crypto: geode - Kill AES_MIN_BLOCK_SIZE
  crypto: mxs-dcp - Remove global mutex
  crypto: hash - Add real ahash walk interface
  hwrng: n2-drv - Introduce the use of the managed version of kzalloc
  crypto: caam - reinitialize keys_fit_inline for decrypt and givencrypt
  crypto: s5p-sss - fix multiplatform build
  hwrng: timeriomem - remove unnecessary OOM messages
  ...

1 files changed, 36 insertions, 5 deletions

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 6e7223392e80..f2a5d8f656ff 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -15,6 +15,7 @@
 
 #include <crypto/internal/hash.h>
 #include <crypto/scatterwalk.h>
+#include <linux/bug.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -46,7 +47,10 @@ static int hash_walk_next(struct crypto_hash_walk *walk)
 	unsigned int nbytes = min(walk->entrylen,
 				  ((unsigned int)(PAGE_SIZE)) - offset);
 
-	walk->data = kmap_atomic(walk->pg);
+	if (walk->flags & CRYPTO_ALG_ASYNC)
+		walk->data = kmap(walk->pg);
+	else
+		walk->data = kmap_atomic(walk->pg);
 	walk->data += offset;
 
 	if (offset & alignmask) {
@@ -93,8 +97,16 @@ int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)
 		return nbytes;
 	}
 
-	kunmap_atomic(walk->data);
-	crypto_yield(walk->flags);
+	if (walk->flags & CRYPTO_ALG_ASYNC)
+		kunmap(walk->pg);
+	else {
+		kunmap_atomic(walk->data);
+		/*
+		 * The may sleep test only makes sense for sync users.
+		 * Async users don't need to sleep here anyway.
+		 */
+		crypto_yield(walk->flags);
+	}
 
 	if (err)
 		return err;
@@ -124,12 +136,31 @@ int crypto_hash_walk_first(struct ahash_request *req,
 
 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));
 	walk->sg = req->src;
-	walk->flags = req->base.flags;
+	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;
 
 	return hash_walk_new_entry(walk);
 }
 EXPORT_SYMBOL_GPL(crypto_hash_walk_first);
 
+int crypto_ahash_walk_first(struct ahash_request *req,
+			    struct crypto_hash_walk *walk)
+{
+	walk->total = req->nbytes;
+
+	if (!walk->total)
+		return 0;
+
+	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));
+	walk->sg = req->src;
+	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;
+	walk->flags |= CRYPTO_ALG_ASYNC;
+
+	BUILD_BUG_ON(CRYPTO_TFM_REQ_MASK & CRYPTO_ALG_ASYNC);
+
+	return hash_walk_new_entry(walk);
+}
+EXPORT_SYMBOL_GPL(crypto_ahash_walk_first);
+
 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
 				  struct crypto_hash_walk *walk,
 				  struct scatterlist *sg, unsigned int len)
@@ -141,7 +172,7 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
 
 	walk->alignmask = crypto_hash_alignmask(hdesc->tfm);
 	walk->sg = sg;
-	walk->flags = hdesc->flags;
+	walk->flags = hdesc->flags & CRYPTO_TFM_REQ_MASK;
 
 	return hash_walk_new_entry(walk);
 }