Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.15:

  API:

   - Disambiguate EBUSY when queueing crypto request by adding ENOSPC.
     This change touches code outside the crypto API.
   - Reset settings when empty string is written to rng_current.

  Algorithms:

   - Add OSCCA SM3 secure hash.

  Drivers:

   - Remove old mv_cesa driver (replaced by marvell/cesa).
   - Enable rfc3686/ecb/cfb/ofb AES in crypto4xx.
   - Add ccm/gcm AES in crypto4xx.
   - Add support for BCM7278 in iproc-rng200.
   - Add hash support on Exynos in s5p-sss.
   - Fix fallback-induced error in vmx.
   - Fix output IV in atmel-aes.
   - Fix empty GCM hash in mediatek.

  Others:

   - Fix DoS potential in lib/mpi.
   - Fix potential out-of-order issues with padata"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (162 commits)
  lib/mpi: call cond_resched() from mpi_powm() loop
  crypto: stm32/hash - Fix return issue on update
  crypto: dh - Remove pointless checks for NULL 'p' and 'g'
  crypto: qat - Clean up error handling in qat_dh_set_secret()
  crypto: dh - Don't permit 'key' or 'g' size longer than 'p'
  crypto: dh - Don't permit 'p' to be 0
  crypto: dh - Fix double free of ctx->p
  hwrng: iproc-rng200 - Add support for BCM7278
  dt-bindings: rng: Document BCM7278 RNG200 compatible
  crypto: chcr - Replace _manual_ swap with swap macro
  crypto: marvell - Add a NULL entry at the end of mv_cesa_plat_id_table[]
  hwrng: virtio - Virtio RNG devices need to be re-registered after suspend/resume
  crypto: atmel - remove empty functions
  crypto: ecdh - remove empty exit()
  MAINTAINERS: update maintainer for qat
  crypto: caam - remove unused param of ctx_map_to_sec4_sg()
  crypto: caam - remove unneeded edesc zeroization
  crypto: atmel-aes - Reset the controller before each use
  crypto: atmel-aes - properly set IV after {en,de}crypt
  hwrng: core - Reset user selected rng by writing "" to rng_current
  ...

3 files changed, 13 insertions, 43 deletions

diff --git a/Documentation/crypto/api-samples.rst b/Documentation/crypto/api-samples.rst
index 2531948db89f..006827e30d06 100644
--- a/Documentation/crypto/api-samples.rst
+++ b/Documentation/crypto/api-samples.rst
@@ -7,59 +7,27 @@ Code Example For Symmetric Key Cipher Operation
 ::
 
 
-    struct tcrypt_result {
-        struct completion completion;
-        int err;
-    };
-
     /* tie all data structures together */
     struct skcipher_def {
         struct scatterlist sg;
         struct crypto_skcipher *tfm;
         struct skcipher_request *req;
-        struct tcrypt_result result;
+        struct crypto_wait wait;
     };
 
-    /* Callback function */
-    static void test_skcipher_cb(struct crypto_async_request *req, int error)
-    {
-        struct tcrypt_result *result = req->data;
-
-        if (error == -EINPROGRESS)
-            return;
-        result->err = error;
-        complete(&result->completion);
-        pr_info("Encryption finished successfully\n");
-    }
-
     /* Perform cipher operation */
     static unsigned int test_skcipher_encdec(struct skcipher_def *sk,
                          int enc)
     {
-        int rc = 0;
+        int rc;
 
         if (enc)
-            rc = crypto_skcipher_encrypt(sk->req);
+            rc = crypto_wait_req(crypto_skcipher_encrypt(sk->req), &sk->wait);
         else
-            rc = crypto_skcipher_decrypt(sk->req);
-
-        switch (rc) {
-        case 0:
-            break;
-        case -EINPROGRESS:
-        case -EBUSY:
-            rc = wait_for_completion_interruptible(
-                &sk->result.completion);
-            if (!rc && !sk->result.err) {
-                reinit_completion(&sk->result.completion);
-                break;
-            }
-        default:
-            pr_info("skcipher encrypt returned with %d result %d\n",
-                rc, sk->result.err);
-            break;
-        }
-        init_completion(&sk->result.completion);
+            rc = crypto_wait_req(crypto_skcipher_decrypt(sk->req), &sk->wait);
+
+	if (rc)
+		pr_info("skcipher encrypt returned with result %d\n", rc);
 
         return rc;
     }
@@ -89,8 +57,8 @@ Code Example For Symmetric Key Cipher Operation
         }
 
         skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
-                          test_skcipher_cb,
-                          &sk.result);
+                          crypto_req_done,
+                          &sk.wait);
 
         /* AES 256 with random key */
         get_random_bytes(&key, 32);
@@ -122,7 +90,7 @@ Code Example For Symmetric Key Cipher Operation
         /* We encrypt one block */
         sg_init_one(&sk.sg, scratchpad, 16);
         skcipher_request_set_crypt(req, &sk.sg, &sk.sg, 16, ivdata);
-        init_completion(&sk.result.completion);
+        crypto_init_wait(&sk.wait);
 
         /* encrypt data */
         ret = test_skcipher_encdec(&sk, 1);
diff --git a/Documentation/devicetree/bindings/rng/samsung,exynos-rng4.txt b/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt
index 4ca8dd4d7e66..4ca8dd4d7e66 100644
--- a/Documentation/devicetree/bindings/rng/samsung,exynos-rng4.txt
+++ b/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt
diff --git a/Documentation/devicetree/bindings/rng/brcm,iproc-rng200.txt b/Documentation/devicetree/bindings/rng/brcm,iproc-rng200.txt
index e25a456664b9..0014da9145af 100644
--- a/Documentation/devicetree/bindings/rng/brcm,iproc-rng200.txt
+++ b/Documentation/devicetree/bindings/rng/brcm,iproc-rng200.txt
@@ -1,7 +1,9 @@
 HWRNG support for the iproc-rng200 driver
 
 Required properties:
-- compatible : "brcm,iproc-rng200"
+- compatible : Must be one of:
+	       "brcm,bcm7278-rng200"
+	       "brcm,iproc-rng200"
 - reg : base address and size of control register block
 
 Example: