[PATCH v3 25/28] crypto: talitos: move to generic async completion

[Gilad Ben-Yossef]

The talitos driver starts several async crypto ops and  waits for their
completions. Move it over to generic code doing the same.

Signed-off-by: Gilad Ben-Yossef <gi...@benyossef.com>
---
 drivers/crypto/talitos.c | 39 +++++----------------------------------
 1 file changed, 5 insertions(+), 34 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 0ab3c4d..bf80d3b 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -2037,22 +2037,6 @@ static int ahash_import(struct ahash_request *areq, 
const void *in)
        return 0;
 }
 
-struct keyhash_result {
-       struct completion completion;
-       int err;
-};
-
-static void keyhash_complete(struct crypto_async_request *req, int err)
-{
-       struct keyhash_result *res = req->data;
-
-       if (err == -EINPROGRESS)
-               return;
-
-       res->err = err;
-       complete(&res->completion);
-}
-
 static int keyhash(struct crypto_ahash *tfm, const u8 *key, unsigned int 
keylen,
                   u8 *hash)
 {
@@ -2060,10 +2044,10 @@ static int keyhash(struct crypto_ahash *tfm, const u8 
*key, unsigned int keylen,
 
        struct scatterlist sg[1];
        struct ahash_request *req;
-       struct keyhash_result hresult;
+       struct crypto_wait wait;
        int ret;
 
-       init_completion(&hresult.completion);
+       crypto_init_wait(&wait);
 
        req = ahash_request_alloc(tfm, GFP_KERNEL);
        if (!req)
@@ -2072,25 +2056,12 @@ static int keyhash(struct crypto_ahash *tfm, const u8 
*key, unsigned int keylen,
        /* Keep tfm keylen == 0 during hash of the long key */
        ctx->keylen = 0;
        ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
-                                  keyhash_complete, &hresult);
+                                  crypto_req_done, &wait);
 
        sg_init_one(&sg[0], key, keylen);
 
-       ahash_request_set_crypt(req, sg, hash, keylen);
-       ret = crypto_ahash_digest(req);
-       switch (ret) {
-       case 0:
-               break;
-       case -EINPROGRESS:
-       case -EIOCBQUEUED:
-               ret = wait_for_completion_interruptible(
-                       &hresult.completion);
-               if (!ret)
-                       ret = hresult.err;
-               break;
-       default:
-               break;
-       }
+       ret = crypto_wait_req(crypto_ahash_digest(req), &wait);
+
        ahash_request_free(req);
 
        return ret;
-- 
2.1.4