[PATCH v6 07/19] crypto: move pub key to generic async completion

[Gilad Ben-Yossef]

public_key_verify_signature() is starting an async crypto op and
waiting for it to complete. Move it over to generic code doing
the same.

Signed-off-by: Gilad Ben-Yossef <gi...@benyossef.com>
---
 crypto/asymmetric_keys/public_key.c | 28 ++++------------------------
 1 file changed, 4 insertions(+), 24 deletions(-)

diff --git a/crypto/asymmetric_keys/public_key.c 
b/crypto/asymmetric_keys/public_key.c
index 3cd6e12..d916235 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -57,29 +57,13 @@ static void public_key_destroy(void *payload0, void 
*payload3)
        public_key_signature_free(payload3);
 }
 
-struct public_key_completion {
-       struct completion completion;
-       int err;
-};
-
-static void public_key_verify_done(struct crypto_async_request *req, int err)
-{
-       struct public_key_completion *compl = req->data;
-
-       if (err == -EINPROGRESS)
-               return;
-
-       compl->err = err;
-       complete(&compl->completion);
-}
-
 /*
  * Verify a signature using a public key.
  */
 int public_key_verify_signature(const struct public_key *pkey,
                                const struct public_key_signature *sig)
 {
-       struct public_key_completion compl;
+       struct crypto_wait cwait;
        struct crypto_akcipher *tfm;
        struct akcipher_request *req;
        struct scatterlist sig_sg, digest_sg;
@@ -131,20 +115,16 @@ int public_key_verify_signature(const struct public_key 
*pkey,
        sg_init_one(&digest_sg, output, outlen);
        akcipher_request_set_crypt(req, &sig_sg, &digest_sg, sig->s_size,
                                   outlen);
-       init_completion(&compl.completion);
+       crypto_init_wait(&cwait);
        akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
                                      CRYPTO_TFM_REQ_MAY_SLEEP,
-                                     public_key_verify_done, &compl);
+                                     crypto_req_done, &cwait);
 
        /* Perform the verification calculation.  This doesn't actually do the
         * verification, but rather calculates the hash expected by the
         * signature and returns that to us.
         */
-       ret = crypto_akcipher_verify(req);
-       if ((ret == -EINPROGRESS) || (ret == -EBUSY)) {
-               wait_for_completion(&compl.completion);
-               ret = compl.err;
-       }
+       ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
        if (ret < 0)
                goto out_free_output;
 
-- 
2.1.4