[PATCH v4 18/19] crypto: mediatek: move to generic async completion

[Gilad Ben-Yossef]

The mediatek 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/mediatek/mtk-aes.c | 31 +++++--------------------------
 1 file changed, 5 insertions(+), 26 deletions(-)

diff --git a/drivers/crypto/mediatek/mtk-aes.c 
b/drivers/crypto/mediatek/mtk-aes.c
index 9e845e8..e2c7c95 100644
--- a/drivers/crypto/mediatek/mtk-aes.c
+++ b/drivers/crypto/mediatek/mtk-aes.c
@@ -137,11 +137,6 @@ struct mtk_aes_gcm_ctx {
        struct crypto_skcipher *ctr;
 };
 
-struct mtk_aes_gcm_setkey_result {
-       int err;
-       struct completion completion;
-};
-
 struct mtk_aes_drv {
        struct list_head dev_list;
        /* Device list lock */
@@ -936,17 +931,6 @@ static int mtk_aes_gcm_crypt(struct aead_request *req, u64 
mode)
                                    &req->base);
 }
 
-static void mtk_gcm_setkey_done(struct crypto_async_request *req, int err)
-{
-       struct mtk_aes_gcm_setkey_result *result = req->data;
-
-       if (err == -EINPROGRESS)
-               return;
-
-       result->err = err;
-       complete(&result->completion);
-}
-
 /*
  * Because of the hardware limitation, we need to pre-calculate key(H)
  * for the GHASH operation. The result of the encryption operation
@@ -962,7 +946,7 @@ static int mtk_aes_gcm_setkey(struct crypto_aead *aead, 
const u8 *key,
                u32 hash[4];
                u8 iv[8];
 
-               struct mtk_aes_gcm_setkey_result result;
+               struct crypto_wait wait;
 
                struct scatterlist sg[1];
                struct skcipher_request req;
@@ -1002,22 +986,17 @@ static int mtk_aes_gcm_setkey(struct crypto_aead *aead, 
const u8 *key,
        if (!data)
                return -ENOMEM;
 
-       init_completion(&data->result.completion);
+       crypto_init_wait(&data->wait);
        sg_init_one(data->sg, &data->hash, AES_BLOCK_SIZE);
        skcipher_request_set_tfm(&data->req, ctr);
        skcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
                                      CRYPTO_TFM_REQ_MAY_BACKLOG,
-                                     mtk_gcm_setkey_done, &data->result);
+                                     crypto_req_done, &data->wait);
        skcipher_request_set_crypt(&data->req, data->sg, data->sg,
                                   AES_BLOCK_SIZE, data->iv);
 
-       err = crypto_skcipher_encrypt(&data->req);
-       if (err == -EINPROGRESS || err == -EBUSY) {
-               err = wait_for_completion_interruptible(
-                       &data->result.completion);
-               if (!err)
-                       err = data->result.err;
-       }
+       err = crypto_wait_req(crypto_skcipher_encrypt(&data->req),
+                             &data->wait);
        if (err)
                goto out;
 
-- 
2.1.4