Re: [dm-devel] [PATCH v5 18/19] crypto: mediatek: move to generic async completion

[Ryder Lee]

On Mon, 2017-08-14 at 18:21 +0300, Gilad Ben-Yossef wrote:
> 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 
> ---

Acked-by: Ryder Lee 

>  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)
>   >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(>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(>result.completion);
> + crypto_init_wait(>wait);
>   sg_init_one(data->sg, >hash, AES_BLOCK_SIZE);
>   skcipher_request_set_tfm(>req, ctr);
>   skcipher_request_set_callback(>req, CRYPTO_TFM_REQ_MAY_SLEEP |
> CRYPTO_TFM_REQ_MAY_BACKLOG,
> -   mtk_gcm_setkey_done, >result);
> +   crypto_req_done, >wait);
>   skcipher_request_set_crypt(>req, data->sg, data->sg,
>  AES_BLOCK_SIZE, data->iv);
>  
> - err = crypto_skcipher_encrypt(>req);
> - if (err == -EINPROGRESS || err == -EBUSY) {
> - err = wait_for_completion_interruptible(
> - >result.completion);
> - if (!err)
> - err = data->result.err;
> - }
> + err = crypto_wait_req(crypto_skcipher_encrypt(>req),
> +   >wait);
>   if (err)
>   goto out;
>  


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[dm-devel] [PATCH v5 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 
---
 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)
>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(>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(>result.completion);
+   crypto_init_wait(>wait);
sg_init_one(data->sg, >hash, AES_BLOCK_SIZE);
skcipher_request_set_tfm(>req, ctr);
skcipher_request_set_callback(>req, CRYPTO_TFM_REQ_MAY_SLEEP |
  CRYPTO_TFM_REQ_MAY_BACKLOG,
- mtk_gcm_setkey_done, >result);
+ crypto_req_done, >wait);
skcipher_request_set_crypt(>req, data->sg, data->sg,
   AES_BLOCK_SIZE, data->iv);
 
-   err = crypto_skcipher_encrypt(>req);
-   if (err == -EINPROGRESS || err == -EBUSY) {
-   err = wait_for_completion_interruptible(
-   >result.completion);
-   if (!err)
-   err = data->result.err;
-   }
+   err = crypto_wait_req(crypto_skcipher_encrypt(>req),
+ >wait);
if (err)
goto out;
 
-- 
2.1.4

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