linux-kernel - [PATCH v7 18/19] crypto: mediatek: move to generic async completion

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Message-Id: <1503584350-7831-19-git-send-email-gilad@benyossef.com>
Date:   Thu, 24 Aug 2017 17:19:05 +0300
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Jonathan Corbet <corbet@....net>,
        David Howells <dhowells@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Gary Hook <gary.hook@....com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Arnaud Ebalard <arno@...isbad.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Shaohua Li <shli@...nel.org>, Steve French <sfrench@...ba.org>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        James Morris <james.l.morris@...cle.com>,
        "Serge E. Hallyn" <serge@...lyn.com>, linux-crypto@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        keyrings@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-raid@...r.kernel.org,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-fscrypt@...r.kernel.org,
        linux-ima-devel@...ts.sourceforge.net,
        linux-ima-user@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org
Cc:     Ofir Drang <ofir.drang@....com>
Subject: [PATCH v7 18/19] crypto: mediatek: move to generic async completion

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 <gilad@...yossef.com>
Acked-by: Ryder Lee <ryder.lee@...iatek.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