crypto: mxs-dcp - Use skcipher for fallback

This patch replaces use of the obsolete ablkcipher with skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c
index 59ed54e..625ee50 100644 (file)
--- a/drivers/crypto/mxs-dcp.c
+++ b/drivers/crypto/mxs-dcp.c
@@ -11,7 +11,6 @@
  * http://www.gnu.org/copyleft/gpl.html
  */
 
-#include <linux/crypto.h>
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -25,6 +24,7 @@
 #include <crypto/aes.h>
 #include <crypto/sha.h>
 #include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
 
 #define DCP_MAX_CHANS  4
 #define DCP_BUF_SZ     PAGE_SIZE
@@ -84,7 +84,7 @@ struct dcp_async_ctx {
        unsigned int                    hot:1;
 
        /* Crypto-specific context */
-       struct crypto_ablkcipher        *fallback;
+       struct crypto_skcipher          *fallback;
        unsigned int                    key_len;
        uint8_t                         key[AES_KEYSIZE_128];
 };
@@ -374,20 +374,22 @@ static int dcp_chan_thread_aes(void *data)
 
 static int mxs_dcp_block_fallback(struct ablkcipher_request *req, int enc)
 {
-       struct crypto_tfm *tfm =
-               crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
-       struct dcp_async_ctx *ctx = crypto_ablkcipher_ctx(
-               crypto_ablkcipher_reqtfm(req));
+       struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
+       struct dcp_async_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+       SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
        int ret;
 
-       ablkcipher_request_set_tfm(req, ctx->fallback);
+       skcipher_request_set_tfm(subreq, ctx->fallback);
+       skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL);
+       skcipher_request_set_crypt(subreq, req->src, req->dst,
+                                  req->nbytes, req->info);
 
        if (enc)
-               ret = crypto_ablkcipher_encrypt(req);
+               ret = crypto_skcipher_encrypt(subreq);
        else
-               ret = crypto_ablkcipher_decrypt(req);
+               ret = crypto_skcipher_decrypt(subreq);
 
-       ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
+       skcipher_request_zero(subreq);
 
        return ret;
 }
@@ -453,28 +455,22 @@ static int mxs_dcp_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
                return 0;
        }
 
-       /* Check if the key size is supported by kernel at all. */
-       if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) {
-               tfm->base.crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-               return -EINVAL;
-       }
-
        /*
         * If the requested AES key size is not supported by the hardware,
         * but is supported by in-kernel software implementation, we use
         * software fallback.
         */
-       actx->fallback->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
-       actx->fallback->base.crt_flags |=
-               tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK;
+       crypto_skcipher_clear_flags(actx->fallback, CRYPTO_TFM_REQ_MASK);
+       crypto_skcipher_set_flags(actx->fallback,
+                                 tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
 
-       ret = crypto_ablkcipher_setkey(actx->fallback, key, len);
+       ret = crypto_skcipher_setkey(actx->fallback, key, len);
        if (!ret)
                return 0;
 
        tfm->base.crt_flags &= ~CRYPTO_TFM_RES_MASK;
-       tfm->base.crt_flags |=
-               actx->fallback->base.crt_flags & CRYPTO_TFM_RES_MASK;
+       tfm->base.crt_flags |= crypto_skcipher_get_flags(actx->fallback) &
+                              CRYPTO_TFM_RES_MASK;
 
        return ret;
 }
@@ -484,9 +480,9 @@ static int mxs_dcp_aes_fallback_init(struct crypto_tfm *tfm)
        const char *name = crypto_tfm_alg_name(tfm);
        const uint32_t flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK;
        struct dcp_async_ctx *actx = crypto_tfm_ctx(tfm);
-       struct crypto_ablkcipher *blk;
+       struct crypto_skcipher *blk;
 
-       blk = crypto_alloc_ablkcipher(name, 0, flags);
+       blk = crypto_alloc_skcipher(name, 0, flags);
        if (IS_ERR(blk))
                return PTR_ERR(blk);
 
@@ -499,8 +495,7 @@ static void mxs_dcp_aes_fallback_exit(struct crypto_tfm *tfm)
 {
        struct dcp_async_ctx *actx = crypto_tfm_ctx(tfm);
 
-       crypto_free_ablkcipher(actx->fallback);
-       actx->fallback = NULL;
+       crypto_free_skcipher(actx->fallback);
 }
 
 /*