crypto: vmx - Use skcipher for cbc fallback

Cc: stable@vger.kernel.org #4.10
Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 24 insertions, 23 deletions

diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c
index 94ad5c0adbcb..72a26eb4e954 100644
--- a/drivers/crypto/vmx/aes_cbc.c
+++ b/drivers/crypto/vmx/aes_cbc.c
@@ -27,11 +27,12 @@
 #include <asm/switch_to.h>
 #include <crypto/aes.h>
 #include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
 
 #include "aesp8-ppc.h"
 
 struct p8_aes_cbc_ctx {
-        struct crypto_blkcipher *fallback;
+        struct crypto_skcipher *fallback;
         struct aes_key enc_key;
         struct aes_key dec_key;
 };
@@ -39,7 +40,7 @@ struct p8_aes_cbc_ctx {
 static int p8_aes_cbc_init(struct crypto_tfm *tfm)
 {
         const char *alg;
-        struct crypto_blkcipher *fallback;
+        struct crypto_skcipher *fallback;
         struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
 
         if (!(alg = crypto_tfm_alg_name(tfm))) {
@@ -47,8 +48,9 @@ static int p8_aes_cbc_init(struct crypto_tfm *tfm)
                 return -ENOENT;
         }
 
-        fallback =
-            crypto_alloc_blkcipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK);
+        fallback = crypto_alloc_skcipher(alg, 0,
+                        CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+
         if (IS_ERR(fallback)) {
                 printk(KERN_ERR
                        "Failed to allocate transformation for '%s': %ld\n",
@@ -56,11 +58,12 @@ static int p8_aes_cbc_init(struct crypto_tfm *tfm)
                 return PTR_ERR(fallback);
         }
         printk(KERN_INFO "Using '%s' as fallback implementation.\n",
-               crypto_tfm_alg_driver_name((struct crypto_tfm *) fallback));
+                crypto_skcipher_driver_name(fallback));
+
 
-        crypto_blkcipher_set_flags(
+        crypto_skcipher_set_flags(
                 fallback,
-                crypto_blkcipher_get_flags((struct crypto_blkcipher *)tfm));
+                crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
         ctx->fallback = fallback;
 
         return 0;
@@ -71,7 +74,7 @@ static void p8_aes_cbc_exit(struct crypto_tfm *tfm)
         struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
 
         if (ctx->fallback) {
-                crypto_free_blkcipher(ctx->fallback);
+                crypto_free_skcipher(ctx->fallback);
                 ctx->fallback = NULL;
         }
 }
@@ -91,7 +94,7 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
         pagefault_enable();
         preempt_enable();
 
-        ret += crypto_blkcipher_setkey(ctx->fallback, key, keylen);
+        ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
         return ret;
 }
 
@@ -103,15 +106,14 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         struct p8_aes_cbc_ctx *ctx =
                 crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
-        struct blkcipher_desc fallback_desc = {
-                .tfm = ctx->fallback,
-                .info = desc->info,
-                .flags = desc->flags
-        };
 
         if (in_interrupt()) {
-                ret = crypto_blkcipher_encrypt(&fallback_desc, dst, src,
-                                               nbytes);
+                SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+                skcipher_request_set_tfm(req, ctx->fallback);
+                skcipher_request_set_callback(req, desc->flags, NULL, NULL);
+                skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
+                ret = crypto_skcipher_encrypt(req);
+                skcipher_request_zero(req);
         } else {
                 preempt_disable();
                 pagefault_disable();
@@ -144,15 +146,14 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         struct p8_aes_cbc_ctx *ctx =
                 crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
-        struct blkcipher_desc fallback_desc = {
-                .tfm = ctx->fallback,
-                .info = desc->info,
-                .flags = desc->flags
-        };
 
         if (in_interrupt()) {
-                ret = crypto_blkcipher_decrypt(&fallback_desc, dst, src,
-                                               nbytes);
+                SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+                skcipher_request_set_tfm(req, ctx->fallback);
+                skcipher_request_set_callback(req, desc->flags, NULL, NULL);
+                skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
+                ret = crypto_skcipher_decrypt(req);
+                skcipher_request_zero(req);
         } else {
                 preempt_disable();
                 pagefault_disable();