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From f2a33ce18232919d3831d1c61a06b6067209282d Mon Sep 17 00:00:00 2001
From: Eneas U de Queiroz <cotequeiroz@gmail.com>
Date: Fri, 22 Nov 2019 09:34:29 -0300
Subject: [PATCH] crypto: qce - initialize fallback only for AES
Adjust cra_flags to add CRYPTO_NEED_FALLBACK only for AES ciphers, where
AES-192 is not handled by the qce hardware, and don't allocate & free
the fallback skcipher for anything other than AES.
The rest of the code is unchanged, as the use of the fallback is already
restricted to AES.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
--- a/drivers/crypto/qce/skcipher.c
+++ b/drivers/crypto/qce/skcipher.c
@@ -246,7 +246,15 @@ static int qce_skcipher_init(struct cryp
memset(ctx, 0, sizeof(*ctx));
crypto_skcipher_set_reqsize(tfm, sizeof(struct qce_cipher_reqctx));
+ return 0;
+}
+
+static int qce_skcipher_init_fallback(struct crypto_skcipher *tfm)
+{
+ struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+ int ret;
+ qce_skcipher_init(tfm);
ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(&tfm->base),
0, CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
@@ -375,14 +383,18 @@ static int qce_skcipher_register_one(con
alg->base.cra_priority = 300;
alg->base.cra_flags = CRYPTO_ALG_ASYNC |
- CRYPTO_ALG_NEED_FALLBACK |
CRYPTO_ALG_KERN_DRIVER_ONLY;
alg->base.cra_ctxsize = sizeof(struct qce_cipher_ctx);
alg->base.cra_alignmask = 0;
alg->base.cra_module = THIS_MODULE;
- alg->init = qce_skcipher_init;
- alg->exit = qce_skcipher_exit;
+ if (IS_AES(def->flags)) {
+ alg->base.cra_flags |= CRYPTO_ALG_NEED_FALLBACK;
+ alg->init = qce_skcipher_init_fallback;
+ alg->exit = qce_skcipher_exit;
+ } else {
+ alg->init = qce_skcipher_init;
+ }
INIT_LIST_HEAD(&tmpl->entry);
tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_SKCIPHER;
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