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crypto: qce - initialize fallback only for AES

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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 other algorithms.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eneas U de Queiroz 2019-12-20 16:02:17 -03:00 committed by Herbert Xu
parent 3e806a12d1
commit 8ceda88320
1 changed files with 14 additions and 3 deletions
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17
drivers/crypto/qce/skcipher.c
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@ -257,7 +257,14 @@ static int qce_skcipher_init(struct crypto_skcipher *tfm)
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);
qce_skcipher_init(tfm);
ctx->fallback = crypto_alloc_sync_skcipher(crypto_tfm_alg_name(&tfm->base),
0, CRYPTO_ALG_NEED_FALLBACK);
return PTR_ERR_OR_ZERO(ctx->fallback);
@ -387,14 +394,18 @@ static int qce_skcipher_register_one(const struct qce_skcipher_def *def,
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;