From: Harsh Jain Subject: [PATCH] crypto: chcr: Avoid algo allocation in softirq. Date: Fri, 23 Jun 2017 19:45:11 +0530 Message-ID: References: Cc: Harsh Jain To: herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org Return-path: Received: from stargate.chelsio.com ([12.32.117.8]:49844 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752170AbdFWOPj (ORCPT ); Fri, 23 Jun 2017 10:15:39 -0400 In-Reply-To: Sender: linux-crypto-owner@vger.kernel.org List-ID: Thsi patch fixes calling "crypto_alloc_cipher" call in bottom halves. Pre allocate aes cipher required to update Tweak value for XTS. Signed-off-by: Harsh Jain --- drivers/crypto/chelsio/chcr_algo.c | 23 +++++++++++++++-------- drivers/crypto/chelsio/chcr_crypto.h | 1 + 2 files changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index aa4e5b8..508cbc7 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -899,26 +899,20 @@ static int chcr_update_tweak(struct ablkcipher_request *req, u8 *iv) u8 *key; unsigned int keylen; - cipher = crypto_alloc_cipher("aes-generic", 0, 0); + cipher = ablkctx->aes_generic; memcpy(iv, req->info, AES_BLOCK_SIZE); - if (IS_ERR(cipher)) { - ret = -ENOMEM; - goto out; - } keylen = ablkctx->enckey_len / 2; key = ablkctx->key + keylen; ret = crypto_cipher_setkey(cipher, key, keylen); if (ret) - goto out1; + goto out; crypto_cipher_encrypt_one(cipher, iv, iv); for (i = 0; i < (reqctx->processed / AES_BLOCK_SIZE); i++) gf128mul_x_ble((le128 *)iv, (le128 *)iv); crypto_cipher_decrypt_one(cipher, iv, iv); -out1: - crypto_free_cipher(cipher); out: return ret; } @@ -1262,6 +1256,17 @@ static int chcr_cra_init(struct crypto_tfm *tfm) pr_err("failed to allocate fallback for %s\n", alg->cra_name); return PTR_ERR(ablkctx->sw_cipher); } + + if (get_cryptoalg_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_XTS) { + /* To update tweak*/ + ablkctx->aes_generic = crypto_alloc_cipher("aes-generic", 0, 0); + if (IS_ERR(ablkctx->aes_generic)) { + pr_err("failed to allocate aes cipher for tweak\n"); + return PTR_ERR(ablkctx->aes_generic); + } + } else + ablkctx->aes_generic = NULL; + tfm->crt_ablkcipher.reqsize = sizeof(struct chcr_blkcipher_req_ctx); return chcr_device_init(crypto_tfm_ctx(tfm)); } @@ -1292,6 +1297,8 @@ static void chcr_cra_exit(struct crypto_tfm *tfm) struct ablk_ctx *ablkctx = ABLK_CTX(ctx); crypto_free_skcipher(ablkctx->sw_cipher); + if (ablkctx->aes_generic) + crypto_free_cipher(ablkctx->aes_generic); } static int get_alg_config(struct algo_param *params, diff --git a/drivers/crypto/chelsio/chcr_crypto.h b/drivers/crypto/chelsio/chcr_crypto.h index a4f95b0..30af1ee 100644 --- a/drivers/crypto/chelsio/chcr_crypto.h +++ b/drivers/crypto/chelsio/chcr_crypto.h @@ -155,6 +155,7 @@ struct ablk_ctx { struct crypto_skcipher *sw_cipher; + struct crypto_cipher *aes_generic; __be32 key_ctx_hdr; unsigned int enckey_len; unsigned char ciph_mode; -- 2.1.4