diff options
| author | Harsh Jain <harsh@chelsio.com> | 2017-06-23 17:15:11 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-07-12 13:38:08 +0300 |
| commit | d3f1d2f7863137c5d71e64041b48968db29b149e (patch) | |
| tree | e355670658068522a14a1d71698c9d036c0b6869 /drivers/crypto/chelsio/chcr_algo.c | |
| parent | 854b06f768794cd664886ec3ba3a5b1c58d42167 (diff) | |
| download | linux-d3f1d2f7863137c5d71e64041b48968db29b149e.tar.xz | |
crypto: chcr - Avoid algo allocation in softirq.
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 <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/chelsio/chcr_algo.c')
| -rw-r--r-- | drivers/crypto/chelsio/chcr_algo.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index aa4e5b88483d..508cbc79e508 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, |