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Subject[PATCH 14/22] crypto: cavium/nitrox - add check for xts input length equal to zero
Date
From: Andrei Botila <andrei.botila@nxp.com>

Standardize the way input lengths equal to 0 are handled in all skcipher
algorithms. All the algorithms return 0 for input lengths equal to zero.

Cc: Srikanth Jampala <jsrikanth@marvell.com>
Cc: Nagadheeraj Rottela <rnagadheeraj@marvell.com>
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
drivers/crypto/cavium/nitrox/nitrox_skcipher.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/crypto/cavium/nitrox/nitrox_skcipher.c b/drivers/crypto/cavium/nitrox/nitrox_skcipher.c
index a553ac65f324..d76589ebe354 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_skcipher.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_skcipher.c
@@ -249,10 +249,16 @@ static int nitrox_skcipher_crypt(struct skcipher_request *skreq, bool enc)
struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(skreq);
struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(cipher);
struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq);
+ struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
int ivsize = crypto_skcipher_ivsize(cipher);
struct se_crypto_request *creq;
+ const char *name;
int ret;

+ name = crypto_tfm_alg_name(tfm);
+ if (!skreq->cryptlen && flexi_cipher_type(name) == CIPHER_AES_XTS)
+ return 0;
+
creq = &nkreq->creq;
creq->flags = skreq->base.flags;
creq->gfp = (skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
--
2.17.1
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