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crypto: qat - do not offload zero length requests 

If a zero length request is submitted through the skcipher api,
do not offload it and return success.

Reviewed-by: Conor Mcloughlin <conor.mcloughlin@intel.com>
Tested-by: Sergey Portnoy <sergey.portnoy@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu 2019-04-29 16:43:21 +01:00 committed by Herbert Xu
parent 96ee111a65
commit a3af11399a
1 changed files with 6 additions and 0 deletions
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6
drivers/crypto/qat/qat_common/qat_algs.c
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@ -1058,6 +1058,9 @@ static int qat_alg_ablkcipher_encrypt(struct ablkcipher_request *req)
struct device *dev = &GET_DEV(ctx->inst->accel_dev);
int ret, ctr = 0;
if (req->nbytes == 0)
return 0;
qat_req->iv = dma_alloc_coherent(dev, AES_BLOCK_SIZE,
&qat_req->iv_paddr, GFP_ATOMIC);
if (!qat_req->iv)
@ -1115,6 +1118,9 @@ static int qat_alg_ablkcipher_decrypt(struct ablkcipher_request *req)
struct device *dev = &GET_DEV(ctx->inst->accel_dev);
int ret, ctr = 0;
if (req->nbytes == 0)
return 0;
qat_req->iv = dma_alloc_coherent(dev, AES_BLOCK_SIZE,
&qat_req->iv_paddr, GFP_ATOMIC);
if (!qat_req->iv)