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Commit a3af1139 authored by Giovanni Cabiddu's avatar Giovanni Cabiddu Committed by Herbert Xu
Browse files

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: default avatarConor Mcloughlin <conor.mcloughlin@intel.com>
Tested-by: default avatarSergey Portnoy <sergey.portnoy@intel.com>
Signed-off-by: default avatarGiovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 96ee111a

drivers/crypto/qat/qat_common/qat_algs.c

+6 −0
Original line number Diff line number Diff line
@@ -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)