From: Raveendra Padasalagi Subject: [PATCH] crypto: brcm - software fallback for cryptlen zero Date: Fri, 23 Jun 2017 13:52:10 +0530 Message-ID: <1498206130-15188-1-git-send-email-raveendra.padasalagi@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, Raveendra Padasalagi To: Herbert Xu , "David S. Miller" , Rob Rice , Scott Branden , Ray Jui , Steve Lin , linux-crypto@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Zero length payload requests are not handled in Broadcom SPU2 engine, so this patch adds conditional check to fallback to software implementation for AES-GCM and AES-CCM algorithms. Signed-off-by: Raveendra Padasalagi Reviewed-by: Ray Jui Reviewed-by: Scott Branden --- drivers/crypto/bcm/cipher.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c index cc0d5b9..6c80863 100644 --- a/drivers/crypto/bcm/cipher.c +++ b/drivers/crypto/bcm/cipher.c @@ -2625,7 +2625,7 @@ static int aead_need_fallback(struct aead_request *req) */ if (((ctx->cipher.mode == CIPHER_MODE_GCM) || (ctx->cipher.mode == CIPHER_MODE_CCM)) && - (req->assoclen == 0)) { + ((req->assoclen == 0) || (req->cryptlen == 0))) { if ((rctx->is_encrypt && (req->cryptlen == 0)) || (!rctx->is_encrypt && (req->cryptlen == ctx->digestsize))) { flow_log("AES GCM/CCM needs fallback for 0 len req\n"); -- 1.9.1