From patchwork Thu Oct 17 12:25:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 11195545 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A540C13B1 for ; Thu, 17 Oct 2019 12:26:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 840F321848 for ; Thu, 17 Oct 2019 12:26:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="FSCP1gxG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728554AbfJQM0Y (ORCPT ); Thu, 17 Oct 2019 08:26:24 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:50398 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409377AbfJQM0X (ORCPT ); Thu, 17 Oct 2019 08:26:23 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x9HCQE24084614; Thu, 17 Oct 2019 07:26:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1571315174; bh=/548IYlsZzVpGFlUyLpuldMg6WhApejqtJF4qdDLFY8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=FSCP1gxGgF0OIz9XnlIfJWQr2ZVvUsB50V54Y+CK+gsqhBp3UnfAl/fUICNx/x7fM DFDLNW8+slMGMe3ZLaOaz62HUigsONZxBpH+ifQJCryxE5Qz1DWww6EOFotvaiCp6T fm+KNqka2JkfjYqdtkDwy1A60Tpl6JI5uXeuyQQ4= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x9HCQEJp075376 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 17 Oct 2019 07:26:14 -0500 Received: from DLEE100.ent.ti.com (157.170.170.30) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Thu, 17 Oct 2019 07:26:06 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Thu, 17 Oct 2019 07:26:13 -0500 Received: from sokoban.bb.dnainternet.fi (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id x9HCPxNc073246; Thu, 17 Oct 2019 07:26:12 -0500 From: Tero Kristo To: , , , CC: , Subject: [PATCH 07/10] crypto: omap-aes-gcm: fix corner case with only auth data Date: Thu, 17 Oct 2019 15:25:46 +0300 Message-ID: <20191017122549.4634-8-t-kristo@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191017122549.4634-1-t-kristo@ti.com> References: <20191017122549.4634-1-t-kristo@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Fix a corner case where only authdata is generated, without any provided assocdata / cryptdata. Passing the empty scatterlists to OMAP AES core driver in this case would confuse it, failing to map DMAs. Signed-off-by: Tero Kristo --- drivers/crypto/omap-aes-gcm.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/omap-aes-gcm.c b/drivers/crypto/omap-aes-gcm.c index 9bbedbccfadf..dfd4d1cac421 100644 --- a/drivers/crypto/omap-aes-gcm.c +++ b/drivers/crypto/omap-aes-gcm.c @@ -148,12 +148,14 @@ static int omap_aes_gcm_copy_buffers(struct omap_aes_dev *dd, if (req->src == req->dst || dd->out_sg == sg_arr) flags |= OMAP_CRYPTO_FORCE_COPY; - ret = omap_crypto_align_sg(&dd->out_sg, cryptlen, - AES_BLOCK_SIZE, &dd->out_sgl, - flags, - FLAGS_OUT_DATA_ST_SHIFT, &dd->flags); - if (ret) - return ret; + if (cryptlen) { + ret = omap_crypto_align_sg(&dd->out_sg, cryptlen, + AES_BLOCK_SIZE, &dd->out_sgl, + flags, + FLAGS_OUT_DATA_ST_SHIFT, &dd->flags); + if (ret) + return ret; + } dd->in_sg_len = sg_nents_for_len(dd->in_sg, alen + clen); dd->out_sg_len = sg_nents_for_len(dd->out_sg, clen); @@ -287,8 +289,12 @@ static int omap_aes_gcm_handle_queue(struct omap_aes_dev *dd, return err; err = omap_aes_write_ctrl(dd); - if (!err) - err = omap_aes_crypt_dma_start(dd); + if (!err) { + if (dd->in_sg_len && dd->out_sg_len) + err = omap_aes_crypt_dma_start(dd); + else + omap_aes_gcm_dma_out_callback(dd); + } if (err) { omap_aes_gcm_finish_req(dd, err);