From patchwork Mon Mar 6 04:42:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herbert Xu X-Patchwork-Id: 659453 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C7DDC61DA3 for ; Mon, 6 Mar 2023 04:43:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229725AbjCFEnQ (ORCPT ); Sun, 5 Mar 2023 23:43:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229824AbjCFEmo (ORCPT ); Sun, 5 Mar 2023 23:42:44 -0500 Received: from 167-179-156-38.a7b39c.syd.nbn.aussiebb.net (167-179-156-38.a7b39c.syd.nbn.aussiebb.net [167.179.156.38]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D5B71CF5D; Sun, 5 Mar 2023 20:42:32 -0800 (PST) Received: from loth.rohan.me.apana.org.au ([192.168.167.2]) by formenos.hmeau.com with smtp (Exim 4.94.2 #2 (Debian)) id 1pZ2fj-000e1B-Kg; Mon, 06 Mar 2023 12:42:04 +0800 Received: by loth.rohan.me.apana.org.au (sSMTP sendmail emulation); Mon, 06 Mar 2023 12:42:03 +0800 From: "Herbert Xu" Date: Mon, 06 Mar 2023 12:42:03 +0800 Subject: [v5 PATCH 3/7] crypto: stm32 - Simplify finup References: To: Linus Walleij , Lionel Debieve , Li kunyu , davem@davemloft.net, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, mcoquelin.stm32@gmail.com Message-Id: Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org The current finup code is unnecessarily convoluted. There is no need to call update and final separately as update already does all the necessary work on its own. Simplify this by utilising the HASH_FLAGS_FINUP bit in rctx to indicate only finup and use the HASH_FLAGS_FINAL bit instead to signify processing common to both final and finup. Signed-off-by: Herbert Xu --- drivers/crypto/stm32/stm32-hash.c | 41 +++++++++++++++++--------------------- 1 file changed, 19 insertions(+), 22 deletions(-) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 298cabd29e36..e16f9aaec6bf 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -417,7 +417,7 @@ static int stm32_hash_update_cpu(struct stm32_hash_dev *hdev) dev_dbg(hdev->dev, "%s flags %lx\n", __func__, rctx->flags); - final = (rctx->flags & HASH_FLAGS_FINUP); + final = rctx->flags & HASH_FLAGS_FINAL; while ((rctx->total >= rctx->buflen) || (rctx->bufcnt + rctx->total >= rctx->buflen)) { @@ -761,6 +761,11 @@ static int stm32_hash_init(struct ahash_request *req) static int stm32_hash_update_req(struct stm32_hash_dev *hdev) { + struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req); + + if (!(rctx->flags & HASH_FLAGS_CPU)) + return stm32_hash_dma_send(hdev); + return stm32_hash_update_cpu(hdev); } @@ -768,17 +773,14 @@ static int stm32_hash_final_req(struct stm32_hash_dev *hdev) { struct ahash_request *req = hdev->req; struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req); - int err; int buflen = rctx->bufcnt; - rctx->bufcnt = 0; + if (rctx->flags & HASH_FLAGS_FINUP) + return stm32_hash_update_req(hdev); - if (!(rctx->flags & HASH_FLAGS_CPU)) - err = stm32_hash_dma_send(hdev); - else - err = stm32_hash_xmit_cpu(hdev, rctx->buffer, buflen, 1); + rctx->bufcnt = 0; - return err; + return stm32_hash_xmit_cpu(hdev, rctx->buffer, buflen, 1); } static void stm32_hash_emptymsg_fallback(struct ahash_request *req) @@ -1000,7 +1002,7 @@ static int stm32_hash_final(struct ahash_request *req) { struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req); - rctx->flags |= HASH_FLAGS_FINUP; + rctx->flags |= HASH_FLAGS_FINAL; return stm32_hash_enqueue(req, HASH_OP_FINAL); } @@ -1010,25 +1012,20 @@ static int stm32_hash_finup(struct ahash_request *req) struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req); struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx); - int err1, err2; + + if (!req->nbytes) + goto out; rctx->flags |= HASH_FLAGS_FINUP; + rctx->total = req->nbytes; + rctx->sg = req->src; + rctx->offset = 0; if (hdev->dma_lch && stm32_hash_dma_aligned_data(req)) rctx->flags &= ~HASH_FLAGS_CPU; - err1 = stm32_hash_update(req); - - if (err1 == -EINPROGRESS || err1 == -EBUSY) - return err1; - - /* - * final() has to be always called to cleanup resources - * even if update() failed, except EINPROGRESS - */ - err2 = stm32_hash_final(req); - - return err1 ?: err2; +out: + return stm32_hash_final(req); } static int stm32_hash_digest(struct ahash_request *req)