From patchwork Wed May 24 19:06:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoine Tenart X-Patchwork-Id: 9746997 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 738B1601C2 for ; Wed, 24 May 2017 21:42:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6588A26B41 for ; Wed, 24 May 2017 21:42:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 59F4A26E1A; Wed, 24 May 2017 21:42:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CA22A26B41 for ; Wed, 24 May 2017 21:42:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=/DYE1FDUAt5G8bpfW1hSey5uLRXmaCp5+UFF+oksBYk=; b=ml/lSy+aAAN5ifBXAS/SRzSXuQ wSoqGeeUiXZW685R3rsJJuJZBKX6hxDxgvuynco7xn8hRe9eJQNbJgVftSNGuNmQM/l+WdJhHQBqh nu1W/H4Uc/uelTCYnY8rLSqtd/xKi3lXlzkzw9mDTgWEnUoDpKIk+EeXM7ZvNQsXx4nrSzaV4rNNC vNC6Isfx4idQV4y5cZVBK+B6N17/f9M5q14ngJ/rAkZkDOLtTU/PjlU+5hb12dZKkFRIg2LGnDEuP Ag6zGhKYmrQdGTAvavRUsJd8TydoInsZK1WM+zmfPqc4li57KLumx4i0DOMlDNTqNWbQvm6Vzpjwk RFT3ej2A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dDe3N-0000yW-KT; Wed, 24 May 2017 21:42:49 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dDdoy-0001ee-6U for linux-arm-kernel@lists.infradead.org; Wed, 24 May 2017 21:28:00 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 9128A20BB8; Wed, 24 May 2017 23:27:20 +0200 (CEST) Received: from localhost (unknown [80.12.37.224]) by mail.free-electrons.com (Postfix) with ESMTPSA id 551F520857; Wed, 24 May 2017 23:27:20 +0200 (CEST) From: Antoine Tenart To: herbert@gondor.apana.org.au, davem@davemloft.net, maxime.ripard@free-electrons.com, wens@csie.org, clabbe.montjoie@gmail.com Subject: [PATCH 08/11] crypto: sun4i-ss: use GENMASK to generate masks Date: Wed, 24 May 2017 21:06:49 +0200 Message-Id: <20170524190652.13278-9-antoine.tenart@free-electrons.com> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170524190652.13278-1-antoine.tenart@free-electrons.com> References: <20170524190652.13278-1-antoine.tenart@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170524_142757_021885_346F27C3 X-CRM114-Status: GOOD ( 10.45 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Antoine Tenart , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Use the GENMASK helper instead of custom calculations to generate masks, It also helps the readability. Signed-off-by: Antoine Tenart --- drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index 0c2efc88bc0a..685de5b6ab17 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -384,11 +384,14 @@ static int sun4i_hash(struct ahash_request *areq) writesl(ss->base + SS_RXFIFO, op->buf, nwait); op->byte_count += 4 * nwait; } + nbw = op->len - 4 * nwait; - wb = *(u32 *)(op->buf + nwait * 4); - wb &= (0xFFFFFFFF >> (4 - nbw) * 8); + if (nbw) { + wb = *(u32 *)(op->buf + nwait * 4); + wb &= GENMASK((nbw * 8) - 1, 0); - op->byte_count += nbw; + op->byte_count += nbw; + } } /* write the remaining bytes of the nbw buffer */