From patchwork Mon Jul 10 15:49:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13307242 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 D85B7C001B0 for ; Mon, 10 Jul 2023 15:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232278AbjGJPtw (ORCPT ); Mon, 10 Jul 2023 11:49:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233590AbjGJPtt (ORCPT ); Mon, 10 Jul 2023 11:49:49 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2854187; Mon, 10 Jul 2023 08:49:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1689004186; x=1720540186; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vBn0rQkEvhyNS8x5dx+OCo1BBkRa+6Quzvw7Xp2sQ+U=; b=c9A/RJz0XWvj4cFFGeif9AVCOZqiLSpQ8sgFktP0B1GyWNDV5yWYliDS 05KHFZC0+Aflt2QmRPURtcDynjEaHW0HtKYmn7JgxRIdS69U8fQUvtIdQ xGDcodwh1/1ESHelVNJzE0XQf4QzaMkifWvrZv5dQnVM5KALB92pYSyHZ sJZNiGxVw2IWpqBpTRECRpr5+8TZd+Dg9aNkjFTt0ZaMWNhZKAqNlPJBi 0mW8MNdcg6jq5LVKgknka2ruzDX1thNg60GNqMSUQ9Z0ok40Ui05s1brE pYcayTM9fWpDrbi/5/jBIfdKzI2yLH+YHa5B1uGZhoCVni9drxZO/H2/W A==; X-IronPort-AV: E=McAfee;i="6600,9927,10767"; a="349185378" X-IronPort-AV: E=Sophos;i="6.01,194,1684825200"; d="scan'208";a="349185378" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2023 08:49:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10767"; a="844921835" X-IronPort-AV: E=Sophos;i="6.01,194,1684825200"; d="scan'208";a="844921835" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga004.jf.intel.com with ESMTP; 10 Jul 2023 08:49:31 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 4B00D3E3; Mon, 10 Jul 2023 18:49:34 +0300 (EEST) From: Andy Shevchenko To: Mark Brown , Cristian Ciocaltea , Yang Yingliang , Andy Shevchenko , Amit Kumar Mahapatra via Alsa-devel , Neil Armstrong , Tharun Kumar P , Vijaya Krishna Nivarthi , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?q?=C3=B6nig?= , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-riscv@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: Sanjay R Mehta , Radu Pirea , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , Tudor Ambarus , Serge Semin , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Matthias Brugger , AngeloGioacchino Del Regno , Andy Gross , Bjorn Andersson , Konrad Dybcio , Heiko Stuebner , Palmer Dabbelt , Paul Walmsley , Orson Zhai , Baolin Wang , Chunyan Zhang , Alain Volmat , Maxime Coquelin , Alexandre Torgue , Max Filippov , Steven Rostedt , Masami Hiramatsu , Richard Cochran Subject: [PATCH v2 03/15] spi: Replace if-else-if by bitops and multiplications Date: Mon, 10 Jul 2023 18:49:20 +0300 Message-Id: <20230710154932.68377-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20230710154932.68377-1-andriy.shevchenko@linux.intel.com> References: <20230710154932.68377-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Instead of if-else-if, simply call roundup_pow_of_two(BITS_PER_BYTES()). Note, there is no division assumed as compiler may optimize it away. Signed-off-by: Andy Shevchenko --- drivers/spi/spi.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 6d74218cf38e..125dea8fae00 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -3643,13 +3643,7 @@ int spi_split_transfers_maxwords(struct spi_controller *ctlr, size_t maxsize; int ret; - if (xfer->bits_per_word <= 8) - maxsize = maxwords; - else if (xfer->bits_per_word <= 16) - maxsize = 2 * maxwords; - else - maxsize = 4 * maxwords; - + maxsize = maxwords * roundup_pow_of_two(BITS_TO_BYTES(xfer->bits_per_word)); if (xfer->len > maxsize) { ret = __spi_split_transfer_maxsize(ctlr, msg, &xfer, maxsize, gfp);