From patchwork Wed Feb 1 14:26:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Organov X-Patchwork-Id: 649951 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 9A2CDC636D7 for ; Wed, 1 Feb 2023 14:27:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232081AbjBAO14 (ORCPT ); Wed, 1 Feb 2023 09:27:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232124AbjBAO1t (ORCPT ); Wed, 1 Feb 2023 09:27:49 -0500 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A89B46811E for ; Wed, 1 Feb 2023 06:27:47 -0800 (PST) Received: by mail-ed1-x534.google.com with SMTP id z11so17876994ede.1 for ; Wed, 01 Feb 2023 06:27:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vxyxFeq00JGhfZF3lbLUVUOmxZ61KQdQmUjeiwFbgw8=; b=TqxSdo+txye/hH+JqDPj5+BHdWVeRBNc0K8jgGttCeHsb3yXb7k+vU36AzeDltqy3v 9tebe7abB0jDHhCl/7e23/HfrTJI4COPeIxtOr5YPWXChODWdRRPYf0PYmNpipTyH7fL CgQSOYJTfF9CPoRmwvjw9GJqQQXYOcPZA6v+4Z0lsfQmeJV52awQRXWerMbk4kjxrEf2 y2GCmwKDqMkTBpD6ik89DmR0SiIBG1cOdivGzo3YmgAGmExSu1BJsNXONBUgdZQPj1W6 EWiSXk4x18qkxpUHuHC1dZGe2bqT+kvHIPi2SWRSVWh2dS2mkDonCAPpdKGLx0UXaAWY 7New== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vxyxFeq00JGhfZF3lbLUVUOmxZ61KQdQmUjeiwFbgw8=; b=ECAHeCgglNzc79lXO9ocaLFMXUiBkBZIU6YZkAJLTZFh+eCmkpgXsUAHU1C1g7M8NK a7oHySA/Di4F+vFRm6/8N9JJiSUhDCsqLy9llHKjCrCJ5s+FMbAHE6KNElJZ6iY2RG59 FUXXge6XC1gN6NHWE4rpHRM29+jqfKyEDfcyeMSHJKSHQwMjjpgsUR3fuDfibsNqaQWg ajvfwuVMWWCRnqrfV7PkTBeRLoNZVBX/kdx78WfCW/AsXqOwjLbgE72x1foakbejXXT1 JaoMWEhez9xEkXosoSHt/Umv7L1z+IA298P7W3EmxrDNdt9jvK4XBIAl5Zw8MbT2j75I 27kw== X-Gm-Message-State: AO0yUKWpcJFOzjsFlfrLfIt9XdhQBAWqYAzkuFlcfTXZmn/yORbvJd4N DfzosjideMfcl4G+iYz0VvA= X-Google-Smtp-Source: AK7set/U/qA9uhgkckwtVXIcYK+eNjL8h6axhavdaN9OZUBKFGGYjKnPrkEhQ7UYDUf9udq8Ns6cYA== X-Received: by 2002:aa7:d0c6:0:b0:49b:4711:f4b4 with SMTP id u6-20020aa7d0c6000000b0049b4711f4b4mr2459599edo.0.1675261666145; Wed, 01 Feb 2023 06:27:46 -0800 (PST) Received: from osv.localdomain ([89.175.180.246]) by smtp.gmail.com with ESMTPSA id cf8-20020a0564020b8800b004a18f2ffb86sm8975564edb.79.2023.02.01.06.27.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Feb 2023 06:27:45 -0800 (PST) From: Sergey Organov To: Greg Kroah-Hartman Cc: linux-serial@vger.kernel.org, Fabio Estevam , Jiri Slaby , Richard Genoud , Sascha Hauer , Shawn Guo , Tim Harvey , =?utf-8?q?Tomasz_Mo=C5=84?= , =?utf-8?q?Uwe_Kle?= =?utf-8?q?ine-K=C3=B6nig?= , Johan Hovold , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Sherry Sun , Stefan Wahren , linux-arm-kernel@lists.infradead.org, NXP Linux Team , Pengutronix Kernel Team , Sergey Organov Subject: [PATCH v1 5/7] serial: imx: remove redundant USR2 read from FIFO reading loop Date: Wed, 1 Feb 2023 17:26:58 +0300 Message-Id: <20230201142700.4346-6-sorganov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230201142700.4346-1-sorganov@gmail.com> References: <87bko4e65y.fsf@osv.gnss.ru> <20230201142700.4346-1-sorganov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org There is no need to read USR2 twice at every loop iteration: get rid of the second read. Signed-off-by: Sergey Organov --- drivers/tty/serial/imx.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 797c441088a9..af4349fe6970 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -904,7 +904,6 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) rx = imx_uart_readl(sport, URXD0); - usr2 = imx_uart_readl(sport, USR2); if (usr2 & USR2_BRCD) { imx_uart_writel(sport, USR2_BRCD, USR2); if (uart_handle_break(&sport->port))