From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4006C3A5A9 for ; Tue, 5 May 2020 01:52:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 74E22206C0 for ; Tue, 5 May 2020 01:52:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gXPkP/U0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74E22206C0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: 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=DlFprgYzzEVrKBa9BEcpTIUnifqzDUiO2rikME6FlmQ=; b=gXPkP/U0awfdvH cAbNr2ygw7zshf5NpjLVoO9IkHIYvU3hlqP8/syc+3YuH3REN6F5R/VE1N9hWLcT/UNhg6KmDx013 enLeM/AadMRK5avL1cXmqhD7xANLzyIKM0p8CUpx57grC0CCD44gmOtU6+w0TMvesV4P6G0pEM8n/ xRVXgwhBMnV1/LVHxA+7G3BC9rUfDH8DgB0jy55b1JPkEX+T4y+FN242ja6CQBOzZ6lZ3jxMQhO+2 LEhNQ9OH2e521JX19OwJcuNnofi5p5CThXULsuEgRDgTV1mRIYrm0vdu5QgLnxEk7E7pT9TJtB8TV bBNK1PqrCI4hf++AntcA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jVmkW-0008OR-I3; Tue, 05 May 2020 01:51:56 +0000 Received: from twspam01.aspeedtech.com ([211.20.114.71]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jVmkT-0008KD-KO for linux-arm-kernel@lists.infradead.org; Tue, 05 May 2020 01:51:55 +0000 Received: from mail.aspeedtech.com (twmbx02.aspeed.com [192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 0451f7XU030462; Tue, 5 May 2020 09:41:07 +0800 (GMT-8) (envelope-from ryan_chen@aspeedtech.com) Received: from TWMBX01.aspeed.com (192.168.0.23) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.620.29; Tue, 5 May 2020 09:51:21 +0800 Received: from TWMBX02.aspeed.com (192.168.0.24) by TWMBX01.aspeed.com (192.168.0.23) with Microsoft SMTP Server (TLS) id 15.0.620.29; Tue, 5 May 2020 09:51:19 +0800 Received: from TWMBX02.aspeed.com ([fe80::997d:c0a7:f01f:e1a7]) by TWMBX02.aspeed.com ([fe80::997d:c0a7:f01f:e1a7%12]) with mapi id 15.00.0620.020; Tue, 5 May 2020 09:51:19 +0800 From: Ryan Chen To: Wolfram Sang Subject: RE: [PATCH v0 linux master] i2c/busses: Avoid i2c interrupt status clear race condition. Thread-Topic: [PATCH v0 linux master] i2c/busses: Avoid i2c interrupt status clear race condition. Thread-Index: AQHWHdeQ1mqTBOPAdE+n+yVhmYVsFKiRMjyAgAeRFwA= Date: Tue, 5 May 2020 01:51:19 +0000 Message-ID: <9192c38a24804689809fa80601ae9126@TWMBX02.aspeed.com> References: <20200429033737.2781-1-ryan_chen@aspeedtech.com> <20200430141701.GC3355@ninjato> In-Reply-To: <20200430141701.GC3355@ninjato> Accept-Language: zh-TW, en-US Content-Language: zh-TW X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.2.87] MIME-Version: 1.0 X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 0451f7XU030462 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200504_185153_921016_975F3827 X-CRM114-Status: UNSURE ( 5.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-aspeed@lists.ozlabs.org" , Andrew Jeffery , Benjamin Herrenschmidt , "openbmc@lists.ozlabs.org" , Brendan Higgins , "linux-kernel@vger.kernel.org" , Joel Stanley , "linux-arm-kernel@lists.infradead.org" , "linux-i2c@vger.kernel.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org > In AST2600 there have a slow peripheral bus between CPU and i2c > controller. > Therefore GIC i2c interrupt status clear have delay timing, when CPU > issue write clear i2c controller interrupt status. > To avoid this issue, the driver need have read after write clear at > i2c ISR. > > Signed-off-by: ryan_chen >Applied to for-current with a Fixes tag, thanks! Please, try to add one next time and please also check how the subsystem formats the $subject line. [Ryan Chen] Thanks your review, will add fixes tag at subject. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel