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=-15.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=ham 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 4A65BC433B4 for ; Thu, 20 May 2021 06:55:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CB7E60E0B for ; Thu, 20 May 2021 06:55:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230471AbhETG4p (ORCPT ); Thu, 20 May 2021 02:56:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231211AbhETG4i (ORCPT ); Thu, 20 May 2021 02:56:38 -0400 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA4B5C06138B for ; Wed, 19 May 2021 23:55:16 -0700 (PDT) Received: by mail-pg1-x536.google.com with SMTP id m190so11180640pga.2 for ; Wed, 19 May 2021 23:55:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=areca-com-tw.20150623.gappssmtp.com; s=20150623; h=message-id:subject:from:to:date:mime-version :content-transfer-encoding; bh=ZjS8xGFFsqpY9xijPZhdC83gL+fsRNLiJRhnKCIKzUQ=; b=1iZbCenGWJR+Gq+PkkIqnRRZ+TQLPknki+a/FzBCbMOIYlG1lE5Qjy53Fbl2ArcV8v eYLoTN6qmfiOKcWk81FSAO7E4N3l69XwQb/Yj2OPrtNtedrmKCjFA3dVnRyt/UgUVJ/Q rFvB42vp33aMC3vCO5mD7EuC9agSBgGHoGwF2RlXyZI7DCCv89HN4wSxyX6D0DX1qqop OqSuekeZsLN9drD+WumT7XJhuYGBUAv3xwrz3vFtXDi4z8b28UtpjzOAFZepPGuuUAC9 QxkkO7wBB0yKH22+udP4ozFjzvrNY80VMSHoJbxzrvjZ+Yfc2S6E15S4WfTH+UMJEn7U gZ1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:date:mime-version :content-transfer-encoding; bh=ZjS8xGFFsqpY9xijPZhdC83gL+fsRNLiJRhnKCIKzUQ=; b=OwcohV181tqoWvd4RdEcUGuXdGv7VlnfvdDbcdyPu4K/OpSGaerewbGteI1oLE/0o0 4ER/cBAN4kogh80km2ultWareIlmTrNz5ryvXhLm0Y5UUJYyhVA+f4YZJOiOYidOQyY0 1hRQLwUSwUIlJ77wyt0Qt8hl63/kTzspYCV7izy9AcqpuMqFQrB33snM6zeqnQVLFmp0 WUViEA5rls3PSYUbsS8kRPSt2oJoz0sl38oc0i4BGjNloWDIOIvOyEY7hfR83OdvCZxq 9RqrgRq5BotYYgLR+UD7JuhvgnzoiJlJW5PvZoCu4cqY6GrJ1Hhp9TpV0qewhJNvi+XA wFDg== X-Gm-Message-State: AOAM533PL0xoN7eqMrUzNB8V1GwmTXVMeBDxqetCMHeOZc9z6fU/8Pcs kfR9v8lKqLBW/B05Mp5XkIim9MFXF/dpGA== X-Google-Smtp-Source: ABdhPJy+fHfKlDcRouTuFnvCP1d8yx1p1XIwLbfbS+jF/ATbMclvspleZhwvFtNwItf/I2fQSmy0Hg== X-Received: by 2002:a63:3dc5:: with SMTP id k188mr3071051pga.140.1621493716420; Wed, 19 May 2021 23:55:16 -0700 (PDT) Received: from centos78 (60-248-88-209.HINET-IP.hinet.net. [60.248.88.209]) by smtp.gmail.com with ESMTPSA id g202sm1160918pfb.54.2021.05.19.23.55.14 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 19 May 2021 23:55:16 -0700 (PDT) Message-ID: Subject: [PATCH 1/2] scsi: arcmsr: fix doorbell status may arrived late on ARC-1886 From: ching Huang To: martin.petersen@oracle.com, James.Bottomley@HansenPartnership.com, linux-scsi@vger.kernel.org, Linux Kernel Mailing List Date: Thu, 20 May 2021 14:55:15 +0800 Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-10.el7) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: ching Huang This patch fix the doorbell status coming from IOP may late. The doorbell status value should not be 0. Signed-off-by: ching Huang --- diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 930972c..98e3d57 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -2419,10 +2419,18 @@ static void arcmsr_hbaD_doorbell_isr(struct AdapterControlBlock *pACB) static void arcmsr_hbaE_doorbell_isr(struct AdapterControlBlock *pACB) { - uint32_t outbound_doorbell, in_doorbell, tmp; + uint32_t outbound_doorbell, in_doorbell, tmp, i; struct MessageUnit_E __iomem *reg = pACB->pmuE; - in_doorbell = readl(®->iobound_doorbell); + if (pACB->adapter_type == ACB_ADAPTER_TYPE_F) { + for (i = 0; i < 5; i++) { + in_doorbell = readl(®->iobound_doorbell); + if (in_doorbell != 0) + break; + } + } + else + in_doorbell = readl(®->iobound_doorbell); outbound_doorbell = in_doorbell ^ pACB->in_doorbell; do { writel(0, ®->host_int_status); /* clear interrupt */