From patchwork Thu Jul 13 07:53:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ranjan Kumar X-Patchwork-Id: 702635 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 33DEDEB64DD for ; Thu, 13 Jul 2023 07:53:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232934AbjGMHxz (ORCPT ); Thu, 13 Jul 2023 03:53:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232935AbjGMHxx (ORCPT ); Thu, 13 Jul 2023 03:53:53 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0936A10FA for ; Thu, 13 Jul 2023 00:53:53 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-262e66481c4so127919a91.1 for ; Thu, 13 Jul 2023 00:53:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1689234832; x=1691826832; h=mime-version:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to; bh=W+In7aSTruVKSRb2wWVNqdRITX/H4yzJY6Oz5GGjXcs=; b=iEIynE/sh3afZ+aabvNh1new25hh7vCXseTjJPhpY+Bmqt8K3rTqMuiAepLZFgMRyr ZaSieU139a6/adJ/u1GhxQPg1FM40zY5whCn9KQ3UJsWKR0EFD+BOhv4D2u6DLDKcIRv XRAvXquX/iAknQbd5RfWXwYTgQg1U/jMVzUvc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689234832; x=1691826832; h=mime-version:message-id:date:subject:cc:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=W+In7aSTruVKSRb2wWVNqdRITX/H4yzJY6Oz5GGjXcs=; b=gTZErnGakWCinTLX5RhO3holJ3mtUUCEC4qbUT6mgZw6phIukTLeFjizm2wPZuJhiL 2HxZNrKXa3xGsw5Rh5YKRLPbj4Slx0P3AFsD25XSmsFhc39JYkqIWkPr573MlvtmZMI6 p6oKEVkYos3L6NSD6bweIDldxXfdJzQDzzzJBg0O/xJ5C0PkS4rsopRr9RCmOaPL652J FLY9ClI2CjhD3fHTBZzEqp2ocYuiMHc7qZFHNf1idH4EcMU2xDkYtrnfMZAvOoFuGEpr YkEHiQA+VAzroaAh/z8b64FXM8jNixhIcUE6jqycb4G0+0iAC+7ZhIfYauF/O7aABBLg j8Pw== X-Gm-Message-State: ABy/qLYrmcLOMHG57l6bxuMYae+KLvbZXnkRzzq0dOKWzbI0b+PHx/tv wrSxjQnFUxucsb9Zv8P8Q2oJSI53AuD+8tPBV/1qOcjPLqCHMblcyz8U8It4Fi6IMQehVVl7+mb NowKSlbDCrzK/FzIyNzjTjtFkZ8WpYOa2FZTnZCiBP5RGKLmFDJP8O85TSCTS0N3vD5LwrgxkmG QvXqVaBAXRHg== X-Google-Smtp-Source: APBJJlFhDLH4QR35YfYjnzzue8pAgDJTzcuVVy09XJlqFUsZ6nNfcNmxjgu2Xtqrnp2AJAWFJlihvg== X-Received: by 2002:a17:90a:e644:b0:263:76e8:b66f with SMTP id ep4-20020a17090ae64400b0026376e8b66fmr255525pjb.30.1689234832072; Thu, 13 Jul 2023 00:53:52 -0700 (PDT) Received: from localhost.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id 20-20020a17090a199400b002639c4f81cesm12267519pji.3.2023.07.13.00.53.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Jul 2023 00:53:51 -0700 (PDT) From: Ranjan Kumar To: linux-scsi@vger.kernel.org, martin.petersen@oracle.com Cc: sathya.prakash@broadcom.com, sreekanth.reddy@broadcom.com, Ranjan Kumar Subject: [PATCH v1 0/2] mpt3sas: Additional retries when reading specific registers Date: Thu, 13 Jul 2023 13:23:00 +0530 Message-Id: <20230713075302.10073-1-ranjan.kumar@broadcom.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Doorbell and Host diagnostic registers could return 0 even after 3 retries and that leads to occasional resets of the controllers, hence increased the retry count to thirty. Ranjan Kumar (2): Perform additional retries if Doorbell read returns 0 mpt3sas: Removing volatile qualifier drivers/scsi/mpt3sas/mpi/mpi2.h | 2 +- drivers/scsi/mpt3sas/mpt3sas_base.c | 53 ++++++++++++++++------------- drivers/scsi/mpt3sas/mpt3sas_base.h | 11 +++++- 3 files changed, 40 insertions(+), 26 deletions(-)