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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 C5CB1C07E9D for ; Mon, 19 Jul 2021 16:24:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B046461629 for ; Mon, 19 Jul 2021 16:24:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347777AbhGSPnf (ORCPT ); Mon, 19 Jul 2021 11:43:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:38792 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348007AbhGSPjr (ORCPT ); Mon, 19 Jul 2021 11:39:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5198E61241; Mon, 19 Jul 2021 16:19:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626711580; bh=HXXsm6bDL23ZwcCamIIW0m6ncof559sel1rCAX8ztzU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OzjsSdkbas8rn4cdp4qEfVgT5qQ7yDCzqClX1Clt6YZ9965qmW/UsipRmOGRi2QDV opZUZVN7ZCur8WFLEogJnvJBOMxDOX/YurLLnZsktpibeNb65xsYREYd95KSsltOaC SqzWyHBaYWw670zszJtRBuK4Gn7lCi7vkFWzVsW4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, ching Huang , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.12 056/292] scsi: arcmsr: Fix doorbell status being updated late on ARC-1886 Date: Mon, 19 Jul 2021 16:51:58 +0200 Message-Id: <20210719144944.370278619@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.514164272@linuxfoundation.org> References: <20210719144942.514164272@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: ching Huang [ Upstream commit d9a231226f28261a787535e08d0c78669e1ad010 ] It is possible for the IOP to be delayed in updating the doorbell status. The doorbell status should not be 0 so loop until the value changes. Link: https://lore.kernel.org/r/afdfdf7eabecf14632492c4987a6b9ac6312a7ad.camel@areca.com.tw Signed-off-by: ching Huang Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/arcmsr/arcmsr_hba.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 930972cda38c..42e494a7106c 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -2419,10 +2419,17 @@ 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 */ -- 2.30.2