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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0BC6CC07E9B for ; Sat, 10 Jul 2021 02:28:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE2AD613D9 for ; Sat, 10 Jul 2021 02:28:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232864AbhGJCb1 (ORCPT ); Fri, 9 Jul 2021 22:31:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:41746 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232763AbhGJC2J (ORCPT ); Fri, 9 Jul 2021 22:28:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 07E3B613F7; Sat, 10 Jul 2021 02:24:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625883899; bh=koMInF0pTJ4jH9nnaDMP7JTIKBlVOtHo4QGr2fpwcdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BNI99Wu+5aER/vWlfeM0itQjQlfQ6RwYkQQ2K2wpVGWH8aHdbLXFDA6grZUm8UKUz Fn8QJaoQwzWwSKUteK5sAKKti+XXi1Y0yMs8SsYdhKMt7TQbGVMvGiTc0d5/tX6N/O xtTieQt8H2+GaI1A1mCFg2pbiLUUsZkk3m0vfgqLf0BR/kca4GcBQ1d429ZNIW2KEy Z1QH5sYMOreeTZd8E9ZWvqR3SozwGxwYsebDyoI4SGx5qmqZ07sllslcSxEvSTWE7/ dJzSCm69GC1+sjgXnb79Q5f49cSrJeoAWkwNuMI+TRQGsnSy5oEcqLs1ypU+g6v4Un t3M7J8/L9QtNg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: ching Huang , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 23/93] scsi: arcmsr: Fix doorbell status being updated late on ARC-1886 Date: Fri, 9 Jul 2021 22:23:17 -0400 Message-Id: <20210710022428.3169839-23-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210710022428.3169839-1-sashal@kernel.org> References: <20210710022428.3169839-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 4838f790dac7..9294a2c677b3 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -2424,10 +2424,17 @@ 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