From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753425AbdKIIY6 (ORCPT ); Thu, 9 Nov 2017 03:24:58 -0500 Received: from mail-io0-f176.google.com ([209.85.223.176]:49842 "EHLO mail-io0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753291AbdKIIY4 (ORCPT ); Thu, 9 Nov 2017 03:24:56 -0500 X-Google-Smtp-Source: ABhQp+RNi5JP/KXqG8/6jBhfLjdGEiRFEpxfd+AR9nMnk+5Kp+h1+NiNwJGSnFRs3UZiNpCkZs9dOw== Subject: [PATCH 10/13] scsi: arcmsr: fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller From: Ching Huang To: martin.petersen@oracle.com, James.Bottomley@HansenPartnership.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, jthumshirn@suse.de, hare@suse.de, dan.carpenter@oracle.com, hch@infradead.org Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Nov 2017 08:24:53 +0800 Message-ID: <1510187093.4523.91.camel@Centos6.3-64> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-37.el6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ching Huang fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller Signed-off-by: Ching Huang --- diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-08 18:54:18.000000000 +0800 +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-08 18:54:58.000000000 +0800 @@ -4202,10 +4202,19 @@ static void arcmsr_clear_doorbell_queue_ case ACB_ADAPTER_TYPE_B: { struct MessageUnit_B *reg = acb->pmuB; - /*clear interrupt and message state*/ - writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell); + uint32_t outbound_doorbell, i; + writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell); writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell); /* let IOP know data has been read */ + for(i=0; i < 200; i++) { + msleep(20); + outbound_doorbell = readl(reg->iop2drv_doorbell); + if( outbound_doorbell & ARCMSR_IOP2DRV_DATA_WRITE_OK) { + writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell); + writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell); + } else + break; + } } break; case ACB_ADAPTER_TYPE_C: {