From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752876AbeBEJWY (ORCPT ); Mon, 5 Feb 2018 04:22:24 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:38692 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752673AbeBEJVD (ORCPT ); Mon, 5 Feb 2018 04:21:03 -0500 From: Jianchao Wang To: keith.busch@intel.com, axboe@fb.com, hch@lst.de, sagi@grimberg.me Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 1/6] nvme-pci: quiesce IO queues prior to disabling device HMB accesses Date: Mon, 5 Feb 2018 17:20:10 +0800 Message-Id: <1517822415-11710-2-git-send-email-jianchao.w.wang@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1517822415-11710-1-git-send-email-jianchao.w.wang@oracle.com> References: <1517822415-11710-1-git-send-email-jianchao.w.wang@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8795 signatures=668662 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1802050117 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quiesce IO queues prior to disabling device HMB accesses. A controller using HMB may relay on it to efficiently complete IO commands. Reviewed-by: Keith Busch Signed-off-by: Jianchao Wang --- drivers/nvme/host/pci.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 6fe7af0..00cffed 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2186,7 +2186,10 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) if (!dead) { if (shutdown) nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT); + } + nvme_stop_queues(&dev->ctrl); + if (!dead) { /* * If the controller is still alive tell it to stop using the * host memory buffer. In theory the shutdown / reset should @@ -2195,11 +2198,6 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) */ if (dev->host_mem_descs) nvme_set_host_mem(dev, 0); - - } - nvme_stop_queues(&dev->ctrl); - - if (!dead) { nvme_disable_io_queues(dev); nvme_disable_admin_queue(dev, shutdown); } -- 2.7.4