From patchwork Mon Dec 20 11:21:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenxiang X-Patchwork-Id: 526260 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 7A061C433FE for ; Mon, 20 Dec 2021 11:26:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231828AbhLTL05 (ORCPT ); Mon, 20 Dec 2021 06:26:57 -0500 Received: from szxga01-in.huawei.com ([45.249.212.187]:15945 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231792AbhLTL0v (ORCPT ); Mon, 20 Dec 2021 06:26:51 -0500 Received: from dggeme756-chm.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4JHcfR1YXgzZdjt; Mon, 20 Dec 2021 19:23:43 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by dggeme756-chm.china.huawei.com (10.3.19.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.20; Mon, 20 Dec 2021 19:26:49 +0800 From: chenxiang To: , CC: , , , Xiang Chen Subject: [PATCH v2 07/15] scsi: libsas: Insert PORTE_BROADCAST_RCVD event for resuming host Date: Mon, 20 Dec 2021 19:21:30 +0800 Message-ID: <1639999298-244569-8-git-send-email-chenxiang66@hisilicon.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1639999298-244569-1-git-send-email-chenxiang66@hisilicon.com> References: <1639999298-244569-1-git-send-email-chenxiang66@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggeme756-chm.china.huawei.com (10.3.19.102) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Xiang Chen If a new disk is inserted through an expander when the host was suspended, they will not necessarily be detected as the topology is not re-scanned during resume. To detect possible changes in topology during suspension, insert a PORTE_BROADCAST_RCVD event per port when resuming to trigger a revalidation. Signed-off-by: Xiang Chen Reviewed-by: John Garry --- drivers/scsi/libsas/sas_init.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index 43509d139241..974c4a305ece 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -387,6 +387,30 @@ static int phys_suspended(struct sas_ha_struct *ha) return rc; } +static void sas_resume_insert_broadcast_ha(struct sas_ha_struct *ha) +{ + int i; + + for (i = 0; i < ha->num_phys; i++) { + struct asd_sas_port *port = ha->sas_port[i]; + struct domain_device *dev = port->port_dev; + + if (dev && dev_is_expander(dev->dev_type)) { + struct asd_sas_phy *first_phy; + + spin_lock(&port->phy_list_lock); + first_phy = list_first_entry_or_null( + &port->phy_list, struct asd_sas_phy, + port_phy_el); + spin_unlock(&port->phy_list_lock); + + if (first_phy) + sas_notify_port_event(first_phy, + PORTE_BROADCAST_RCVD, GFP_KERNEL); + } + } +} + static void _sas_resume_ha(struct sas_ha_struct *ha, bool drain) { const unsigned long tmo = msecs_to_jiffies(25000); @@ -419,6 +443,11 @@ static void _sas_resume_ha(struct sas_ha_struct *ha, bool drain) scsi_unblock_requests(ha->core.shost); if (drain) sas_drain_work(ha); + + /* send event PORTE_BROADCAST_RCVD to identify some new inserted + * disks for expander + */ + sas_resume_insert_broadcast_ha(ha); } void sas_resume_ha(struct sas_ha_struct *ha)