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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 5415BC43331 for ; Fri, 6 Sep 2019 12:59:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2DC0A2082C for ; Fri, 6 Sep 2019 12:59:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405065AbfIFM7S (ORCPT ); Fri, 6 Sep 2019 08:59:18 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:6696 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2404884AbfIFM6N (ORCPT ); Fri, 6 Sep 2019 08:58:13 -0400 Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id C61FA35816A01BA2A796; Fri, 6 Sep 2019 20:58:10 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.439.0; Fri, 6 Sep 2019 20:58:01 +0800 From: John Garry To: , CC: , , , Luo Jiaxing , "John Garry" Subject: [PATCH 03/13] scsi: hisi_sas: Directly return when running I_T_nexus reset if phy disabled Date: Fri, 6 Sep 2019 20:55:27 +0800 Message-ID: <1567774537-20003-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1567774537-20003-1-git-send-email-john.garry@huawei.com> References: <1567774537-20003-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Luo Jiaxing At hisi_sas_debug_I_T_nexus_reset(), we call sas_phy_reset() to reset a phy. But if the phy is disabled, sas_phy_reset() will directly return -ENODEV without issue a phy reset request. If so, We can directly return -ENODEV to libsas before issue a phy reset. Signed-off-by: Luo Jiaxing Signed-off-by: John Garry --- drivers/scsi/hisi_sas/hisi_sas_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 47faa283312e..5642c53cccae 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -1752,6 +1752,11 @@ static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) DECLARE_COMPLETION_ONSTACK(phyreset); int rc, reset_type; + if (!local_phy->enabled) { + sas_put_local_phy(local_phy); + return -ENODEV; + } + if (scsi_is_sas_phy_local(local_phy)) { struct asd_sas_phy *sas_phy = sas_ha->sas_phy[local_phy->number]; -- 2.17.1