From patchwork Sat Apr 1 08:15:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Yan X-Patchwork-Id: 669592 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 6664EC77B6D for ; Sat, 1 Apr 2023 08:16:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233639AbjDAIQE (ORCPT ); Sat, 1 Apr 2023 04:16:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233633AbjDAIQC (ORCPT ); Sat, 1 Apr 2023 04:16:02 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3DACFAD0C for ; Sat, 1 Apr 2023 01:16:00 -0700 (PDT) Received: from canpemm100004.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4PpVJR0YZlz17LsY; Sat, 1 Apr 2023 16:12:39 +0800 (CST) Received: from huawei.com (10.175.127.227) by canpemm100004.china.huawei.com (7.192.105.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Sat, 1 Apr 2023 16:15:57 +0800 From: Jason Yan To: , CC: , , , , , , , Jason Yan Subject: [PATCH 3/3] scsi: libsas: Simplify sas_check_parent_topology() Date: Sat, 1 Apr 2023 16:15:26 +0800 Message-ID: <20230401081526.1655279-4-yanaijie@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230401081526.1655279-1-yanaijie@huawei.com> References: <20230401081526.1655279-1-yanaijie@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To canpemm100004.china.huawei.com (7.192.105.92) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Factor out a new helper sas_check_phy_topology() to simplify sas_check_parent_topology(). And centralize the calling of sas_print_parent_topology_bug(). Signed-off-by: Jason Yan --- drivers/scsi/libsas/sas_expander.c | 95 +++++++++++++++++------------- 1 file changed, 55 insertions(+), 40 deletions(-) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index c0841652f0e0..bffcccdbda6b 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -1238,11 +1238,59 @@ static int sas_check_eeds(struct domain_device *child, return res; } -/* Here we spill over 80 columns. It is intentional. - */ -static int sas_check_parent_topology(struct domain_device *child) + +static int sas_check_phy_topology(struct domain_device *child, struct ex_phy *parent_phy) { struct expander_device *child_ex = &child->ex_dev; + struct ex_phy *child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; + struct expander_device *parent_ex = &child->parent->ex_dev; + bool print_topology_bug = false; + int res = 0; + + switch (child->parent->dev_type) { + case SAS_EDGE_EXPANDER_DEVICE: + if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) { + if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || + child_phy->routing_attr != TABLE_ROUTING) { + res = -ENODEV; + print_topology_bug = true; + } + } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { + if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { + res = sas_check_eeds(child, parent_phy, child_phy); + } + else if (child_phy->routing_attr != TABLE_ROUTING) { + res = -ENODEV; + print_topology_bug = true; + } + } else if (parent_phy->routing_attr == TABLE_ROUTING) { + if (child_phy->routing_attr != SUBTRACTIVE_ROUTING && + (child_phy->routing_attr != TABLE_ROUTING || + !child_ex->t2t_supp || !parent_ex->t2t_supp)) { + res = -ENODEV; + print_topology_bug = true; + } + } + break; + case SAS_FANOUT_EXPANDER_DEVICE: + if (parent_phy->routing_attr != TABLE_ROUTING || + child_phy->routing_attr != SUBTRACTIVE_ROUTING) { + res = -ENODEV; + print_topology_bug = true; + } + break; + default: + break; + } + + if (print_topology_bug) + sas_print_parent_topology_bug(child, parent_phy, child_phy); + + return res; +} + +static int sas_check_parent_topology(struct domain_device *child) +{ struct expander_device *parent_ex; int i; int res = 0; @@ -1257,7 +1305,7 @@ static int sas_check_parent_topology(struct domain_device *child) for (i = 0; i < parent_ex->num_phys; i++) { struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; - struct ex_phy *child_phy; + int ret; if (parent_phy->phy_state == PHY_VACANT || parent_phy->phy_state == PHY_NOT_PRESENT) @@ -1266,42 +1314,9 @@ static int sas_check_parent_topology(struct domain_device *child) if (!sas_phy_match_dev_addr(child, parent_phy)) continue; - child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; - - switch (child->parent->dev_type) { - case SAS_EDGE_EXPANDER_DEVICE: - if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) { - if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || - child_phy->routing_attr != TABLE_ROUTING) { - sas_print_parent_topology_bug(child, parent_phy, child_phy); - res = -ENODEV; - } - } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { - if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { - res = sas_check_eeds(child, parent_phy, child_phy); - } else if (child_phy->routing_attr != TABLE_ROUTING) { - sas_print_parent_topology_bug(child, parent_phy, child_phy); - res = -ENODEV; - } - } else if (parent_phy->routing_attr == TABLE_ROUTING) { - if (child_phy->routing_attr != SUBTRACTIVE_ROUTING && - (child_phy->routing_attr != TABLE_ROUTING || - !child_ex->t2t_supp || !parent_ex->t2t_supp)) { - sas_print_parent_topology_bug(child, parent_phy, child_phy); - res = -ENODEV; - } - } - break; - case SAS_FANOUT_EXPANDER_DEVICE: - if (parent_phy->routing_attr != TABLE_ROUTING || - child_phy->routing_attr != SUBTRACTIVE_ROUTING) { - sas_print_parent_topology_bug(child, parent_phy, child_phy); - res = -ENODEV; - } - break; - default: - break; - } + ret = sas_check_phy_topology(child, parent_phy); + if (ret) + res = ret; } return res;