From patchwork Tue Mar 12 14:11:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingui Yang X-Patchwork-Id: 779969 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 591CC7A726; Tue, 12 Mar 2024 14:12:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.191 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710252768; cv=none; b=KY9fALph9YN12QZrB8qtHCRn657gTtb+nA7QPQBta3uHYQiRv/13rKXdWWQZJYKFLvXxwhae4rBviavlw5kCNRUTyrDYUga8eP3weXaI92e3yYm/EXH84Sl44PZWxKKmoBNAHX2iMDA8AeYpEZ19UoX2mjNzn1DVstvTYJgGPww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710252768; c=relaxed/simple; bh=bmvQ8hOTiSgg1gYAFFWH60u0ekOQ2rtDYr9n67KF1Kk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=QH6yFUxPypxwxm0Vcv6/2EmNzOTf3Qkxbb9S4Yldgub1zXjPHxsOwSahsBznM/oVEfU1d1gI7OjVHgTu9ip77sa5bMUqBC1B3H1l8sHjaiSX9sdzZgFw3IVpDMdAfanmyawrqFitEGCifXoRYkMWeEkulpmA1KVdMe2XC0//sco= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.191 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.163]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4TvFvw1DzFz1FM6g; Tue, 12 Mar 2024 22:12:28 +0800 (CST) Received: from dggpemd100001.china.huawei.com (unknown [7.185.36.94]) by mail.maildlp.com (Postfix) with ESMTPS id EA44718001B; Tue, 12 Mar 2024 22:12:42 +0800 (CST) Received: from localhost.localdomain (10.50.165.33) by dggpemd100001.china.huawei.com (7.185.36.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Tue, 12 Mar 2024 22:12:42 +0800 From: Xingui Yang To: , , , , CC: , , , , , Subject: [PATCH v6 3/4] scsi: libsas: Set port when ex_phy is added or deleted Date: Tue, 12 Mar 2024 14:11:02 +0000 Message-ID: <20240312141103.31358-4-yangxingui@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240312141103.31358-1-yangxingui@huawei.com> References: <20240312141103.31358-1-yangxingui@huawei.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemd100001.china.huawei.com (7.185.36.94) We found that when ex_phy was attached and added to the parent wide port, ex_phy->port was not set, resulting in sas_unregister_devs_sas_addr() not calling sas_port_delete_phy() when deleting the phy, and the deleted phy was still on the parent wide port's phy_list. When we use sas_port_add_ex_phy() to set ex_phy->port to solve the above problem, we find that after all the phys of the parent_port are removed and the number of phy becomes 0, the parent_port will not be set to NULL. Causes the freed parent port to be used when attaching a new ex_phy in sas_ex_add_parent_port(). So use sas_port_add_ex_phy() instead of sas_port_add_phy() to set ex_phy->port when ex_phy is added to the parent port, and set ex_dev->parent_port to NULL when the number of phy on the port becomes 0. Signed-off-by: Xingui Yang --- drivers/scsi/libsas/sas_expander.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index f28a83803947..77daae36232b 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -45,7 +45,7 @@ static void sas_ex_add_parent_port(struct domain_device *dev, int phy_id) BUG_ON(sas_port_add(ex->parent_port)); sas_port_mark_backlink(ex->parent_port); } - sas_port_add_phy(ex->parent_port, ex_phy->phy); + sas_port_add_ex_phy(ex->parent_port, ex_phy); } /* ---------- SMP task management ---------- */ @@ -1879,9 +1879,12 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, if (phy->port) { sas_port_delete_phy(phy->port, phy->phy); sas_device_set_phy(found, phy->port); - if (phy->port->num_phys == 0) + if (phy->port->num_phys == 0) { list_add_tail(&phy->port->del_list, &parent->port->sas_port_del_list); + if (ex_dev->parent_port == phy->port) + ex_dev->parent_port = NULL; + } phy->port = NULL; } }