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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, 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 16471C07E9D for ; Mon, 19 Jul 2021 16:46:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC93F61019 for ; Mon, 19 Jul 2021 16:46:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234699AbhGSQGB (ORCPT ); Mon, 19 Jul 2021 12:06:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:40562 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344593AbhGSPGc (ORCPT ); Mon, 19 Jul 2021 11:06:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C6489611CE; Mon, 19 Jul 2021 15:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626709613; bh=dHzZKRZ3FDowREux2qcPuORWFSKvSiAaYuR4hFegqZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k2P/CzpM9P4ehBZuzuSDoh7U0FUrJa/9zRTieAUG8ZAR151jVV1lNAyVV6jY5mWQ5 YRIcCG4APDMhh3qU1gn7Cp+nvdKG/U58uxZD5Ra+wspMmguU672tz2jUvASTGKsaqC kNMuSZvEH1PbZ0LcpItTDhItOa0Vjjc46GGvLq2s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lee Duncan , Mike Christie , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.4 030/149] scsi: iscsi: Add iscsi_cls_conn refcount helpers Date: Mon, 19 Jul 2021 16:52:18 +0200 Message-Id: <20210719144908.646508736@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144901.370365147@linuxfoundation.org> References: <20210719144901.370365147@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Christie [ Upstream commit b1d19e8c92cfb0ded180ef3376c20e130414e067 ] There are a couple places where we could free the iscsi_cls_conn while it's still in use. This adds some helpers to get/put a refcount on the struct and converts an exiting user. Subsequent commits will then use the helpers to fix 2 bugs in the eh code. Link: https://lore.kernel.org/r/20210525181821.7617-11-michael.christie@oracle.com Reviewed-by: Lee Duncan Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/libiscsi.c | 7 ++----- drivers/scsi/scsi_transport_iscsi.c | 12 ++++++++++++ include/scsi/scsi_transport_iscsi.h | 2 ++ 3 files changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index c5b7d18513b6..b9981078375d 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1348,7 +1348,6 @@ void iscsi_session_failure(struct iscsi_session *session, enum iscsi_err err) { struct iscsi_conn *conn; - struct device *dev; spin_lock_bh(&session->frwd_lock); conn = session->leadconn; @@ -1357,10 +1356,8 @@ void iscsi_session_failure(struct iscsi_session *session, return; } - dev = get_device(&conn->cls_conn->dev); + iscsi_get_conn(conn->cls_conn); spin_unlock_bh(&session->frwd_lock); - if (!dev) - return; /* * if the host is being removed bypass the connection * recovery initialization because we are going to kill @@ -1370,7 +1367,7 @@ void iscsi_session_failure(struct iscsi_session *session, iscsi_conn_error_event(conn->cls_conn, err); else iscsi_conn_failure(conn, err); - put_device(dev); + iscsi_put_conn(conn->cls_conn); } EXPORT_SYMBOL_GPL(iscsi_session_failure); diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index a26df7d6d5d1..2f1553d0a10e 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -2308,6 +2308,18 @@ int iscsi_destroy_conn(struct iscsi_cls_conn *conn) } EXPORT_SYMBOL_GPL(iscsi_destroy_conn); +void iscsi_put_conn(struct iscsi_cls_conn *conn) +{ + put_device(&conn->dev); +} +EXPORT_SYMBOL_GPL(iscsi_put_conn); + +void iscsi_get_conn(struct iscsi_cls_conn *conn) +{ + get_device(&conn->dev); +} +EXPORT_SYMBOL_GPL(iscsi_get_conn); + /* * iscsi interface functions */ diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 325ae731d9ad..71c78410e6ab 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -423,6 +423,8 @@ extern void iscsi_remove_session(struct iscsi_cls_session *session); extern void iscsi_free_session(struct iscsi_cls_session *session); extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess, int dd_size, uint32_t cid); +extern void iscsi_put_conn(struct iscsi_cls_conn *conn); +extern void iscsi_get_conn(struct iscsi_cls_conn *conn); extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn); extern void iscsi_unblock_session(struct iscsi_cls_session *session); extern void iscsi_block_session(struct iscsi_cls_session *session); -- 2.30.2