From patchwork Tue Nov 28 18:40:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 10080881 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6F98A602BC for ; Tue, 28 Nov 2017 18:40:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6809029584 for ; Tue, 28 Nov 2017 18:40:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5D3B52958F; Tue, 28 Nov 2017 18:40:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0B4FD29584 for ; Tue, 28 Nov 2017 18:40:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753997AbdK1Sky (ORCPT ); Tue, 28 Nov 2017 13:40:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35028 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753392AbdK1Skx (ORCPT ); Tue, 28 Nov 2017 13:40:53 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9724737E7A; Tue, 28 Nov 2017 18:40:53 +0000 (UTC) Received: from rh2.redhat.com (ovpn-125-222.rdu2.redhat.com [10.10.125.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id 78CD3600D1; Tue, 28 Nov 2017 18:40:52 +0000 (UTC) From: Mike Christie To: target-devel@vger.kernel.org, nab@linux-iscsi.org Cc: Mike Christie Subject: [PATCH 08/15] tcmu: simplify scatter_data_area error handling Date: Tue, 28 Nov 2017 12:40:34 -0600 Message-Id: <1511894441-8626-9-git-send-email-mchristi@redhat.com> In-Reply-To: <1511894441-8626-1-git-send-email-mchristi@redhat.com> References: <1511894441-8626-1-git-send-email-mchristi@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 28 Nov 2017 18:40:53 +0000 (UTC) Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP scatter_data_area always returns 0, so stop checking for errors. Signed-off-by: Mike Christie --- drivers/target/target_core_user.c | 31 +++++++------------------------ 1 file changed, 7 insertions(+), 24 deletions(-) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index c7541f0..965f462 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -520,7 +520,7 @@ static inline size_t iov_tail(struct iovec *iov) return (size_t)iov->iov_base + iov->iov_len; } -static int scatter_data_area(struct tcmu_dev *udev, +static void scatter_data_area(struct tcmu_dev *udev, struct tcmu_cmd *tcmu_cmd, struct scatterlist *data_sg, unsigned int data_nents, struct iovec **iov, int *iov_cnt, bool copy_data) @@ -573,8 +573,6 @@ static int scatter_data_area(struct tcmu_dev *udev, } if (to) kunmap_atomic(to); - - return 0; } static void gather_data_area(struct tcmu_dev *udev, struct tcmu_cmd *cmd, @@ -864,33 +862,18 @@ static int tcmu_setup_cmd_timer(struct tcmu_cmd *tcmu_cmd) iov_cnt = 0; copy_to_data_area = (se_cmd->data_direction == DMA_TO_DEVICE || se_cmd->se_cmd_flags & SCF_BIDI); - ret = scatter_data_area(udev, tcmu_cmd, se_cmd->t_data_sg, - se_cmd->t_data_nents, &iov, &iov_cnt, - copy_to_data_area); - if (ret) { - tcmu_cmd_free_data(tcmu_cmd, tcmu_cmd->dbi_cnt); - mutex_unlock(&udev->cmdr_lock); - - pr_err("tcmu: alloc and scatter data failed\n"); - return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - } + scatter_data_area(udev, tcmu_cmd, se_cmd->t_data_sg, + se_cmd->t_data_nents, &iov, &iov_cnt, + copy_to_data_area); entry->req.iov_cnt = iov_cnt; /* Handle BIDI commands */ iov_cnt = 0; if (se_cmd->se_cmd_flags & SCF_BIDI) { iov++; - ret = scatter_data_area(udev, tcmu_cmd, - se_cmd->t_bidi_data_sg, - se_cmd->t_bidi_data_nents, - &iov, &iov_cnt, false); - if (ret) { - tcmu_cmd_free_data(tcmu_cmd, tcmu_cmd->dbi_cnt); - mutex_unlock(&udev->cmdr_lock); - - pr_err("tcmu: alloc and scatter bidi data failed\n"); - return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - } + scatter_data_area(udev, tcmu_cmd, se_cmd->t_bidi_data_sg, + se_cmd->t_bidi_data_nents, &iov, &iov_cnt, + false); } entry->req.iov_bidi_cnt = iov_cnt;