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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 DD7B0C43331 for ; Tue, 24 Mar 2020 15:30:36 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5190A20774 for ; Tue, 24 Mar 2020 15:30:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="QugOLwrK" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5190A20774 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ZXBBWhJ3ZmuYlV833z+fdXZ2En2kSEJwOtWxi4Ars2Q=; b=QugOLwrKEN9/I9xg+O/ph5sisa j/0qZWqIQZcJy20unxfsNa8DanOl4bhGprQ2jPmaAgrhq/rjqrnC2XShyrKAY/6ECBMgVSO9saM5J E89OVakASvZaiy6yNEgi9aGq5rjUrSigVMqwt49GZCMs+K4aicPFMd5PYgVQtHwRTmwYxBGuOyCPN fOT47BXFkuoRlR7LPpw/9sKzOdNj+ul/DRm5ljzVIuWrXx8Hd+O+nMo1rmCnScX7nWCI3vFFKxT+0 rYYbaaOcHz2eQj3NKyfn7iFpgNoNNL31H/JCAhKWOGMQrTH+y0KyMvhyoaxX/x2LNcvYfeEwfdpsx fnOtB2Hw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGlVg-0005Mo-Da; Tue, 24 Mar 2020 15:30:32 +0000 Received: from mail-il-dmz.mellanox.com ([193.47.165.129] helo=mellanox.co.il) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGlV6-0003iq-PK for linux-nvme@lists.infradead.org; Tue, 24 Mar 2020 15:29:59 +0000 Received: from Internal Mail-Server by MTLPINE1 (envelope-from israelr@mellanox.com) with ESMTPS (AES256-SHA encrypted); 24 Mar 2020 17:29:47 +0200 Received: from rsws50.mtr.labs.mlnx (rsws50.mtr.labs.mlnx [10.209.40.61]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 02OFTkEQ013985; Tue, 24 Mar 2020 17:29:47 +0200 From: Israel Rukshin To: Linux-nvme , Sagi Grimberg , Christoph Hellwig Subject: [PATCH 6/7] nvme-rdma: Add warning on state change failure at nvme_rdma_setup_ctrl Date: Tue, 24 Mar 2020 17:29:44 +0200 Message-Id: <1585063785-14268-7-git-send-email-israelr@mellanox.com> X-Mailer: git-send-email 1.8.4.3 In-Reply-To: <1585063785-14268-1-git-send-email-israelr@mellanox.com> References: <1585063785-14268-1-git-send-email-israelr@mellanox.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200324_082957_218113_D6636516 X-CRM114-Status: UNSURE ( 9.63 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Shlomi Nimrodi , Israel Rukshin , Max Gurtovoy MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org The transition to LIVE state should not fail in case of a new controller. Moving to DELETING state before nvme_tcp_create_ctrl() allocates all the resources may leads to NULL dereference at teardown flow (e.g., IO tagset, admin_q, connect_q). Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy Reviewed-by: Christoph Hellwig --- drivers/nvme/host/rdma.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index c99a882..3ae3011 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1022,8 +1022,13 @@ static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl *ctrl, bool new) changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); if (!changed) { - /* state change failure is ok if we're in DELETING state */ + /* + * state change failure is ok if we're in DELETING state, + * unless we're during creation of a new controller to + * avoid races with teardown flow. + */ WARN_ON_ONCE(ctrl->ctrl.state != NVME_CTRL_DELETING); + WARN_ON_ONCE(new); ret = -EINVAL; goto destroy_io; } -- 1.8.3.1 _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme