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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 1C616C4338F for ; Mon, 2 Aug 2021 09:14:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0C8C610CC for ; Mon, 2 Aug 2021 09:14:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233104AbhHBJO5 (ORCPT ); Mon, 2 Aug 2021 05:14:57 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:58796 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232936AbhHBJOc (ORCPT ); Mon, 2 Aug 2021 05:14:32 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id D599B1FF57; Mon, 2 Aug 2021 09:14:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1627895661; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZjJI5ui+lBKS/7eBpcH/R0Ll/x+qjOPveqmd5g+MLNM=; b=Pi8KRd3uR5Cnr+ySlH7qEC+QUhmfEriTe3+OdPTUOrmZgC3A1nsyedqMzvu78H4en5rYtP YvaT3UuDUzQ0Hdr9yfuhqrGxTB2TpdkP1udYwbJkRh2vwiUSlXHWrSkkTKEu4xLRMz6GgQ PJp0tiUTejJBVBDDd8Km7aGCOUQcOBU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1627895661; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZjJI5ui+lBKS/7eBpcH/R0Ll/x+qjOPveqmd5g+MLNM=; b=mLpbGKJ8qFNcjj8NkIEoUsMt1Bgb/UJWaCTa3cYTzvZr5i+0XU8ke2zH78q3aiRxofeha+ 6yTHg0sJ+N4towDg== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id 1C64FA3BB2; Mon, 2 Aug 2021 09:14:21 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 17828) id 0CC82518C08F; Mon, 2 Aug 2021 11:14:21 +0200 (CEST) From: Daniel Wagner To: linux-kernel@vger.kernel.org Cc: James Smart , Keith Busch , Ming Lei , Sagi Grimberg , Hannes Reinecke , Wen Xiong , Daniel Wagner , James Smart Subject: [PATCH v4 4/8] nvme-fc: Wait with a timeout for queue to freeze Date: Mon, 2 Aug 2021 11:14:15 +0200 Message-Id: <20210802091419.56425-5-dwagner@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210802091419.56425-1-dwagner@suse.de> References: <20210802091419.56425-1-dwagner@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Do not wait indifinitly for all queues to freeze. Instead use a timeout and abort the operation if we get stuck. Reviewed-by: James Smart Reviewed-by: Hannes Reinecke Signed-off-by: Daniel Wagner --- drivers/nvme/host/fc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 8a903769364f..dbb8ad816df8 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -2955,7 +2955,14 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl) dev_info(ctrl->ctrl.device, "reconnect: revising io queue count from %d to %d\n", prior_ioq_cnt, nr_io_queues); - nvme_wait_freeze(&ctrl->ctrl); + if (!nvme_wait_freeze_timeout(&ctrl->ctrl, NVME_IO_TIMEOUT)) { + /* + * If we timed out waiting for freeze we are likely to + * be stuck. Fail the controller initialization just + * to be safe. + */ + return -ENODEV; + } blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues); nvme_unfreeze(&ctrl->ctrl); } -- 2.29.2