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=-19.0 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,SPF_PASS, URIBL_BLOCKED,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 DC1EBC433C1 for ; Mon, 22 Mar 2021 13:15:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0E156191D for ; Mon, 22 Mar 2021 13:15:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232093AbhCVNOi (ORCPT ); Mon, 22 Mar 2021 09:14:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:51686 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233408AbhCVM6i (ORCPT ); Mon, 22 Mar 2021 08:58:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 83C4F61606; Mon, 22 Mar 2021 12:58:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1616417917; bh=MRVAajJWLq0Gdz9BGVqsOGXIdkzVvulwGASu4SLLVJQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ctopDL2gByyLoxW1orRplxohMlVW5Y1LV00tT32E2wu2vSH2eYXheqxu9CSvmoprJ 9ygHnWbszuWiDoBItmdm6zkdGO85tQhSiZRZr46T7V95O2sMaN+qvwgpLgL88cIq56 tvjzAVNYpOZHTwpvZRA56hW84Om8M9f6pvNAckKA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Belanger, Martin" , Sagi Grimberg , Chaitanya Kulkarni , Christoph Hellwig Subject: [PATCH 5.10 040/157] nvmet: dont check iosqes,iocqes for discovery controllers Date: Mon, 22 Mar 2021 13:26:37 +0100 Message-Id: <20210322121935.025948284@linuxfoundation.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210322121933.746237845@linuxfoundation.org> References: <20210322121933.746237845@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: Sagi Grimberg commit d218a8a3003e84ab136e69a4e30dd4ec7dab2d22 upstream. >>From the base spec, Figure 78: "Controller Configuration, these fields are defined as parameters to configure an "I/O Controller (IOC)" and not to configure a "Discovery Controller (DC). ... If the controller does not support I/O queues, then this field shall be read-only with a value of 0h Just perform this check for I/O controllers. Fixes: a07b4970f464 ("nvmet: add a generic NVMe target") Reported-by: Belanger, Martin Signed-off-by: Sagi Grimberg Reviewed-by: Chaitanya Kulkarni Signed-off-by: Christoph Hellwig Signed-off-by: Greg Kroah-Hartman --- drivers/nvme/target/core.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1109,9 +1109,20 @@ static void nvmet_start_ctrl(struct nvme { lockdep_assert_held(&ctrl->lock); - if (nvmet_cc_iosqes(ctrl->cc) != NVME_NVM_IOSQES || - nvmet_cc_iocqes(ctrl->cc) != NVME_NVM_IOCQES || - nvmet_cc_mps(ctrl->cc) != 0 || + /* + * Only I/O controllers should verify iosqes,iocqes. + * Strictly speaking, the spec says a discovery controller + * should verify iosqes,iocqes are zeroed, however that + * would break backwards compatibility, so don't enforce it. + */ + if (ctrl->subsys->type != NVME_NQN_DISC && + (nvmet_cc_iosqes(ctrl->cc) != NVME_NVM_IOSQES || + nvmet_cc_iocqes(ctrl->cc) != NVME_NVM_IOCQES)) { + ctrl->csts = NVME_CSTS_CFS; + return; + } + + if (nvmet_cc_mps(ctrl->cc) != 0 || nvmet_cc_ams(ctrl->cc) != 0 || nvmet_cc_css(ctrl->cc) != 0) { ctrl->csts = NVME_CSTS_CFS;