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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 A18A5C433E1 for ; Fri, 24 Jul 2020 17:25:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7CE982070B for ; Fri, 24 Jul 2020 17:25:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="saPSIzft" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727845AbgGXRZb (ORCPT ); Fri, 24 Jul 2020 13:25:31 -0400 Received: from ale.deltatee.com ([204.191.154.188]:58576 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726512AbgGXRZ2 (ORCPT ); Fri, 24 Jul 2020 13:25:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=2UfxIISUaPeKQG++CK8g3xGqVmbeNNUeZkMHeeWJQ1w=; b=saPSIzftg6ezGmgLjTkCLiv+Ii Y7bozgRTJikeP4c0oDmcT01NQYyTCUZLTYCwzwhq86ooCZlZsA+d9bZ7mp4dES09I/8dGPRKQxLh2 4fSEFPbQLLYQcuS6vtb3vQFNM5hBFtREEmZFTg0EelhRJLIYEzHxbhX8e60X92GMvV5J32gN+jWXl /05eqql1qgRmiWNvqRa7oEIjRtZ5e9tAHoczSiu1u4OLMpndSsDkqo8p9QbVkq4LmY4j00L1VPBJ8 eEdDUQ+KfkstrkMGBR/HJEasXMYWTGp7kQrl52VfgTDjnZiQpZVtJ0YM068/0sOH7k56gfvnYyOR5 WzP6n4TA==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jz1Rk-0006yn-5m; Fri, 24 Jul 2020 11:25:28 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1jz1Rh-0004G6-VE; Fri, 24 Jul 2020 11:25:22 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org Cc: Christoph Hellwig , Sagi Grimberg , Keith Busch , Jens Axboe , Chaitanya Kulkarni , Max Gurtovoy , Stephen Bates , Logan Gunthorpe Date: Fri, 24 Jul 2020 11:25:12 -0600 Message-Id: <20200724172520.16318-2-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200724172520.16318-1-logang@deltatee.com> References: <20200724172520.16318-1-logang@deltatee.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, hch@lst.de, sagi@grimberg.me, kbusch@kernel.org, axboe@fb.com, Chaitanya.Kulkarni@wdc.com, maxg@mellanox.com, sbates@raithlin.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v16 1/9] nvme-core: Clear any SGL flags in passthru commands X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The host driver should decide whether to use SGLs or PRPs and they currently assume the flags are cleared after the call to nvme_setup_cmd(). However, passed-through commands may erroneously set these bits; so clear them for all cases. Signed-off-by: Logan Gunthorpe Reviewed-by: Sagi Grimberg --- drivers/nvme/host/core.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 1d7c7afb1348..6f80bd78eba6 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -593,6 +593,14 @@ static void nvme_assign_write_stream(struct nvme_ctrl *ctrl, req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9; } +static void nvme_setup_passthrough(struct request *req, + struct nvme_command *cmd) +{ + memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); + /* passthru commands should let the driver set the SGL flags */ + cmd->common.flags &= ~NVME_CMD_SGL_ALL; +} + static inline void nvme_setup_flush(struct nvme_ns *ns, struct nvme_command *cmnd) { @@ -758,7 +766,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, switch (req_op(req)) { case REQ_OP_DRV_IN: case REQ_OP_DRV_OUT: - memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); + nvme_setup_passthrough(req, cmd); break; case REQ_OP_FLUSH: nvme_setup_flush(ns, cmd); -- 2.20.1