From patchwork Thu Nov 29 06:03:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 10703977 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6729014BD for ; Thu, 29 Nov 2018 06:08:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5A9BB292A7 for ; Thu, 29 Nov 2018 06:08:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4F1B82E764; Thu, 29 Nov 2018 06:08:08 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,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 E7089292A7 for ; Thu, 29 Nov 2018 06:08:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730080AbeK2RI2 (ORCPT ); Thu, 29 Nov 2018 12:08:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:47302 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728038AbeK2RI1 (ORCPT ); Thu, 29 Nov 2018 12:08:27 -0500 Received: from sasha-vm.mshome.net (unknown [37.142.5.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E675620834; Thu, 29 Nov 2018 06:04:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543471455; bh=bXYOK/jxQwRRNUSJM5SPuyg1O5d7sfQwm7eXsSwxbuQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SVM7aUgddBes/i5kgyeJ6TzP3EO4d3SIU1ljYB4XBwjrBB8Gl+FCgqndHzzmAE3yi J+vUMvdlbHtmffyykXvSFa36Jai9vxiw5oW3QHgkv05Gxcs/ffNTzreIicSicxTZBP yJzE2vtuHuFlqFngspSdxBViPBoA5at2qHOwePVo= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jack Morgenstein , Tariq Toukan , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 11/18] net/mlx4_core: Zero out lkey field in SW2HW_MPT fw command Date: Thu, 29 Nov 2018 01:03:23 -0500 Message-Id: <20181129060331.160224-11-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181129060331.160224-1-sashal@kernel.org> References: <20181129060331.160224-1-sashal@kernel.org> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jack Morgenstein [ Upstream commit bd85fbc2038a1bbe84990b23ff69b6fc81a32b2c ] When re-registering a user mr, the mpt information for the existing mr when running SRIOV is obtained via the QUERY_MPT fw command. The returned information includes the mpt's lkey. This retrieved mpt information is used to move the mpt back to hardware ownership in the rereg flow (via the SW2HW_MPT fw command when running SRIOV). The fw API spec states that for SW2HW_MPT, the lkey field must be zero. Any ConnectX-3 PF driver which checks for strict spec adherence will return failure for SW2HW_MPT if the lkey field is not zero (although the fw in practice ignores this field for SW2HW_MPT). Thus, in order to conform to the fw API spec, set the lkey field to zero before invoking SW2HW_MPT when running SRIOV. Fixes: e630664c8383 ("mlx4_core: Add helper functions to support MR re-registration") Signed-off-by: Jack Morgenstein Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlx4/mr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c index 395b5463cfd9..3637474cab8a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mr.c +++ b/drivers/net/ethernet/mellanox/mlx4/mr.c @@ -366,6 +366,7 @@ int mlx4_mr_hw_write_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr, container_of((void *)mpt_entry, struct mlx4_cmd_mailbox, buf); + (*mpt_entry)->lkey = 0; err = mlx4_SW2HW_MPT(dev, mailbox, key); }