From patchwork Wed May 13 09:44:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 225910 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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 437A3CA90AF for ; Wed, 13 May 2020 10:05:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2351420575 for ; Wed, 13 May 2020 10:05:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589364342; bh=jpdaPpHao6OeULRHplp+4KkK02unGY3r6eZUySCwHaM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ayieCzv0IWRPJ7JVwUluBmA8QqvHtl7rM/CGmMvdvQjvH1fJWp5THmNXG6G+O1JlK ZLmdkHVI02X0o9iJXapLCCIhj2CKOG2MZZGZ47J/Ft2Q+4ky8RQ6Yb0I/v+a2n6sRE OkJtkSWHndOYhWJ3M9lKFvb6VsestOtKtRapgCLU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732581AbgEMJqK (ORCPT ); Wed, 13 May 2020 05:46:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:43452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726492AbgEMJqJ (ORCPT ); Wed, 13 May 2020 05:46:09 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 67F8020740; Wed, 13 May 2020 09:46:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363168; bh=jpdaPpHao6OeULRHplp+4KkK02unGY3r6eZUySCwHaM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WoWofrOCEaxW0E7UULadyUuknM/4CGjZ2nQjMObusz0is/FXaY8Q0VGG/oe0eK3kj u3EUgCmBjI3mtrE9QXrOC7U0WvD+PEjoUiGxO0k+CxyTudgV79fYsE4WI1dwQlC8sr 7+fiSXfy9q7GviOhSifCzEa4OSGVuYTqrohcW1m0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Moshe Shemesh , Eran Ben Elisha , Saeed Mahameed Subject: [PATCH 4.19 14/48] net/mlx5: Fix forced completion access non initialized command entry Date: Wed, 13 May 2020 11:44:40 +0200 Message-Id: <20200513094354.999572106@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513094351.100352960@linuxfoundation.org> References: <20200513094351.100352960@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Moshe Shemesh [ Upstream commit f3cb3cebe26ed4c8036adbd9448b372129d3c371 ] mlx5_cmd_flush() will trigger forced completions to all valid command entries. Triggered by an asynch event such as fast teardown it can happen at any stage of the command, including command initialization. It will trigger forced completion and that can lead to completion on an uninitialized command entry. Setting MLX5_CMD_ENT_STATE_PENDING_COMP only after command entry is initialized will ensure force completion is treated only if command entry is initialized. Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots") Signed-off-by: Moshe Shemesh Signed-off-by: Eran Ben Elisha Signed-off-by: Saeed Mahameed Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -862,7 +862,6 @@ static void cmd_work_handler(struct work } cmd->ent_arr[ent->idx] = ent; - set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state); lay = get_inst(cmd, ent->idx); ent->lay = lay; memset(lay, 0, sizeof(*lay)); @@ -884,6 +883,7 @@ static void cmd_work_handler(struct work if (ent->callback) schedule_delayed_work(&ent->cb_timeout_work, cb_timeout); + set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state); /* Skip sending command to fw if internal error */ if (pci_channel_offline(dev->pdev) ||