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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 E5376C2BA83 for ; Fri, 14 Feb 2020 16:00:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB8FB2067D for ; Fri, 14 Feb 2020 16:00:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696051; bh=yDTaCK/ytGY8aZ97lgRFlGc4UE+I2EUoD7z51dMYExw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=w3UC2/8o9xerZknP2DbGCtr1MtWvvMGj+LhBEuw0JL4XxYWgN+w0iy0b48N1INLXa 3GABx3WGLHl7MAo15vpeFOuXNT2D6bP/tDnMmmWtnEB5cDBL9zDD74URtVL0746Yd5 k/EB5HzTw37o9N0kpHAJnIslIAjx18IA+bYnnz40= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389186AbgBNQAu (ORCPT ); Fri, 14 Feb 2020 11:00:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:45960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389141AbgBNQA0 (ORCPT ); Fri, 14 Feb 2020 11:00:26 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 0738D24689; Fri, 14 Feb 2020 16:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696025; bh=yDTaCK/ytGY8aZ97lgRFlGc4UE+I2EUoD7z51dMYExw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q4JaUh5QAx7LczYBLMKmXHXMNEhx2yO8qA6+Y86ca5FKz8lSm8qXjlrAWJGS/EynU SUhTl5h4ajdrYRx+C1rjQGA6XXd3JNiezEmBc3eQ+/64ySXyRI2ytAAAn2wkTmZT4F 1sYZVzTP1U+N6ihOfyTh7gntD4BzUtr7nNqWejYM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vadim Pasternak , Jiri Pirko , Ido Schimmel , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.5 540/542] mlxsw: core: Add validation of hardware device types for MGPIR register Date: Fri, 14 Feb 2020 10:48:52 -0500 Message-Id: <20200214154854.6746-540-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214154854.6746-1-sashal@kernel.org> References: <20200214154854.6746-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vadim Pasternak [ Upstream commit 36844c855b896f90bab51ccecf72940eb7e3cfe1 ] When reading the number of gearboxes from the hardware, the driver does not validate the returned 'device type' field. The driver can therefore wrongly assume that the queried devices are gearboxes. On Spectrum-3 systems that support different types of devices, this can prevent the driver from loading, as it will try to query the temperature sensors from devices which it assumes are gearboxes and in fact are not. For example: [ 218.129230] mlxsw_minimal 2-0048: Reg cmd access status failed (status=7(bad parameter)) [ 218.138282] mlxsw_minimal 2-0048: Reg cmd access failed (reg_id=900a(mtmp),type=write) [ 218.147131] mlxsw_minimal 2-0048: Failed to setup temp sensor number 256 [ 218.534480] mlxsw_minimal 2-0048: Fail to register core bus [ 218.540714] mlxsw_minimal: probe of 2-0048 failed with error -5 Fix this by validating the 'device type' field. Fixes: 2e265a8b6c094 ("mlxsw: core: Extend hwmon interface with inter-connect temperature attributes") Fixes: f14f4e621b1b4 ("mlxsw: core: Extend thermal core with per inter-connect device thermal zones") Signed-off-by: Vadim Pasternak Acked-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c | 6 ++++-- drivers/net/ethernet/mellanox/mlxsw/core_thermal.c | 8 ++++++-- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c index 9bf8da5f6dafc..3fe878d7c94cb 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c @@ -573,6 +573,7 @@ static int mlxsw_hwmon_module_init(struct mlxsw_hwmon *mlxsw_hwmon) static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon *mlxsw_hwmon) { + enum mlxsw_reg_mgpir_device_type device_type; int index, max_index, sensor_index; char mgpir_pl[MLXSW_REG_MGPIR_LEN]; char mtmp_pl[MLXSW_REG_MTMP_LEN]; @@ -584,8 +585,9 @@ static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon *mlxsw_hwmon) if (err) return err; - mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, NULL, NULL, NULL); - if (!gbox_num) + mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL); + if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE || + !gbox_num) return 0; index = mlxsw_hwmon->module_sensor_max; diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c index c721b171bd8de..ce0a6837daa32 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c @@ -895,8 +895,10 @@ static int mlxsw_thermal_gearboxes_init(struct device *dev, struct mlxsw_core *core, struct mlxsw_thermal *thermal) { + enum mlxsw_reg_mgpir_device_type device_type; struct mlxsw_thermal_module *gearbox_tz; char mgpir_pl[MLXSW_REG_MGPIR_LEN]; + u8 gbox_num; int i; int err; @@ -908,11 +910,13 @@ mlxsw_thermal_gearboxes_init(struct device *dev, struct mlxsw_core *core, if (err) return err; - mlxsw_reg_mgpir_unpack(mgpir_pl, &thermal->tz_gearbox_num, NULL, NULL, + mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL); - if (!thermal->tz_gearbox_num) + if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE || + !gbox_num) return 0; + thermal->tz_gearbox_num = gbox_num; thermal->tz_gearbox_arr = kcalloc(thermal->tz_gearbox_num, sizeof(*thermal->tz_gearbox_arr), GFP_KERNEL); -- 2.20.1