From patchwork Tue Oct 22 17:35:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavan Kumar Linga X-Patchwork-Id: 13845999 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3BC021BD4E7; Tue, 22 Oct 2024 17:37:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729618657; cv=none; b=AbZVDqgZ/acvn7H82VNftMXgt50WUWJ74pwUD40Jt2P0PK9q3OgYxdP7K8ihWLEFrIcOx6smF5JS/HndDpYra/UQLtcHAT330jNJy4Wy5lDVCKyf9+DLPnygwj3f6MHzTl8XFxeLvI4gk/vQ/fw+K5G8lUnpm735Otiec5AQKpc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729618657; c=relaxed/simple; bh=fnA0+V9d6R0QH4pHuCxe4JCw3zsvVsBfrNKGuSh+9/Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uWQJ2xFf9m0zZxP5xXrN5JWaX4zr8lKk9gFVdMIMCHAFsm1TzpHSndP/VOcUcHp6qsnhCvDY5LDh+kS7IWRSSXxdAePcQSzxSW9qhouIOcECTwRlsnpuLFg5AK+s9C+m6uRu/CbD3Kq0/jWP1DktFPCTvV9gMi76XhYQx8EAYZg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Wm1vLCmr; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Wm1vLCmr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729618656; x=1761154656; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=fnA0+V9d6R0QH4pHuCxe4JCw3zsvVsBfrNKGuSh+9/Y=; b=Wm1vLCmrrHAQ0bJMsIsvE24qjrV+7Ozo9LGvzI60IHo/5J/MEtXixsWz d//qI+EDPKrAfqC6ihsUbXsyU8nT3JoLNrkuvnaY4B8xf8MXQmone/a0l TD5bX+KcVq5aKfwA9jHlvD+zAYLWt2ZyJnykND7h1IyTKwugAwAhWVY7f wtdR+6F16y2kBSepUTJH7WjuEmZW5KezvOHamU97sm4U6MxXSfXU3SnKN 6CIjopiGzsV3idr9j6NhvVm6VrLmHZGal8Rz3ekBTJWMiioAu0eUQm7CP Z9Fmq3+PakibpX/thQjUVrr8fb+junXuxFZlmR3UGgfd+Icl4Wf8VcvZD Q==; X-CSE-ConnectionGUID: 2cPNw1vBS8ux9WqFFlkYVw== X-CSE-MsgGUID: 3fTkzv1OSBquBRsKKuwEAg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="39721922" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="39721922" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Oct 2024 10:37:27 -0700 X-CSE-ConnectionGUID: EjMAnx/CTxencw981mV+xg== X-CSE-MsgGUID: XmWVteK0SJ2dGP+9idCsgg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,223,1725346800"; d="scan'208";a="79862537" Received: from unknown (HELO localhost.jf.intel.com) ([10.166.80.24]) by orviesa009.jf.intel.com with ESMTP; 22 Oct 2024 10:37:27 -0700 From: Pavan Kumar Linga To: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org, Pavan Kumar Linga , stable@vger.kernel.org, Tarun K Singh Subject: [PATCH iwl-net 1/2] idpf: avoid vport access in idpf_get_link_ksettings Date: Tue, 22 Oct 2024 10:35:26 -0700 Message-ID: <20241022173527.87972-2-pavan.kumar.linga@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241022173527.87972-1-pavan.kumar.linga@intel.com> References: <20241022173527.87972-1-pavan.kumar.linga@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org When the device control plane is removed or the platform running device control plane is rebooted, a reset is detected on the driver. On driver reset, it releases the resources and waits for the reset to complete. If the reset fails, it takes the error path and releases the vport lock. At this time if the monitoring tools tries to access link settings, it call traces for accessing released vport pointer. To avoid it, move link_speed_mbps to netdev_priv structure which removes the dependency on vport pointer and the vport lock in idpf_get_link_ksettings. Also use netif_carrier_ok() to check the link status and adjust the offsetof to use link_up instead of link_speed_mbps. Fixes: 02cbfba1add5 ("idpf: add ethtool callbacks") Cc: stable@vger.kernel.org # 6.7+ Reviewed-by: Tarun K Singh Signed-off-by: Pavan Kumar Linga --- drivers/net/ethernet/intel/idpf/idpf.h | 4 ++-- drivers/net/ethernet/intel/idpf/idpf_ethtool.c | 11 +++-------- drivers/net/ethernet/intel/idpf/idpf_lib.c | 4 ++-- drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 2 +- 4 files changed, 8 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/intel/idpf/idpf.h b/drivers/net/ethernet/intel/idpf/idpf.h index 2c31ad87587a..66544faab710 100644 --- a/drivers/net/ethernet/intel/idpf/idpf.h +++ b/drivers/net/ethernet/intel/idpf/idpf.h @@ -141,6 +141,7 @@ enum idpf_vport_state { * @adapter: Adapter back pointer * @vport: Vport back pointer * @vport_id: Vport identifier + * @link_speed_mbps: Link speed in mbps * @vport_idx: Relative vport index * @state: See enum idpf_vport_state * @netstats: Packet and byte stats @@ -150,6 +151,7 @@ struct idpf_netdev_priv { struct idpf_adapter *adapter; struct idpf_vport *vport; u32 vport_id; + u32 link_speed_mbps; u16 vport_idx; enum idpf_vport_state state; struct rtnl_link_stats64 netstats; @@ -287,7 +289,6 @@ struct idpf_port_stats { * @tx_itr_profile: TX profiles for Dynamic Interrupt Moderation * @port_stats: per port csum, header split, and other offload stats * @link_up: True if link is up - * @link_speed_mbps: Link speed in mbps * @sw_marker_wq: workqueue for marker packets */ struct idpf_vport { @@ -331,7 +332,6 @@ struct idpf_vport { struct idpf_port_stats port_stats; bool link_up; - u32 link_speed_mbps; wait_queue_head_t sw_marker_wq; }; diff --git a/drivers/net/ethernet/intel/idpf/idpf_ethtool.c b/drivers/net/ethernet/intel/idpf/idpf_ethtool.c index 3806ddd3ce4a..59b1a1a09996 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_ethtool.c +++ b/drivers/net/ethernet/intel/idpf/idpf_ethtool.c @@ -1296,24 +1296,19 @@ static void idpf_set_msglevel(struct net_device *netdev, u32 data) static int idpf_get_link_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *cmd) { - struct idpf_vport *vport; - - idpf_vport_ctrl_lock(netdev); - vport = idpf_netdev_to_vport(netdev); + struct idpf_netdev_priv *np = netdev_priv(netdev); ethtool_link_ksettings_zero_link_mode(cmd, supported); cmd->base.autoneg = AUTONEG_DISABLE; cmd->base.port = PORT_NONE; - if (vport->link_up) { + if (netif_carrier_ok(netdev)) { cmd->base.duplex = DUPLEX_FULL; - cmd->base.speed = vport->link_speed_mbps; + cmd->base.speed = np->link_speed_mbps; } else { cmd->base.duplex = DUPLEX_UNKNOWN; cmd->base.speed = SPEED_UNKNOWN; } - idpf_vport_ctrl_unlock(netdev); - return 0; } diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c index 4f20343e49a9..c3848e10e7db 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_lib.c +++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c @@ -1860,7 +1860,7 @@ int idpf_initiate_soft_reset(struct idpf_vport *vport, * mess with. Nothing below should use those variables from new_vport * and should instead always refer to them in vport if they need to. */ - memcpy(new_vport, vport, offsetof(struct idpf_vport, link_speed_mbps)); + memcpy(new_vport, vport, offsetof(struct idpf_vport, link_up)); /* Adjust resource parameters prior to reallocating resources */ switch (reset_cause) { @@ -1906,7 +1906,7 @@ int idpf_initiate_soft_reset(struct idpf_vport *vport, /* Same comment as above regarding avoiding copying the wait_queues and * mutexes applies here. We do not want to mess with those if possible. */ - memcpy(vport, new_vport, offsetof(struct idpf_vport, link_speed_mbps)); + memcpy(vport, new_vport, offsetof(struct idpf_vport, link_up)); if (reset_cause == IDPF_SR_Q_CHANGE) idpf_vport_alloc_vec_indexes(vport); diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c index 70986e12da28..3be883726b87 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c +++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c @@ -141,7 +141,7 @@ static void idpf_handle_event_link(struct idpf_adapter *adapter, } np = netdev_priv(vport->netdev); - vport->link_speed_mbps = le32_to_cpu(v2e->link_speed); + np->link_speed_mbps = le32_to_cpu(v2e->link_speed); if (vport->link_up == v2e->link_status) return;