Return-Path: <linux-kernel-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id E4744C433F5
	for <linux-kernel@archiver.kernel.org>; Mon, 10 Jan 2022 07:30:38 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S240352AbiAJH3z (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Mon, 10 Jan 2022 02:29:55 -0500
Received: from ams.source.kernel.org ([145.40.68.75]:57246 "EHLO
        ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S239761AbiAJH0q (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 10 Jan 2022 02:26:46 -0500
Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140])
        (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
        (No client certificate requested)
        by ams.source.kernel.org (Postfix) with ESMTPS id CAD3AB8121F;
        Mon, 10 Jan 2022 07:26:43 +0000 (UTC)
Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F612C36AED;
        Mon, 10 Jan 2022 07:26:41 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org;
        s=korg; t=1641799602;
        bh=Wldz8UjcKZnAtHovDBU/1qsaosdEB3xAIvPbnIahNks=;
        h=From:To:Cc:Subject:Date:In-Reply-To:References:From;
        b=fNiDRLcP+npnyiVjczWXf7RAJnYUUcOThu19Nj7rQNZ9me7FWWw0wpWzTgoqy1dwS
         yIvW0KWx7GoIkHzFcwc2YXSgQ0wXboeDW2rz+LWzV7CcvFEMwHAjH2p5zD3+vMmQIa
         MvoN3cLiuqNchJkiMAdH2BB6fPs76p+LDD52I0JI=
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Lukasz Cieplicki <lukaszx.cieplicki@intel.com>,
        Jedrzej Jagielski <jedrzej.jagielski@intel.com>,
        Gurucharan G <gurucharanx.g@intel.com>,
        Tony Nguyen <anthony.l.nguyen@intel.com>
Subject: [PATCH 4.14 09/22] i40e: Fix incorrect netdevs real number of RX/TX queues
Date:   Mon, 10 Jan 2022 08:23:02 +0100
Message-Id: <20220110071814.574227520@linuxfoundation.org>
X-Mailer: git-send-email 2.34.1
In-Reply-To: <20220110071814.261471354@linuxfoundation.org>
References: <20220110071814.261471354@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: Jedrzej Jagielski <jedrzej.jagielski@intel.com>

commit e738451d78b2f8a9635d66c6a87f304b4d965f7a upstream.

There was a wrong queues representation in sysfs during
driver's reinitialization in case of online cpus number is
less than combined queues. It was caused by stopped
NetworkManager, which is responsible for calling vsi_open
function during driver's initialization.
In specific situation (ex. 12 cpus online) there were 16 queues
in /sys/class/net/<iface>/queues. In case of modifying queues with
value higher, than number of online cpus, then it caused write
errors and other errors.
Add updating of sysfs's queues representation during driver
initialization.

Fixes: 41c445ff0f48 ("i40e: main driver core")
Signed-off-by: Lukasz Cieplicki <lukaszx.cieplicki@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |   32 +++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -5730,6 +5730,27 @@ int i40e_open(struct net_device *netdev)
 }
 
 /**
+ * i40e_netif_set_realnum_tx_rx_queues - Update number of tx/rx queues
+ * @vsi: vsi structure
+ *
+ * This updates netdev's number of tx/rx queues
+ *
+ * Returns status of setting tx/rx queues
+ **/
+static int i40e_netif_set_realnum_tx_rx_queues(struct i40e_vsi *vsi)
+{
+	int ret;
+
+	ret = netif_set_real_num_rx_queues(vsi->netdev,
+					   vsi->num_queue_pairs);
+	if (ret)
+		return ret;
+
+	return netif_set_real_num_tx_queues(vsi->netdev,
+					    vsi->num_queue_pairs);
+}
+
+/**
  * i40e_vsi_open -
  * @vsi: the VSI to open
  *
@@ -5765,13 +5786,7 @@ int i40e_vsi_open(struct i40e_vsi *vsi)
 			goto err_setup_rx;
 
 		/* Notify the stack of the actual queue counts. */
-		err = netif_set_real_num_tx_queues(vsi->netdev,
-						   vsi->num_queue_pairs);
-		if (err)
-			goto err_set_queues;
-
-		err = netif_set_real_num_rx_queues(vsi->netdev,
-						   vsi->num_queue_pairs);
+		err = i40e_netif_set_realnum_tx_rx_queues(vsi);
 		if (err)
 			goto err_set_queues;
 
@@ -10455,6 +10470,9 @@ struct i40e_vsi *i40e_vsi_setup(struct i
 		ret = i40e_config_netdev(vsi);
 		if (ret)
 			goto err_netdev;
+		ret = i40e_netif_set_realnum_tx_rx_queues(vsi);
+		if (ret)
+			goto err_netdev;
 		ret = register_netdev(vsi->netdev);
 		if (ret)
 			goto err_netdev;