From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753607AbcHHTQZ (ORCPT ); Mon, 8 Aug 2016 15:16:25 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:35976 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752884AbcHHTQS (ORCPT ); Mon, 8 Aug 2016 15:16:18 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ursula Braun , Alexander Klein , "David S. Miller" Subject: [PATCH 4.4 46/68] qeth: delete napi struct when removing a qeth device Date: Mon, 8 Aug 2016 21:11:21 +0200 Message-Id: <20160808180211.842527622@linuxfoundation.org> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20160808180209.697765393@linuxfoundation.org> References: <20160808180209.697765393@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ursula Braun commit 7831b4ff0d926e0deeaabef9db8800ed069a2757 upstream. A qeth_card contains a napi_struct linked to the net_device during device probing. This struct must be deleted when removing the qeth device, otherwise Panic on oops can occur when qeth devices are repeatedly removed and added. Fixes: a1c3ed4c9ca ("qeth: NAPI support for l2 and l3 discipline") Signed-off-by: Ursula Braun Tested-by: Alexander Klein Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/s390/net/qeth_l2_main.c | 1 + drivers/s390/net/qeth_l3_main.c | 1 + 2 files changed, 2 insertions(+) --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1051,6 +1051,7 @@ static void qeth_l2_remove_device(struct qeth_l2_set_offline(cgdev); if (card->dev) { + netif_napi_del(&card->napi); unregister_netdev(card->dev); card->dev = NULL; } --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -3246,6 +3246,7 @@ static void qeth_l3_remove_device(struct qeth_l3_set_offline(cgdev); if (card->dev) { + netif_napi_del(&card->napi); unregister_netdev(card->dev); card->dev = NULL; }