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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 8EC5BC433F4 for ; Mon, 24 Sep 2018 12:34:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5583F21486 for ; Mon, 24 Sep 2018 12:34:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5583F21486 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388321AbeIXSgW (ORCPT ); Mon, 24 Sep 2018 14:36:22 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:58426 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729816AbeIXSgW (ORCPT ); Mon, 24 Sep 2018 14:36:22 -0400 Received: from localhost (ip-213-127-77-73.ip.prioritytelecom.net [213.127.77.73]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id CE6471018; Mon, 24 Sep 2018 12:34:25 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julian Wiedmann , "David S. Miller" , Sasha Levin Subject: [PATCH 4.18 083/235] s390/qeth: reset layer2 attribute on layer switch Date: Mon, 24 Sep 2018 13:51:09 +0200 Message-Id: <20180924113113.328667386@linuxfoundation.org> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180924113103.999624566@linuxfoundation.org> References: <20180924113103.999624566@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Julian Wiedmann [ Upstream commit 70551dc46ffa3555a0b5f3545b0cd87ab67fd002 ] After the subdriver's remove() routine has completed, the card's layer mode is undetermined again. Reflect this in the layer2 field. If qeth_dev_layer2_store() hits an error after remove() was called, the card _always_ requires a setup(), even if the previous layer mode is requested again. But qeth_dev_layer2_store() bails out early if the requested layer mode still matches the current one. So unless we reset the layer2 field, re-probing the card back to its previous mode is currently not possible. Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/s390/net/qeth_core_sys.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/s390/net/qeth_core_sys.c +++ b/drivers/s390/net/qeth_core_sys.c @@ -426,6 +426,7 @@ static ssize_t qeth_dev_layer2_store(str if (card->discipline) { card->discipline->remove(card->gdev); qeth_core_free_discipline(card); + card->options.layer2 = -1; } rc = qeth_core_load_discipline(card, newdis);