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 43FA0C433E4 for ; Thu, 14 May 2020 19:11:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1FCB9206F1 for ; Thu, 14 May 2020 19:11:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589483499; bh=YI+9V7nau8O3qGjdI0S6gJb+jAvnb6N82/kQ5n1bFtg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TMn6wZVsfx5z1H0X9Ifr4BzbRkigNh5gNhzXWw4seS/8dcUnhMwaw6Ds/WCqIJLsX +7aILX64n53PWi/kuOnpvijdOBj7km9apP0EAVOw0JMUJkvTaOAuao9niO/AtW80H5 GS8JRHdHSGqUmuaOaXH3vbhhzcgyYsLph3znWKEg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730353AbgENTLh (ORCPT ); Thu, 14 May 2020 15:11:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:50310 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728240AbgENSwQ (ORCPT ); Thu, 14 May 2020 14:52:16 -0400 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 B526620675; Thu, 14 May 2020 18:52:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589482335; bh=YI+9V7nau8O3qGjdI0S6gJb+jAvnb6N82/kQ5n1bFtg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1omJXutsLfT85/4XI0o0UbLxCLua+U7eK8oEB4HOAOFdFVgd0XCjo5TG3O7+DQ5Xn ZArxj8IO9Kka+fpyAWj4VK6eUkVkKpLvUSM70Glr3LwMDFdnMms2twhqm0YXQaKE7b +0jKGu+PlKCF1k8B8M9IHaMuzxpEv69gbbF8O08Q= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Juliet Kim , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.6 21/62] ibmvnic: Skip fatal error reset after passive init Date: Thu, 14 May 2020 14:51:06 -0400 Message-Id: <20200514185147.19716-21-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200514185147.19716-1-sashal@kernel.org> References: <20200514185147.19716-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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: Juliet Kim [ Upstream commit f9c6cea0b38518741c8dcf26ac056d26ee2fd61d ] During MTU change, the following events may happen. Client-driven CRQ initialization fails due to partner’s CRQ closed, causing client to enqueue a reset task for FATAL_ERROR. Then passive (server-driven) CRQ initialization succeeds, causing client to release CRQ and enqueue a reset task for failover. If the passive CRQ initialization occurs before the FATAL reset task is processed, the FATAL error reset task would try to access a CRQ message queue that was freed, causing an oops. The problem may be most likely to occur during DLPAR add vNIC with a non-default MTU, because the DLPAR process will automatically issue a change MTU request. Fix this by not processing fatal error reset if CRQ is passively initialized after client-driven CRQ initialization fails. Signed-off-by: Juliet Kim Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/ibm/ibmvnic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 4bd33245bad62..3de549c6c6930 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2189,7 +2189,8 @@ static void __ibmvnic_reset(struct work_struct *work) rc = do_hard_reset(adapter, rwi, reset_state); rtnl_unlock(); } - } else { + } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && + adapter->from_passive_init)) { rc = do_reset(adapter, rwi, reset_state); } kfree(rwi); -- 2.20.1