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=-10.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 A4CE3C43387 for ; Mon, 7 Jan 2019 12:41:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 75A05218A1 for ; Mon, 7 Jan 2019 12:41:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1546864910; bh=w1Q66dL58vwzmEAg8ABXCdvTXn+CbWnPi3KzxrizQI8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AVwdIH4qxLztdN53pAO8M4sSfzGscJfSliqP34vWRwWFpdvehaR3ZaZJf9H3RFpCX EPHJixwPgiHnPrckSiVpvYBkuU/Hlhr55LVrjWG7HiZo1xtvqFTZu2MKG+kShe5jX1 bRqsShoRNMJERNUUjvZUIdgIu035Ua3JTfbi4Gik= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728191AbfAGMlt (ORCPT ); Mon, 7 Jan 2019 07:41:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:57198 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726879AbfAGMlr (ORCPT ); Mon, 7 Jan 2019 07:41:47 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C71CD21855; Mon, 7 Jan 2019 12:41:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1546864907; bh=w1Q66dL58vwzmEAg8ABXCdvTXn+CbWnPi3KzxrizQI8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VKPoqSvdPeZuzdJHBWCZTyqKa/GAi7OpbkS2N4OTzK7+iDWee7YYBDHzxD2nEvi6Y 4AZcd35rhVGBRs5nPeKyTyp7zGiDmIanHmmR5MD49mbd3weMF3eq2kfwrfEAnmybv+ zO1mx3GKdIhFkPjbb9W2lmoLCm0C2OUQPCNoD0wU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sebastian Ott , Martin Schwidefsky Subject: [PATCH 4.20 051/145] s390/pci: fix sleeping in atomic during hotplug Date: Mon, 7 Jan 2019 13:31:28 +0100 Message-Id: <20190107104444.058389216@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190107104437.308206189@linuxfoundation.org> References: <20190107104437.308206189@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sebastian Ott commit 98dfd32620e970eb576ebce5ea39d905cb005e72 upstream. When triggered by pci hotplug (PEC 0x306) clp_get_state is called with spinlocks held resulting in the following warning: zpci: n/a: Event 0x306 reconfigured PCI function 0x0 BUG: sleeping function called from invalid context at mm/page_alloc.c:4324 in_atomic(): 1, irqs_disabled(): 0, pid: 98, name: kmcheck 2 locks held by kmcheck/98: Change the allocation to use GFP_ATOMIC. Cc: stable@vger.kernel.org # 4.13+ Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/pci/pci_clp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -436,7 +436,7 @@ int clp_get_state(u32 fid, enum zpci_sta struct clp_state_data sd = {fid, ZPCI_FN_STATE_RESERVED}; int rc; - rrb = clp_alloc_block(GFP_KERNEL); + rrb = clp_alloc_block(GFP_ATOMIC); if (!rrb) return -ENOMEM;