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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 8C2B3C67863 for ; Mon, 22 Oct 2018 09:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 424772083A for ; Mon, 22 Oct 2018 09:36:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 424772083A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au 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 S1728320AbeJVRyB (ORCPT ); Mon, 22 Oct 2018 13:54:01 -0400 Received: from ozlabs.org ([203.11.71.1]:32773 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727519AbeJVRyB (ORCPT ); Mon, 22 Oct 2018 13:54:01 -0400 Received: by ozlabs.org (Postfix, from userid 1034) id 42drxV6k8jz9sDF; Mon, 22 Oct 2018 20:36:14 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 6beb3381b12793726783a5e9428250743659c6cf In-Reply-To: To: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras From: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: powerpc/sysdev/ipic: check primary_ipic NULL pointer before using it Message-Id: <42drxV6k8jz9sDF@ozlabs.org> Date: Mon, 22 Oct 2018 20:36:13 +1100 (AEDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2018-08-27 at 08:27:27 UTC, Christophe Leroy wrote: > ipic_get_mcp_status() is used by targets implementing NMI > watchdog in target specific machine check handler in order > to known whether a machine check results from a watchdog > NMI reset. > > In case of very early machine check, primary_ipic pointer > might not have been set yet, so ipic_get_mcp_status() needs > to check it for nullity before using it. > > Signed-off-by: Christophe Leroy Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/6beb3381b12793726783a5e9428250 cheers