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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 1FCE5C433F4 for ; Thu, 30 Aug 2018 11:50:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D761620835 for ; Thu, 30 Aug 2018 11:50:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D761620835 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=microchip.com 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 S1728779AbeH3Pwc (ORCPT ); Thu, 30 Aug 2018 11:52:32 -0400 Received: from esa4.microchip.iphmx.com ([68.232.154.123]:41756 "EHLO esa4.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728094AbeH3Pwb (ORCPT ); Thu, 30 Aug 2018 11:52:31 -0400 X-IronPort-AV: E=Sophos;i="5.53,306,1531810800"; d="scan'208";a="18692646" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 30 Aug 2018 04:50:45 -0700 Received: from m18063-ThinkPad-T460p.mchp-main.com (10.10.76.4) by chn-sv-exch05.mchp-main.com (10.10.76.106) with Microsoft SMTP Server id 14.3.352.0; Thu, 30 Aug 2018 04:50:45 -0700 From: Claudiu Beznea To: , , , CC: , , , Claudiu Beznea Subject: [PATCH 6/6] power: reset: at91-poweroff: do not procede if at91_shdwc is allocated Date: Thu, 30 Aug 2018 14:50:11 +0300 Message-ID: <1535629811-13403-7-git-send-email-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1535629811-13403-1-git-send-email-claudiu.beznea@microchip.com> References: <1535629811-13403-1-git-send-email-claudiu.beznea@microchip.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There should be only one instance of struct shdwc in the system. This is referenced through at91_shdwc. Return in probe if at91_shdwc is already allocated. Signed-off-by: Claudiu Beznea --- drivers/power/reset/at91-sama5d2_shdwc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c index ad6e2796690a..2b686c55b717 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -255,6 +255,9 @@ static int __init at91_shdwc_probe(struct platform_device *pdev) if (!pdev->dev.of_node) return -ENODEV; + if (at91_shdwc) + return -EBUSY; + at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL); if (!at91_shdwc) return -ENOMEM; -- 2.7.4