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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 C5194C43215 for ; Tue, 19 Nov 2019 05:36:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D34B20672 for ; Tue, 19 Nov 2019 05:36:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574141773; bh=8C77Ah9eGNmpKFrXn+KY6E4yKZ1R8Yn9FxFLckt44Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WT913K6j4QZ6RxcurYYu6PAzIGtXiJ0KJurgOy8LJE/mHEGqm9LldLR7rCSZrEQux GFdoPULzVbjmaO8oOVKreORsHefQ7PNyUl+6/dvfhQNIIJ90wvGI8BjVkDNnyU9qw1 t86jLHSDI8ugJN4kF1z7NOlKwPMH94AYs4l+3QSU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729924AbfKSFgM (ORCPT ); Tue, 19 Nov 2019 00:36:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:57288 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728141AbfKSFgJ (ORCPT ); Tue, 19 Nov 2019 00:36:09 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 5015D20862; Tue, 19 Nov 2019 05:36:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574141768; bh=8C77Ah9eGNmpKFrXn+KY6E4yKZ1R8Yn9FxFLckt44Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LLgMpwsd/Ot3mF914VUUu/s9mYeapZ3C9Svd5lRKKnF1CGC4sdK6YvKVn/KI6+0UT oImx3eNtxaOE1OhpFneg8tjrHfpkjPnjFl8M9Ox7qSa09P0OHparrcuViLT5wIV71+ 1CMikSIx4DwcrHmX/mkED7O1/98oiamEkstXoDsI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Claudiu Beznea , Nicolas Ferre , Sebastian Reichel , Sasha Levin Subject: [PATCH 4.19 224/422] power: reset: at91-poweroff: do not procede if at91_shdwc is allocated Date: Tue, 19 Nov 2019 06:17:01 +0100 Message-Id: <20191119051413.150080240@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191119051400.261610025@linuxfoundation.org> References: <20191119051400.261610025@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Claudiu Beznea [ Upstream commit 9f1e44774be578fb92776add95f1fcaf8284d692 ] 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 Acked-by: Nicolas Ferre Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- 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 0206cce328b3d..d9493e893d64e 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -246,6 +246,9 @@ 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; -- 2.20.1