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 9D669C5DF60 for ; Fri, 8 Nov 2019 12:03:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7420E2085B for ; Fri, 8 Nov 2019 12:03:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573214586; bh=8C77Ah9eGNmpKFrXn+KY6E4yKZ1R8Yn9FxFLckt44Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OGgx5GaVPwDnJVLKZ0v14h1sDmuPwtIz7lbC07ppMx5AHxUVCY/4qmramqYlRYEX+ 99TZnX2CrSbT81pO/G+OH6ABtrC7h/N22ctNqcs4veuW4vHYO8vcbNLPR8B0xY8QcB X/6/oX5ZZEcKzQxrPijY3DmbGPXuAo/GEQI22y6k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388120AbfKHLmu (ORCPT ); Fri, 8 Nov 2019 06:42:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:56942 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390159AbfKHLmr (ORCPT ); Fri, 8 Nov 2019 06:42:47 -0500 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 368C8222C5; Fri, 8 Nov 2019 11:42:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573213366; bh=8C77Ah9eGNmpKFrXn+KY6E4yKZ1R8Yn9FxFLckt44Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Lc9BkQgBg602v4bPkH5xpIqo61dR+xmj7J07vkqPmRu8Ejk7DRGv7xh41LvbHEUtj SU2PhkaHCvpNBNraWzFi2gzJNSfFRck8d9z4K7If7UTs2i9zQgOyHiFn3JNi/CnliA ZB9k3rTvBWBHKn01uEHYYNyMKlKkr/nBXn+tKQ3I= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Claudiu Beznea , Nicolas Ferre , Sebastian Reichel , Sasha Levin , linux-pm@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 194/205] power: reset: at91-poweroff: do not procede if at91_shdwc is allocated Date: Fri, 8 Nov 2019 06:37:41 -0500 Message-Id: <20191108113752.12502-194-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191108113752.12502-1-sashal@kernel.org> References: <20191108113752.12502-1-sashal@kernel.org> MIME-Version: 1.0 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: 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