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,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 48E18C43215 for ; Fri, 22 Nov 2019 10:43:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14F60205C9 for ; Fri, 22 Nov 2019 10:43:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574419438; bh=HShIySpLPUNeFNOt26VHwgmGLAKWF2+VsW+uRVUMwGI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cxiSE0xEiR9rR1H56XgrR0MQVoqUQF7ZyMcxjs8KyjRJEAK/dJtI9OdMMfY3kXKN2 eIOyn4CRXdzePmhbvBvFVlxOrbsG25kLGFLmq0yHSbqeFCATyTB2ltEnbMLTDntB3W C2PKNZHNVhL0q6UEZTAqOnN36sJ6rVk5N3JQSQxI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727653AbfKVKn4 (ORCPT ); Fri, 22 Nov 2019 05:43:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:49604 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727646AbfKVKnx (ORCPT ); Fri, 22 Nov 2019 05:43:53 -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 4FE6320715; Fri, 22 Nov 2019 10:43:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574419432; bh=HShIySpLPUNeFNOt26VHwgmGLAKWF2+VsW+uRVUMwGI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zLhCZQutHFwWZWeF0dS9XhHMW7tg5lLPWLW8DxOsw6v5TrTWfne8xg5PYCch6AVnZ nWk/r65sdOms7WfI3fR5MZI2vpg3a5FaP1YcMwjDzI5izD97BRV4iQXhvttDEyikFN DLE+dYeqxe06i3GbNsLJXfrIgnsd72vdthJ2h5Xw= 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 4.9 073/222] power: reset: at91-poweroff: do not procede if at91_shdwc is allocated Date: Fri, 22 Nov 2019 11:26:53 +0100 Message-Id: <20191122100907.543194787@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191122100830.874290814@linuxfoundation.org> References: <20191122100830.874290814@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 90b0b5a70ce52..04ca990e8f6cb 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