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=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 579BAC00523 for ; Sat, 4 Jan 2020 03:37:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B69D24655 for ; Sat, 4 Jan 2020 03:37:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578109028; bh=GKT58lcSKaSA0pAcUhA4C51VeeENbtCHQZUQKHfcBxA=; h=From:To:Cc:Subject:Date:List-ID:From; b=hyyw/4w1Vv/CoR5GOtYdFLbMul+VqgVVRJ/kTLZihcsWtzD+ln38MRHWEHHBOaH0l 6IfRPnOy8dhMfNnUlCptT2RtEd8glnvvSQeGo/00corBEl7cKubQsKRg6g1BDPzPqR xDSw1CjJj3sSuhSW4euySVf4j8OlS8ESSoPWVzQA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727815AbgADDhH (ORCPT ); Fri, 3 Jan 2020 22:37:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:38506 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727792AbgADDhF (ORCPT ); Fri, 3 Jan 2020 22:37:05 -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 95C982465A; Sat, 4 Jan 2020 03:37:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578109024; bh=GKT58lcSKaSA0pAcUhA4C51VeeENbtCHQZUQKHfcBxA=; h=From:To:Cc:Subject:Date:From; b=uaClVoTcN99q4aT5moxg6bxe7Jj2RX4QtHBUZ+AFeZov3DVL1ZafOJRljdWZn2Te8 W2nt4erMgoSMHI71c2HM5xPftEf4zqhC9jLVsMbujDFBVFej1BclJtOGMZrEmdYJ8w 52WgM8OUub6BahEZD1ZKjnEp4fY1sCPJNYUxbXNY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Johnson=20CH=20Chen=20=28=E9=99=B3=E6=98=AD=E5=8B=B3=29?= , Johnson Chen , Linus Walleij , Sasha Levin , linux-gpio@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 1/4] gpio: mpc8xxx: Add platform device to gpiochip->parent Date: Fri, 3 Jan 2020 22:36:59 -0500 Message-Id: <20200104033702.11304-1-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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: Johnson CH Chen (陳昭勳) [ Upstream commit 322f6a3182d42df18059a89c53b09d33919f755e ] Dear Linus Walleij, In old kernels, some APIs still try to use parent->of_node from struct gpio_chip, and it could be resulted in kernel panic because parent is NULL. Adding platform device to gpiochip->parent can fix this problem. Signed-off-by: Johnson Chen Link: https://patchwork.kernel.org/patch/11234609 Link: https://lore.kernel.org/r/HK0PR01MB3521489269F76467DFD7843FFA450@HK0PR01MB3521.apcprd01.prod.exchangelabs.com Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- drivers/gpio/gpio-mpc8xxx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index 793518a30afe..db8da96c5f97 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -306,6 +306,7 @@ static int mpc8xxx_probe(struct platform_device *pdev) return -ENOMEM; gc = &mpc8xxx_gc->gc; + gc->parent = &pdev->dev; if (of_property_read_bool(np, "little-endian")) { ret = bgpio_init(gc, &pdev->dev, 4, -- 2.20.1