From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50076 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729124AbeIREis (ORCPT ); Tue, 18 Sep 2018 00:38:48 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Osipenko , Stefan Agner , Linus Walleij , Sasha Levin Subject: [PATCH 4.18 051/158] gpio: tegra: Move driver registration to subsys_init level Date: Tue, 18 Sep 2018 00:41:21 +0200 Message-Id: <20180917211713.586361837@linuxfoundation.org> In-Reply-To: <20180917211710.383360696@linuxfoundation.org> References: <20180917211710.383360696@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Osipenko [ Upstream commit 40b25bce0adbe641a744d1291bc0e51fb7f3c3d8 ] There is a bug in regards to deferred probing within the drivers core that causes GPIO-driver to suspend after its users. The bug appears if GPIO-driver probe is getting deferred, which happens after introducing dependency on PINCTRL-driver for the GPIO-driver by defining "gpio-ranges" property in device-tree. The bug in the drivers core is old (more than 4 years now) and is well known, unfortunately there is no easy fix for it. The good news is that we can workaround the deferred probe issue by changing GPIO / PINCTRL drivers registration order and hence by moving PINCTRL driver registration to the arch_init level and GPIO to the subsys_init. Signed-off-by: Dmitry Osipenko Acked-by: Stefan Agner Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpio-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -720,4 +720,4 @@ static int __init tegra_gpio_init(void) { return platform_driver_register(&tegra_gpio_driver); } -postcore_initcall(tegra_gpio_init); +subsys_initcall(tegra_gpio_init);