From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bh-25.webhostbox.net (bh-25.webhostbox.net [208.91.199.152]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id F0FD91A0AA4 for ; Fri, 10 Oct 2014 00:26:53 +1100 (EST) Received: from mailnull by bh-25.webhostbox.net with sa-checked (Exim 4.82) (envelope-from ) id 1XcDk4-000kwV-6q for linuxppc-dev@lists.ozlabs.org; Thu, 09 Oct 2014 13:26:52 +0000 Message-ID: <54368D16.40404@roeck-us.net> Date: Thu, 09 Oct 2014 06:26:46 -0700 From: Guenter Roeck MIME-Version: 1.0 To: Lee Jones , Catalin Marinas Subject: Re: [PATCH 12/44] mfd: ab8500-sysctrl: Register with kernel poweroff handler References: <1412659726-29957-1-git-send-email-linux@roeck-us.net> <1412659726-29957-13-git-send-email-linux@roeck-us.net> <20141007080048.GB25331@lee--X1> <20141009103656.GF17836@e104818-lin.cambridge.arm.com> <20141009104927.GN20647@lee--X1> In-Reply-To: <20141009104927.GN20647@lee--X1> Content-Type: text/plain; charset=utf-8; format=flowed Cc: "linux-m32r-ja@ml.linux-m32r.org" , "linux-mips@linux-mips.org" , "linux-m68k@vger.kernel.org" , "linux-efi@vger.kernel.org" , "linux-ia64@vger.kernel.org" , "linux-sh@vger.kernel.org" , Linus Walleij , "devicetree@vger.kernel.org" , "devel@driverdev.osuosl.org" , "linux-s390@vger.kernel.org" , "lguest@lists.ozlabs.org" , "linux-c6x-dev@linux-c6x.org" , "linux-hexagon@vger.kernel.org" , "linux-acpi@vger.kernel.org" , "xen-devel@lists.xenproject.org" , "linux-xtensa@linux-xtensa.org" , "user-mode-linux-devel@lists.sourceforge.net" , "linux-pm@vger.kernel.org" , "adi-buildroot-devel@lists.sourceforge.net" , "linux-am33-list@redhat.com" , "linux-tegra@vger.kernel.org" , "openipmi-developer@lists.sourceforge.net" , "linux-metag@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Samuel Ortiz , "linux-cris-kernel@axis.com" , "linux-parisc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-alpha@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 10/09/2014 03:49 AM, Lee Jones wrote: > On Thu, 09 Oct 2014, Catalin Marinas wrote: > >> On Tue, Oct 07, 2014 at 09:00:48AM +0100, Lee Jones wrote: >>> On Mon, 06 Oct 2014, Guenter Roeck wrote: >>>> --- a/drivers/mfd/ab8500-sysctrl.c >>>> +++ b/drivers/mfd/ab8500-sysctrl.c >>>> @@ -6,6 +6,7 @@ >>> >>> [...] >>> >>>> +static int ab8500_power_off(struct notifier_block *this, unsigned long unused1, >>>> + void *unused2) >>>> { >>>> sigset_t old; >>>> sigset_t all; >>>> @@ -34,11 +36,6 @@ static void ab8500_power_off(void) >>>> struct power_supply *psy; >>>> int ret; >>>> >>>> - if (sysctrl_dev == NULL) { >>>> - pr_err("%s: sysctrl not initialized\n", __func__); >>>> - return; >>>> - } >>> >>> Can you explain the purpose of this change please? >> >> I guess it's because the sysctrl_dev is already initialised when >> registering the power_off handler, so there isn't a way to call the >> above function with a NULL sysctrl_dev. Probably even with the original >> code you didn't need this check (after some race fix in >> ab8500_sysctrl_remove but races is one of the things Guenter's patches >> try to address). > > Sounds reasonable, although I think this change should be part of > another patch. > Sure, no problem. I'll split this into two patches. Since we are at it, any idea what to do with the restart function in the same file ? It is not used anywhere. Guenter