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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A52FC433F5 for ; Mon, 8 Nov 2021 15:34:10 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D3B74610C8 for ; Mon, 8 Nov 2021 15:34:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D3B74610C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 153A21680; Mon, 8 Nov 2021 16:33:18 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 153A21680 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1636385648; bh=fFgelFKkkOhRGyRzS/thA77p1NEX8a75TsITXcqDHxQ=; h=Date:From:To:Subject:References:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=va+PlChFooftXdRuwzp4Jd1f3/Z/gv7n8AgRfW97ibQkwn+UQV6AtyUklpz3DPeqQ Nf4o6yKm169wc1lvc6KU/P3827Y+oS/jw1Az0c1EMwd+vDkhGtb462HaQndcvlSIIq F0k0JitYjyPPup5mKFDj3HPQ0AHWCFcfpHm+u3mI= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 56C0AF80516; Mon, 8 Nov 2021 16:30:36 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id B8074F8049E; Mon, 8 Nov 2021 15:24:53 +0100 (CET) Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 768B0F80107 for ; Mon, 8 Nov 2021 15:24:45 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 768B0F80107 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="BzFVBEJo" Received: from zn.tnic (p200300ec2f33110093973d8dfcf40fd9.dip0.t-ipconnect.de [IPv6:2003:ec:2f33:1100:9397:3d8d:fcf4:fd9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id D54F61EC04EE; Mon, 8 Nov 2021 15:24:40 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1636381481; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=oQBbYlaqexu4t08cRZdDH3XaT2khXLTGUfDdhXY+o6w=; b=BzFVBEJotdv+x1wk5r7BVthkB7IfDjFkcs3Qa23VnQgw6n7GoUvAnfTwnsI1XwsFUQ2pfc wTEtmUg2zpiIKZgiV8GtlPXLXcMCnwwX7vbzvuM7Jd46qSvtVDp/eqlUHv6UrUSSdUIxSB fTiz2Hj9eXxtQyoPpRyOqBuxOD7Awrk= Date: Mon, 8 Nov 2021 15:24:39 +0100 From: Borislav Petkov To: Alan Stern Subject: Re: [PATCH v0 00/42] notifiers: Return an error when callback is already registered Message-ID: References: <20211108101157.15189-1-bp@alien8.de> <20211108101924.15759-1-bp@alien8.de> <20211108141703.GB1666297@rowland.harvard.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20211108141703.GB1666297@rowland.harvard.edu> X-Mailman-Approved-At: Mon, 08 Nov 2021 16:29:18 +0100 Cc: alsa-devel@alsa-project.org, x86@kernel.org, linux-sh@vger.kernel.org, linux-iio@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-mips@vger.kernel.org, netdev@vger.kernel.org, Ayush Sawal , sparclinux@vger.kernel.org, linux-clk@vger.kernel.org, linux-leds@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Rohit Maheshwari , linux-staging@lists.linux.dev, bcm-kernel-feedback-list@broadcom.com, xen-devel@lists.xenproject.org, linux-xtensa@linux-xtensa.org, Arnd Bergmann , linux-pm@vger.kernel.org, intel-gfx@lists.freedesktop.org, Vinay Kumar Yadav , linux-um@lists.infradead.org, Steven Rostedt , rcu@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-tegra@vger.kernel.org, openipmi-developer@lists.sourceforge.net, intel-gvt-dev@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, linux-parisc@vger.kernel.org, Greg Kroah-Hartman , linux-usb@vger.kernel.org, LKML , linux-renesas-soc@vger.kernel.org, linux-crypto@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Mon, Nov 08, 2021 at 09:17:03AM -0500, Alan Stern wrote: > What reason is there for moving the check into the callers? It seems > like pointless churn. Why not add the error return code, change the > WARN to pr_warn, and leave the callers as they are? Wouldn't that end > up having exactly the same effect? > > For that matter, what sort of remedial action can a caller take if the > return code is -EEXIST? Is there any point in forcing callers to check > the return code if they can't do anything about it? See my reply to Geert from just now: https://lore.kernel.org/r/YYkyUEqcsOwQMb1S@zn.tnic I guess I can add another indirection to notifier_chain_register() and avoid touching all the call sites. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette