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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 35C47CA1012 for ; Thu, 4 Sep 2025 19:51:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CKGdY7RmH5cAzEkh5vkCldeRjcibzV04dgx9oeEZxdg=; b=fAvGPd+yDCZU3jf9AUxEMwMywx M2eVBb/pZFFE77opqaFs4UuztZsrqJmuCm4DZzm57Cyl45EuhgYhaR01jlgdbVDTFvD5LJt9T7inR olqb6L/ApAavJIooimizEjtzp6qUfgjpb76ktphz0r8WoK7dp/M1lty3EUfUG8cVMvaTGPQQtodxf 9J619y+TDdnxx4uSDs+xFKiv9hWu3kgxPG8SMzzd1KUHBHNy6xh0mqXMSv8R06gXtE1os6Vuy799Q eZJnJtqNDHVmu6v7rO4EYzTipu7hkPST1cuUvmVKGl3asdjTqoWrzoR+1PDUo6Oc3zWL0tjx68kbT Ln0oLBVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uuFzC-0000000E0rA-2XFZ; Thu, 04 Sep 2025 19:51:10 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uuA9y-0000000BwLF-3qxE for linux-arm-kernel@lists.infradead.org; Thu, 04 Sep 2025 13:37:56 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id A651C44BFB; Thu, 4 Sep 2025 13:37:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D530CC4CEF0; Thu, 4 Sep 2025 13:37:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756993074; bh=IZYPvmhp4Lu67EYKMyAIk7sdK71xXGH4/n1ufrRtfgU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=NLmzmxUPhrUNM/sfjImKJAHD31D8b9GHAc1ioUIZLX12iEeXiOAZOHok9OBF3Fxiq /atb96duOLqQMAa7f/7zFPzpRTmGmiYC5mv8uI4IW7lJMKvFu0BTqDW55qhDwkg842 kCjXJrDGNNKTKwUX9NMf6XtG43LxmCYvSgk6U+Q+YUf6mNYWGC0h7glxQkPJ20LbxP YCM5nR0eS7r0XI1J4AtBkwyGsLQkYDWg+NSuzU5bmsmAgu9WqjYgMC+GHpcE5BoI1F 8zGtHZHYCtWwbBGd+12NQqWYZIk4Y5GJwFJwntobpugQuXr9tfN2Mt8uV/7LjNXzh6 ii9GmFTlCfbQg== Date: Thu, 4 Sep 2025 06:37:52 -0700 From: Jakub Kicinski To: Richard Cochran Cc: Wei Fang , "andrew+netdev@lunn.ch" , "davem@davemloft.net" , "edumazet@google.com" , "pabeni@redhat.com" , Vladimir Oltean , Clark Wang , Frank Li , "Y.B. Lu" , "christophe.leroy@csgroup.eu" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "imx@lists.linux.dev" Subject: Re: [PATCH net-next 0/3] ptp: add pulse signal loopback support for debugging Message-ID: <20250904063752.3183d523@kernel.org> In-Reply-To: References: <20250903083749.1388583-1-wei.fang@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250904_063754_984460_10EB6BDB X-CRM114-Status: GOOD ( 11.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 4 Sep 2025 06:05:02 -0700 Richard Cochran wrote: > On Thu, Sep 04, 2025 at 01:55:43AM +0000, Wei Fang wrote: > > Vladimir helped explain its purpose in the thread, do you still think > > it is pointless? > > Vladimir gave practical examples for the use case, so no objection > from my side. I just wanted to understand how this is useful. > > Next time, it would be helpful to have that info in the cover letter. +1, let's get it reposted with updated cover letter. I'm tempted to ask for a description under Documentation/, tho, I'm not 100% clear whether authors expect users or driver developers to exercise the loop. Maybe such distinction doesn't even makes sense for embedded devices..