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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 293B1C433E0 for ; Thu, 28 Jan 2021 06:31:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFCFB64DD9 for ; Thu, 28 Jan 2021 06:31:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229791AbhA1Gbf (ORCPT ); Thu, 28 Jan 2021 01:31:35 -0500 Received: from mga11.intel.com ([192.55.52.93]:30344 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229513AbhA1Gbd (ORCPT ); Thu, 28 Jan 2021 01:31:33 -0500 IronPort-SDR: 9/glW3f/fxfRDs4J9Bo1JyGKXd3asTpamti0TfCIr8yRp+oUk+z5xJMNUF2kIE/bc/XlYUzg38 CH72QDVqoo0g== X-IronPort-AV: E=McAfee;i="6000,8403,9877"; a="176679077" X-IronPort-AV: E=Sophos;i="5.79,381,1602572400"; d="scan'208";a="176679077" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2021 22:29:47 -0800 IronPort-SDR: 2sHmcAycUWwl+qp8hg4k182E79KDApQRadpEl8N0fhTPpdZ9a70d9vMLTOoCaTPbA7pJElsNyo Tc3bD3LszZNw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,381,1602572400"; d="scan'208";a="574628257" Received: from mattu-haswell.fi.intel.com (HELO [10.237.72.170]) ([10.237.72.170]) by fmsmga006.fm.intel.com with ESMTP; 27 Jan 2021 22:29:45 -0800 Subject: Re: [PATCH 0/4] add xhci hooks for USB offload To: Howard Yen , Greg KH Cc: Mathias Nyman , robh+dt@kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210119101044.1637023-1-howardyen@google.com> From: Mathias Nyman Autocrypt: addr=mathias.nyman@linux.intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On 28.1.2021 5.38, Howard Yen wrote: > On Tue, Jan 26, 2021 at 10:19 PM Greg KH wrote: >> >> On Fri, Jan 22, 2021 at 05:32:58PM +0200, Mathias Nyman wrote: >>> >>> Ok, before adding hooks like this I think we need to see how they are used. >>> Do you have the rest of the patches that go on top of this series? >>> >>> Maybe it could make sense to use overrides for the functions in struct hc_driver >>> instead in some cases? There is support for that already. >> >> What overrides could be done for these changes? At first glance that >> would seem to require a lot of duplicated code in whatever override >> happens to be needed. >> >> thanks, >> >> greg k-h > > This patch series is all the changes for the offload hooks currently. > > I thought about this, but if I tried to override the functions in > struct hc_driver, that'll need to > copy many code to the override function, and it won't follow the > latest change in the core > xhci driver. > > > - Howard Ok, I see. The point I'm trying to make is that there is no way for me to know if these hooks are the right solution before I see any code using them. Is the offloading code ready and public somewhere? Thanks -Mathias