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=-6.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 8C8A6C11F69 for ; Fri, 2 Jul 2021 07:11:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 708F66141D for ; Fri, 2 Jul 2021 07:11:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230138AbhGBHOA (ORCPT ); Fri, 2 Jul 2021 03:14:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:44174 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230061AbhGBHN7 (ORCPT ); Fri, 2 Jul 2021 03:13:59 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4D38761413; Fri, 2 Jul 2021 07:11:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625209887; bh=Mibvu62IOZe2Lkw6vM0fw4PIqKEB5Yf0+oQ0fBY65rA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FGAanDMohkU6HiTxQoEN6+rBM8ZzqNW2TlXN0ah/6M/RH3wmp39OIIKTXyvtQlkRl 0q0S3YZCTH1It+JcHuKuU4Jsr0t0kyQt2IhrqAZOsTOA7JqGBwqeCpShIxcL5jdHUY 9WBIv7/9X774gqAlb94fpHRq7C2rD33HKC+znENS9Cm2kifEmXxU0zjG18jhq+KRze 0Cmrj6YLyw60cYdlT1q2G2ICz54Z2e4etIHvCUcONBfdAkN1yxSQSj7bWJ7/2duVhm 7iMRYUKtOLTl5x56/OtS/pzpNfyX0iGnWd2mTDgTaBWWO2fik/YBAw/WY5YodYaJ3E fIGlTHICsWHWw== Date: Fri, 2 Jul 2021 09:11:23 +0200 From: Wolfram Sang To: Viresh Kumar Cc: Jie Deng , linux-i2c@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, mst@redhat.com, arnd@arndb.de, jasowang@redhat.com, andriy.shevchenko@linux.intel.com, yu1.wang@intel.com, shuo.a.liu@intel.com, conghui.chen@intel.com, stefanha@redhat.com Subject: Re: [PATCH v11] i2c: virtio: add a virtio i2c frontend driver Message-ID: Mail-Followup-To: Wolfram Sang , Viresh Kumar , Jie Deng , linux-i2c@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, mst@redhat.com, arnd@arndb.de, jasowang@redhat.com, andriy.shevchenko@linux.intel.com, yu1.wang@intel.com, shuo.a.liu@intel.com, conghui.chen@intel.com, stefanha@redhat.com References: <510c876952efa693339ab0d6cc78ba7be9ef6897.1625104206.git.jie.deng@intel.com> <20210701040436.p7kega6rzeqz5tlm@vireshk-i7> <20210702045512.u4dvbapoc5a2a4jb@vireshk-i7> <409b6cc3-3339-61b2-7f42-0c69b6486bb3@intel.com> <20210702065625.qielhnfyrlvrtrkk@vireshk-i7> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="/XUpIFFYNKrrMPwB" Content-Disposition: inline In-Reply-To: <20210702065625.qielhnfyrlvrtrkk@vireshk-i7> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --/XUpIFFYNKrrMPwB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > The i2c core doesn't club requests together from different clients in a single > i2c_transfer() call. So you must assume i2c_transfer(), irrespective of the > number of underlying messages in it, as atomic. If you fail, the client is going > to retry everything again or assume it failed completely. Ack. --/XUpIFFYNKrrMPwB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmDevBcACgkQFA3kzBSg KbZbeg//aCI91lCZMHm+uJ6uUzNvwe3b/KoXnF+kTdGaJBIMvjRh401GcCHNQhMk LLif2oTFCKdGOR1bzHcxedFlk7JSD1QjOYz1GWskXYEmdFVUcm6+0WQY6+ljaH0D F/1Nef30Y+BbQsWt8hSgzpRWtLlRtXJ2r3I9Oux6jQ8YzclR4kFe0FokzppZDzt9 EIT/eb2IAgoRdGraEkPR4XwzaPDRMd933kqtihb5FaH9Cd3v6pAogrfP+xFRpqW5 VFl6NSg05jBbDvvH1SQWqpcAOJ+tDqibEMdPHjiXBhrv62TgWzXEyvpFVSbUS8pf iFPQDrL2W/N5DG7Js1edD/hgia9STt8Vd/GXf8FVAXDDK69bkW+NFXHf0AQ5sdAA 5fzlc/LaLqekFwMy57nlv/uX23jVe/4K6A9Ptz9M5HujIKV4/KReArQbcldpAaxT lbq5jhyhhJ6RaEY43EjENqCCKatkd7Ztbo25zIJeQfvv0FRsqw0Bj67Z/smwZF3U rkK2awmvT0NgfkTRZ5ARMyPjRVO2rctwekv5PXICODXWRxEo8f7ngYSdvWAZx/WF K/Be4l3FkdBgTPJO5fBUX/pNgMC++36r9mfMLhzi8iYesmF7+75sMrfzi+ZJ6EV5 tXSXK794Tfi/vFfXftBRstRb6q/IrgA1xfi1uDSEgdpk6x4WcXw= =w867 -----END PGP SIGNATURE----- --/XUpIFFYNKrrMPwB--