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[23.128.96.18]) by mx.google.com with ESMTP id ga4si3431033ejc.303.2021.03.01.04.15.07; Mon, 01 Mar 2021 04:15:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233225AbhCAMMJ (ORCPT + 99 others); Mon, 1 Mar 2021 07:12:09 -0500 Received: from mga01.intel.com ([192.55.52.88]:29289 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233146AbhCAMMF (ORCPT ); Mon, 1 Mar 2021 07:12:05 -0500 IronPort-SDR: kTRbvG632CVMz2BEBXE5F7D/cA6wShZbE7ju5ineyxUAmbPtRZ6Y+CyA3mnZ5f7GDG8IMtYY6e 7ois48GPeamA== X-IronPort-AV: E=McAfee;i="6000,8403,9909"; a="206048613" X-IronPort-AV: E=Sophos;i="5.81,215,1610438400"; d="scan'208";a="206048613" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2021 04:10:19 -0800 IronPort-SDR: SPCAxCdAecMLLqoTDlPItL7K2jphc+xnG0mvpY6E/DAH8K/05t3iT+nKl4vzN1yyUbHSvp9PML xkFhJTXkqcuA== X-IronPort-AV: E=Sophos;i="5.81,215,1610438400"; d="scan'208";a="435380055" Received: from smile.fi.intel.com (HELO smile) ([10.237.68.40]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2021 04:08:06 -0800 Received: from andy by smile with local (Exim 4.94) (envelope-from ) id 1lGhLA-0098TC-Sb; Mon, 01 Mar 2021 14:07:56 +0200 Date: Mon, 1 Mar 2021 14:07:56 +0200 From: Andy Shevchenko To: Jie Deng Cc: linux-i2c@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, mst@redhat.com, wsa@kernel.org, jasowang@redhat.com, wsa+renesas@sang-engineering.com, conghui.chen@intel.com, arnd@arndb.de, kblaiech@mellanox.com, jarkko.nikula@linux.intel.com, Sergey.Semin@baikalelectronics.ru, rppt@kernel.org, loic.poulain@linaro.org, tali.perry1@gmail.com, u.kleine-koenig@pengutronix.de, bjorn.andersson@linaro.org, yu1.wang@intel.com, shuo.a.liu@intel.com, viresh.kumar@linaro.org Subject: Re: [PATCH v5] i2c: virtio: add a virtio i2c frontend driver Message-ID: References: <00f826ffe1b6b4f5fb41de2b55ad6b8783b7ff45.1614579846.git.jie.deng@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00f826ffe1b6b4f5fb41de2b55ad6b8783b7ff45.1614579846.git.jie.deng@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 01, 2021 at 02:41:35PM +0800, Jie Deng wrote: > Add an I2C bus driver for virtio para-virtualization. > > The controller can be emulated by the backend driver in > any device model software by following the virtio protocol. > > The device specification can be found on > https://lists.oasis-open.org/archives/virtio-comment/202101/msg00008.html. > > By following the specification, people may implement different > backend drivers to emulate different controllers according to > their needs. ... > + buf = kzalloc(msgs[i].len, GFP_KERNEL); > + if (!buf) > + break; > + > + if (msgs[i].flags & I2C_M_RD) { kzalloc() > + reqs[i].read_buf = buf; > + sg_init_one(&msg_buf, reqs[i].read_buf, msgs[i].len); > + sgs[outcnt + incnt++] = &msg_buf; > + } else { > + reqs[i].write_buf = buf; > + memcpy(reqs[i].write_buf, msgs[i].buf, msgs[i].len); kmemdup() ? > + sg_init_one(&msg_buf, reqs[i].write_buf, msgs[i].len); > + sgs[outcnt++] = &msg_buf; > + } ... > + > + One blank line is enough. ... > + ret = virtio_i2c_send_reqs(vq, reqs, msgs, num); > + if (ret == 0) > + goto err_unlock_free; > + else Redundant. > + nr = ret; -- With Best Regards, Andy Shevchenko