From patchwork Tue Jan 19 09:39:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 1428659 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; secure) header.d=sang-engineering.com header.i=@sang-engineering.com header.a=rsa-sha256 header.s=k1 header.b=lFqM8Bxb; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DKrpc67fDz9sSs for ; Wed, 20 Jan 2021 01:37:28 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387587AbhASOgQ (ORCPT ); Tue, 19 Jan 2021 09:36:16 -0500 Received: from www.zeus03.de ([194.117.254.33]:55106 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387712AbhASJkZ (ORCPT ); Tue, 19 Jan 2021 04:40:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=k1; bh=7oj9WQno7QEpA1 XamLc4MgaH1m7rUqRR3GpKdU/K1M0=; b=lFqM8BxbfRkKtAIH+OAQCIBqJ/edPp JDKwf35ERefl3U+wvK83fIYZpnHZyz/s20k7uUNgt28icomNL6aOPYiQYsqwm1s1 bohjfIVCxb3R+hPN86P5QcokI9CG8yqb8p3Gkza8tfz+tcAnnLyUJR7ZYjy1yftS viVYfXxUrMUNU= Received: (qmail 1003573 invoked from network); 19 Jan 2021 10:39:21 +0100 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 19 Jan 2021 10:39:21 +0100 X-UD-Smtp-Session: l3s3148p1@Gm/3nD258tkgAwDPXyX1ACWcscxtZ2TX From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Wolfram Sang , Corey Minyard , openipmi-developer@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] ipmi: remove open coded version of SMBus block write Date: Tue, 19 Jan 2021 10:39:10 +0100 Message-Id: <20210119093912.1838-4-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> References: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The block-write function of the core was not used because there was no client-struct to use. However, in this case it seems apropriate to use a temporary client struct. Because we are answering a request we recieved when being a client ourselves. So, convert the code to use a temporary client and use the block-write function of the I2C core. Signed-off-by: Wolfram Sang --- Changes since RFC: * don't use stack but kmemdup. No complaints from buildbots drivers/char/ipmi/ipmb_dev_int.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/char/ipmi/ipmb_dev_int.c b/drivers/char/ipmi/ipmb_dev_int.c index 382b28f1cf2f..49b8f22fdcf0 100644 --- a/drivers/char/ipmi/ipmb_dev_int.c +++ b/drivers/char/ipmi/ipmb_dev_int.c @@ -137,7 +137,7 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf, { struct ipmb_dev *ipmb_dev = to_ipmb_dev(file); u8 rq_sa, netf_rq_lun, msg_len; - union i2c_smbus_data data; + struct i2c_client *temp_client; u8 msg[MAX_MSG_LEN]; ssize_t ret; @@ -160,21 +160,21 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf, } /* - * subtract rq_sa and netf_rq_lun from the length of the msg passed to - * i2c_smbus_xfer + * subtract rq_sa and netf_rq_lun from the length of the msg. Fill the + * temporary client. Note that its use is an exception for IPMI. */ msg_len = msg[IPMB_MSG_LEN_IDX] - SMBUS_MSG_HEADER_LENGTH; - if (msg_len > I2C_SMBUS_BLOCK_MAX) - msg_len = I2C_SMBUS_BLOCK_MAX; + temp_client = kmemdup(ipmb_dev->client, sizeof(*temp_client), GFP_KERNEL); + if (!temp_client) + return -ENOMEM; + + temp_client->addr = rq_sa; - data.block[0] = msg_len; - memcpy(&data.block[1], msg + SMBUS_MSG_IDX_OFFSET, msg_len); - ret = i2c_smbus_xfer(ipmb_dev->client->adapter, rq_sa, - ipmb_dev->client->flags, - I2C_SMBUS_WRITE, netf_rq_lun, - I2C_SMBUS_BLOCK_DATA, &data); + ret = i2c_smbus_write_block_data(temp_client, netf_rq_lun, msg_len, + msg + SMBUS_MSG_IDX_OFFSET); + kfree(temp_client); - return ret ? : count; + return ret < 0 ? ret : count; } static __poll_t ipmb_poll(struct file *file, poll_table *wait)