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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 4AAD8C43461 for ; Sat, 5 Sep 2020 20:43:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09B9B20760 for ; Sat, 5 Sep 2020 20:43:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="utOcaYZG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728805AbgIEUnI (ORCPT ); Sat, 5 Sep 2020 16:43:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728755AbgIEUmr (ORCPT ); Sat, 5 Sep 2020 16:42:47 -0400 Received: from mail-lf1-x142.google.com (mail-lf1-x142.google.com [IPv6:2a00:1450:4864:20::142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F932C061246; Sat, 5 Sep 2020 13:42:45 -0700 (PDT) Received: by mail-lf1-x142.google.com with SMTP id y2so5584317lfy.10; Sat, 05 Sep 2020 13:42:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=09tURB04/re3f0PypS3f04oI3QsoaJnQPq+D48ZVbS4=; b=utOcaYZGLHILJ5FtANar2RQFtxya6eCwFqjIPqSlm8HQP1YW6hvtz0zkAsjKtoycD/ Z+YKVr1UGUEl0ZNwixOCHMikatXk10bIR+O2uxBeq40T9V6Cw3TsUDMSmxCSvCt9Keut ycyK2n1QJkdbw4vWtG2BoK28LMHx8WnUesG4FbTtq2yID4X4NGmLBgThJXO4EZw0Ljws aOZvFjQbEftRi5xdaTLD32XSdyEoCkCOotZjigE/2WOroMegkvmFDLodp+nto1iGN2Mv ZvY4IzXbWNzKTDBQkeCDh1liTGFZO/w76m/USxkmX6iaVkO75aGLFrA/w0tDkjkaT8Ub IrQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=09tURB04/re3f0PypS3f04oI3QsoaJnQPq+D48ZVbS4=; b=cK9FnfDP1EI4bQt6BoWQ6rt8ywBzIqS1TNRWZyySXkH7RjY8kuA8aa/iCeDkq4gM89 YNZ0pbfNS5IMpENd6PefztNfaR2I9IcS1KaluHSWhGCYSXCGjgIGXDtpQ1rpmJipaF4T 5npVfHnV5JagO7N2CfeidflZaZIcINjjgk7YEoz2EH8WYK94Wv+CGYAm7JHSKJ1hYUPA xx6QRwELEmgrmRvX5v+m7P9MsL4LsiWNWcz/J8t0Dplasliuk8R9l5V/zRXezPw7tUfr wWljwgrtcDQ08zflwVIZTCdYsI9EIq3Q2NY7oVHYea9ePmfoEq58Czzb04JxO+HvcB9W dsvA== X-Gm-Message-State: AOAM533od4i6p7CAj7idDeiAyrYcVmpT7QKe6DOiOub8do4AjQTg5E62 YQr5NdPMHYfov4F81/63OeY= X-Google-Smtp-Source: ABdhPJxrxyFgtqyN3otW/xvJhOxgcYjd9rWUuBc0VsYcwFwEoZMfAfWQ/WApeQVBOVe8RNE7wdCr+g== X-Received: by 2002:ac2:546a:: with SMTP id e10mr6752525lfn.100.1599338563833; Sat, 05 Sep 2020 13:42:43 -0700 (PDT) Received: from localhost.localdomain (109-252-170-211.dynamic.spd-mgts.ru. [109.252.170.211]) by smtp.gmail.com with ESMTPSA id e17sm1677763ljn.18.2020.09.05.13.42.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Sep 2020 13:42:43 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Laxman Dewangan , Wolfram Sang , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Andy Shevchenko Cc: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 21/31] i2c: tegra: Factor out error recovery from tegra_i2c_xfer_msg() Date: Sat, 5 Sep 2020 23:41:41 +0300 Message-Id: <20200905204151.25343-22-digetx@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200905204151.25343-1-digetx@gmail.com> References: <20200905204151.25343-1-digetx@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Factor out error recovery code from tegra_i2c_xfer_msg() in order to make this function easier to read and follow. Reviewed-by: Michał Mirosław Signed-off-by: Dmitry Osipenko --- drivers/i2c/busses/i2c-tegra.c | 46 ++++++++++++++++++++++------------ 1 file changed, 30 insertions(+), 16 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 6ec6161a1895..aa7adf8df668 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1134,6 +1134,32 @@ static int tegra_i2c_issue_bus_clear(struct i2c_adapter *adap) return -EAGAIN; } +static int tegra_i2c_error_recover(struct tegra_i2c_dev *i2c_dev, + struct i2c_msg *msg) +{ + if (i2c_dev->msg_err == I2C_ERR_NONE) + return 0; + + tegra_i2c_init(i2c_dev); + + /* start recovery upon arbitration loss in single master mode */ + if (i2c_dev->msg_err == I2C_ERR_ARBITRATION_LOST) { + if (!i2c_dev->is_multimaster_mode) + return i2c_recover_bus(&i2c_dev->adapter); + + return -EAGAIN; + } + + if (i2c_dev->msg_err == I2C_ERR_NO_ACK) { + if (msg->flags & I2C_M_IGNORE_NAK) + return 0; + + return -EREMOTEIO; + } + + return -EIO; +} + static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, struct i2c_msg *msg, enum msg_end_type end_state) @@ -1315,24 +1341,12 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, i2c_dev->msg_err); i2c_dev->is_curr_dma_xfer = false; - if (i2c_dev->msg_err == I2C_ERR_NONE) - return 0; - tegra_i2c_init(i2c_dev); - /* start recovery upon arbitration loss in single master mode */ - if (i2c_dev->msg_err == I2C_ERR_ARBITRATION_LOST) { - if (!i2c_dev->is_multimaster_mode) - return i2c_recover_bus(&i2c_dev->adapter); - return -EAGAIN; - } - - if (i2c_dev->msg_err == I2C_ERR_NO_ACK) { - if (msg->flags & I2C_M_IGNORE_NAK) - return 0; - return -EREMOTEIO; - } + err = tegra_i2c_error_recover(i2c_dev, msg); + if (err) + return err; - return -EIO; + return 0; } static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], -- 2.27.0