From patchwork Fri Nov 10 18:11:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 743634 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org [139.178.88.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C4C95C4332F for ; Fri, 10 Nov 2023 18:31:05 +0000 (UTC) Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 79E6F281025 for ; Fri, 10 Nov 2023 18:31:05 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 16E313A287; Fri, 10 Nov 2023 18:31:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="XbdZ///F" Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 481CF3A293 for ; Fri, 10 Nov 2023 18:31:03 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F975310F4; Fri, 10 Nov 2023 10:30:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699641003; x=1731177003; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GK90mbE0EOw3ya7gSntsxAU2F0RaNMKzpLtQIiMB+v0=; b=XbdZ///F0DxMg91BknwbvxUvAwOd+OqDXw8tuxoe9m2faAsx/IZL8DG6 64NDALRnUsW3KM+TcCIHynaoV4AtJOA6xHL72VkLjhkuGqj98BXCaB/+v k+GPLdM83gLIFgI7jRh2igRZeLkyjUoBRByOtuqQZONmEcTPUpm5XKr/X PrFsds83sFFyJvCvtlRB/unukMyZhHtTF/9mMShy+7N0dJl9GZaQhaJ7Z 1f9wgooz50pNAwUYwm+fvEeJ4dqXKKe7Y0bNt8vbOSyZHkNhVLsOXSbfw oPVjRf/HEId6kojuGQERN9IeZ+8mPUvX32SLewxA6iY8GvlLSDDnsZziY Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10890"; a="456715036" X-IronPort-AV: E=Sophos;i="6.03,291,1694761200"; d="scan'208";a="456715036" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Nov 2023 10:29:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10890"; a="763808228" X-IronPort-AV: E=Sophos;i="6.03,291,1694761200"; d="scan'208";a="763808228" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 10 Nov 2023 10:29:36 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 78C9979F; Fri, 10 Nov 2023 20:23:07 +0200 (EET) From: Andy Shevchenko To: Jarkko Nikula , Mario Limonciello , Herbert Xu , Andy Shevchenko , Wolfram Sang , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Mika Westerberg , Jan Dabros , Andi Shyti , Philipp Zabel , Hans de Goede Subject: [PATCH v3 03/25] i2c: designware: Fix reset call order in dw_i2c_plat_probe() Date: Fri, 10 Nov 2023 20:11:23 +0200 Message-ID: <20231110182304.3894319-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20231110182304.3894319-1-andriy.shevchenko@linux.intel.com> References: <20231110182304.3894319-1-andriy.shevchenko@linux.intel.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 We should not mix managed calls with non-managed. This will break the calls order at the error path and ->remove() stages. Fix this by wrapping reset control to become managed one. With that start checking the rerurn code from reset_control_deassert() as it may fail and calling assertion in that scenario is not always a good idea. Fixes: ab809fd81fde ("i2c: designware: add reset interface") Signed-off-by: Andy Shevchenko --- drivers/i2c/busses/i2c-designware-platdrv.c | 56 ++++++++++++--------- 1 file changed, 33 insertions(+), 23 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 8b0099e1bc26..648fb84e574d 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -285,6 +285,28 @@ static void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev) i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev); } +static void dw_i2c_plat_assert_reset(void *data) +{ + struct dw_i2c_dev *dev = data; + + reset_control_assert(dev->rst); +} + +static int dw_i2c_plat_get_reset(struct dw_i2c_dev *dev) +{ + int ret; + + dev->rst = devm_reset_control_get_optional_exclusive(dev->dev, NULL); + if (IS_ERR(dev->rst)) + return PTR_ERR(dev->rst); + + ret = reset_control_deassert(dev->rst); + if (ret) + return ret; + + return devm_add_action_or_reset(dev->dev, dw_i2c_plat_assert_reset, dev); +} + static int dw_i2c_plat_probe(struct platform_device *pdev) { struct i2c_adapter *adap; @@ -312,11 +334,9 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) if (ret) return ret; - dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); - if (IS_ERR(dev->rst)) - return PTR_ERR(dev->rst); - - reset_control_deassert(dev->rst); + ret = dw_i2c_plat_get_reset(dev); + if (ret) + return ret; t = &dev->timings; i2c_parse_fw_timings(&pdev->dev, t, false); @@ -331,30 +351,26 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) ret = i2c_dw_validate_speed(dev); if (ret) - goto exit_reset; + return ret; ret = i2c_dw_probe_lock_support(dev); if (ret) - goto exit_reset; + return ret; i2c_dw_configure(dev); /* Optional interface clock */ dev->pclk = devm_clk_get_optional(&pdev->dev, "pclk"); - if (IS_ERR(dev->pclk)) { - ret = PTR_ERR(dev->pclk); - goto exit_reset; - } + if (IS_ERR(dev->pclk)) + return PTR_ERR(dev->pclk); dev->clk = devm_clk_get_optional(&pdev->dev, NULL); - if (IS_ERR(dev->clk)) { - ret = PTR_ERR(dev->clk); - goto exit_reset; - } + if (IS_ERR(dev->clk)) + return PTR_ERR(dev->clk); ret = i2c_dw_prepare_clk(dev, true); if (ret) - goto exit_reset; + return ret; if (dev->clk) { u64 clk_khz; @@ -395,13 +411,9 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) ret = dw_i2c_plat_pm_setup(dev); if (ret) - goto exit_reset; + return ret; return i2c_dw_probe(dev); - -exit_reset: - reset_control_assert(dev->rst); - return ret; } static void dw_i2c_plat_remove(struct platform_device *pdev) @@ -418,8 +430,6 @@ static void dw_i2c_plat_remove(struct platform_device *pdev) pm_runtime_put_sync(&pdev->dev); i2c_dw_remove_lock_support(dev); - - reset_control_assert(dev->rst); } static int dw_i2c_plat_prepare(struct device *dev)