From patchwork Tue Oct 4 09:21:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12998046 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E96C7C43217 for ; Tue, 4 Oct 2022 09:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231148AbiJDJWt (ORCPT ); Tue, 4 Oct 2022 05:22:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229761AbiJDJWL (ORCPT ); Tue, 4 Oct 2022 05:22:11 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D9D5192B0; Tue, 4 Oct 2022 02:21:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664875280; x=1696411280; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lu5K2V7nFBFYObZ1dwJ6OVK1LUkbq3YmYSLm5miq5Ug=; b=I2rlIn0hAEGBwlw1DhKf+eoMfKG7jHCTCC5vil7z3bYRc2s2/LW3GwQ0 wlr8K3C1KtkE+RpzU23EWJ7eSAkSDtjLYnYXhq68MmvzrIgQxL+/CxkY/ yoB95ZtIv0JKKsilylnxj4J+gSqqPnHiai4SzdJzbNscxIu308MBgXLAJ TeNIJ7UKrfYEkfc0uxla+3gyrZENDprWNpiNdZpFOzLeljh3eUNx0R1Ex 1T39EIJ5r0SCuom+O82XvGrqMIQdz+Aowqb6/1h7GFCfuO0fk7Wn8syja 5hXAtODsiBvFTERiucXX9dW5KQQPRl43oTS8nmP6hj3hdr5Bqhgno6RsQ g==; X-IronPort-AV: E=McAfee;i="6500,9779,10489"; a="303824988" X-IronPort-AV: E=Sophos;i="5.93,367,1654585200"; d="scan'208";a="303824988" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2022 02:21:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10489"; a="623865973" X-IronPort-AV: E=Sophos;i="5.93,367,1654585200"; d="scan'208";a="623865973" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 04 Oct 2022 02:21:12 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 8338F45; Tue, 4 Oct 2022 12:21:31 +0300 (EEST) From: Andy Shevchenko To: Andy Shevchenko , Heikki Krogerus , Sakari Ailus , Greg Kroah-Hartman , Bjorn Andersson , Prashant Malani , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Cc: Daniel Scally , "Rafael J. Wysocki" Subject: [PATCH v3 1/5] device property: Allow const parameter to dev_fwnode() Date: Tue, 4 Oct 2022 12:21:25 +0300 Message-Id: <20221004092129.19412-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221004092129.19412-1-andriy.shevchenko@linux.intel.com> References: <20221004092129.19412-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org It's not fully correct to take a const parameter pointer to a struct and return a non-const pointer to a member of that struct. Instead, introduce a const version of the dev_fwnode() API which takes and returns const pointers and use it where it's applicable. With this, convert dev_fwnode() to be a macro wrapper on top of const and non-const APIs that chooses one based on the type. Suggested-by: Sakari Ailus Fixes: aade55c86033 ("device property: Add const qualifier to device_get_match_data() parameter") Signed-off-by: Andy Shevchenko Acked-by: Heikki Krogerus Reviewed-by: Sakari Ailus --- drivers/base/property.c | 11 +++++++++-- include/linux/property.h | 7 ++++++- 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index 4d6278a84868..d77302d28566 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -17,12 +17,19 @@ #include #include -struct fwnode_handle *dev_fwnode(const struct device *dev) +struct fwnode_handle *__dev_fwnode(struct device *dev) { return IS_ENABLED(CONFIG_OF) && dev->of_node ? of_fwnode_handle(dev->of_node) : dev->fwnode; } -EXPORT_SYMBOL_GPL(dev_fwnode); +EXPORT_SYMBOL_GPL(__dev_fwnode); + +const struct fwnode_handle *__dev_fwnode_const(const struct device *dev) +{ + return IS_ENABLED(CONFIG_OF) && dev->of_node ? + of_fwnode_handle(dev->of_node) : dev->fwnode; +} +EXPORT_SYMBOL_GPL(__dev_fwnode_const); /** * device_property_present - check if a property of a device is present diff --git a/include/linux/property.h b/include/linux/property.h index 117cc200c656..587b5b666b5b 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -32,7 +32,12 @@ enum dev_dma_attr { DEV_DMA_COHERENT, }; -struct fwnode_handle *dev_fwnode(const struct device *dev); +const struct fwnode_handle *__dev_fwnode_const(const struct device *dev); +struct fwnode_handle *__dev_fwnode(struct device *dev); +#define dev_fwnode(dev) \ + _Generic((dev), \ + const struct device *: __dev_fwnode_const, \ + struct device *: __dev_fwnode)(dev) bool device_property_present(struct device *dev, const char *propname); int device_property_read_u8_array(struct device *dev, const char *propname,