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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 8538AC71156 for ; Mon, 30 Nov 2020 16:06:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1519820665 for ; Mon, 30 Nov 2020 16:06:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="ukBZ4UDf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728507AbgK3QFw (ORCPT ); Mon, 30 Nov 2020 11:05:52 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:59736 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726376AbgK3QFv (ORCPT ); Mon, 30 Nov 2020 11:05:51 -0500 Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8A450B26; Mon, 30 Nov 2020 17:05:08 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1606752308; bh=R3YZAWsAzHLLQsNSGkEkvAnv9GYITFP7tVg7VAeMYJg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ukBZ4UDf0pvm4SaqWyGZAJvxW2dfBefJG+2KANcPS8xICerY993eCbFVYDlzpjHjQ Cku3nt4o1PXIoyP3Jq4s4rjUz+8PTm16an9CBqq3U5cW2wvaPjvatLkmCg9VY9ETuf Lkejx//d210dxEje3qZVhQ8EJ6asCAlZQGyVtQOs= Date: Mon, 30 Nov 2020 18:05:00 +0200 From: Laurent Pinchart To: Daniel Scally Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, linux-media@vger.kernel.org, devel@acpica.org, rjw@rjwysocki.net, lenb@kernel.org, gregkh@linuxfoundation.org, mika.westerberg@linux.intel.com, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, bgolaszewski@baylibre.com, wsa@kernel.org, yong.zhi@intel.com, sakari.ailus@linux.intel.com, bingbu.cao@intel.com, tian.shu.qiu@intel.com, mchehab@kernel.org, robert.moore@intel.com, erik.kaneda@intel.com, pmladek@suse.com, rostedt@goodmis.org, sergey.senozhatsky@gmail.com, linux@rasmusvillemoes.dk, kieran.bingham+renesas@ideasonboard.com, jacopo+renesas@jmondi.org, laurent.pinchart+renesas@ideasonboard.com, jorhand@linux.microsoft.com, kitakar@gmail.com, heikki.krogerus@linux.intel.com Subject: Re: [PATCH 01/18] property: Return true in fwnode_device_is_available for node types that do not implement this operation Message-ID: <20201130160500.GD14465@pendragon.ideasonboard.com> References: <20201130133129.1024662-1-djrscally@gmail.com> <20201130133129.1024662-2-djrscally@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20201130133129.1024662-2-djrscally@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Daniel, Thank you for the patch. On Mon, Nov 30, 2020 at 01:31:12PM +0000, Daniel Scally wrote: > Some types of fwnode_handle do not implement the device_is_available() > check, such as those created by software_nodes. There isn't really a > meaningful way to check for the availability of a device that doesn't > actually exist, so if the check isn't implemented just assume that the > "device" is present. > > Suggested-by: Laurent Pinchart > Signed-off-by: Daniel Scally Reviewed-by: Laurent Pinchart > --- > Changes since RFC v3: > > patch introduced > > drivers/base/property.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index 4c43d30145c6..a5ca2306796f 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -785,9 +785,14 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put); > /** > * fwnode_device_is_available - check if a device is available for use > * @fwnode: Pointer to the fwnode of the device. > + * > + * For fwnode node types that don't implement the .device_is_available() > + * operation, this function returns true. > */ > bool fwnode_device_is_available(const struct fwnode_handle *fwnode) > { > + if (!fwnode_has_op(fwnode, device_is_available)) > + return true; > return fwnode_call_bool_op(fwnode, device_is_available); > } > EXPORT_SYMBOL_GPL(fwnode_device_is_available); -- Regards, Laurent Pinchart