From patchwork Mon Dec 14 11:07:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 343484 Delivered-To: patch@linaro.org Received: by 2002:a02:85a7:0:0:0:0:0 with SMTP id d36csp2900356jai; Mon, 14 Dec 2020 03:09:13 -0800 (PST) X-Google-Smtp-Source: ABdhPJzm+RoyAj4Xdco0W8ykKbDeP7iuxL1KebE5gzFKhAc443G3eyBR3WGJ7Ulp0W462qxmmXBo X-Received: by 2002:aa7:d750:: with SMTP id a16mr24648500eds.252.1607944153779; Mon, 14 Dec 2020 03:09:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1607944153; cv=none; d=google.com; s=arc-20160816; b=ipVeh2hnI8+UuHi9r9yXCd2TFI58C+dbP4PCnBPqdLWrKlqLRDRjb3uZLmcz1S0QEf 1xoGyj4EOciO9s1t6cGFoZJJn2/2xWlOIfs5jKhsanRhT/J5ubJOPRcrE42hCHJQ4Zen MNPCiuXlCRy7JEyWIJDbJXGjI6BghxDdXBXu1Ywb/pz5glcgNgXP8Z8fSzB9WHEs7mdx E4U8SwM4Xw8aPCucNUoRoPLLfld6VUxD+Dmek4AljAXdDNazBKmLRG6xiSkS9m6atLhs ukCxpy2ryYKP5UfdAzpxoGnl0jTVzjlHQzW5NUF2Qf5EYj51FLHMsBkQ9vP7wuvsDqb5 x64w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=SFONqpKBx0+WGexIMJg0MppTIKw83Md/mUpNBwOPGvw=; b=j4ISVTJzSgSoS8JPqINxQCtCwIioKNckII95gM+ENboCuQ5VCFWZTeYIg9fO8amSV7 XBbopH2lKhKpIoVPEDYQkEenRmaFKO+9tFbq9zsOsf2k+GXFRdaSYvDIue2mRuALiocH 2IZWXbQZ0ct3t/AOxhVwhARsU8yHY40gooOAFBGFBsSn87quKgL/H7KjZ6UXHKs9MJWt q7mVGW2BDG4OvuEjwsZZHjh3aL0ke0vl1+IDGHu4jf3oJ/IGWlJgypWljtJE12Rzobfu noHZxslqz7gwosA2PG87nwOe/Ys5JZ23PlYbIlMv8QW5fK3lIqQCu3YHb0D3/NfeWktE ypmg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=EIEKyQp1; spf=pass (google.com: domain of linux-usb-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-usb-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id mm28si9243901ejb.138.2020.12.14.03.09.13; Mon, 14 Dec 2020 03:09:13 -0800 (PST) Received-SPF: pass (google.com: domain of linux-usb-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=EIEKyQp1; spf=pass (google.com: domain of linux-usb-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-usb-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727624AbgLNLJG (ORCPT + 4 others); Mon, 14 Dec 2020 06:09:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407689AbgLNLHa (ORCPT ); Mon, 14 Dec 2020 06:07:30 -0500 Received: from mail-lf1-x144.google.com (mail-lf1-x144.google.com [IPv6:2a00:1450:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D9EFC06179C for ; Mon, 14 Dec 2020 03:06:34 -0800 (PST) Received: by mail-lf1-x144.google.com with SMTP id y19so29068420lfa.13 for ; Mon, 14 Dec 2020 03:06:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SFONqpKBx0+WGexIMJg0MppTIKw83Md/mUpNBwOPGvw=; b=EIEKyQp1tYGSTyeqRijNIjiczO2nSEeSBQk8Ma/kB23zAfJ2RyTgZFzV0gAEE8GDZ7 Kz6qOl0CJ2jcPMaeq0jgh8wyIvMYZkNn5br85W90ieiSHichYtkjs9dg3KnsxlE73HaR q8s99VSj/i4PKdx8Me6eqBLB5Hl6wX0rYJqdZWuHQGmuSlEOy/2nNVnglr/lLue8u6Z0 qElKdwbtKKpdYzhLehEbdircnTUPwN8cC2yGbvQrC5udBjxmtS9kkQrM3VnnEl5XIXFF F1q+n9koowuSNU1GmhDyEFYQeKwVwjR4nN5TCQKU5Mszqe71hLNHwBHt7D5j/PvbRYj2 byAg== 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=SFONqpKBx0+WGexIMJg0MppTIKw83Md/mUpNBwOPGvw=; b=PxYXyq3Esrr9sHdR8/jcqTUmBUM5dCpej7f+GXdOQ0e15bc1MU4IoVWyLrxl6m7v5/ KlGwIPIRe0vfXf3hacH1+T3YNPeeKPl3nwhXDjvUjrYfxnxwT3ZpvU73HRp+RZCavItx 6PaXv206+yBuB3CCVnoIcb47vyR2Nb2XZWVPbObDxc6TE5qePiV1ZnpMYj/TAx95H61D r+NraHu2W/XNzbkKGIdvOHaAi67uytbNTIhcW3bRv2NG5BwCYbKQhBaG08+1KI9PQ97B 2Bb46qp2cdruOx9WwW8zd9JdZVFv5Lcz8YKp26hLRH8Vqc+sE808RzKcfUrm44MmBi5C dlXg== X-Gm-Message-State: AOAM533Rx5DE86DmwGVXdH/yvOIIP7QPUj3dwaylnDss5t8SUB1hdYdS X7nkXjY0Y1t4f2ZgOKle3S4SD2Tx0HZg6bfx X-Received: by 2002:a2e:2417:: with SMTP id k23mr10009497ljk.373.1607943992681; Mon, 14 Dec 2020 03:06:32 -0800 (PST) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id q19sm2092217lfa.80.2020.12.14.03.06.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Dec 2020 03:06:32 -0800 (PST) From: Sam Protsenko To: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Felipe Balbi , Greg Kroah-Hartman , John Stultz , Andy Shevchenko , Andy Shevchenko Subject: [PATCH v4 1/2] usb: dwc3: drd: Avoid error when extcon is missing Date: Mon, 14 Dec 2020 13:07:40 +0200 Message-Id: <20201214110741.8512-2-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201214110741.8512-1-semen.protsenko@linaro.org> References: <20201214110741.8512-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If "port" node is missing in PHY controller node, dwc3_get_extcon() isn't able to find extcon devices. This is perfectly fine in case when "usb-role-switch" or OTG is used, but next misleading error message is printed in that case, from of_graph_get_remote_node(): OF: graph: no port node found in /phy@1234abcd Avoid printing that message by checking if the port node exists in PHY node before calling of_graph_get_remote_node(). While at it, add the comment from mentioned code block, explaining how checking the port availability helps to avoid the misleading error. Signed-off-by: Sam Protsenko Cc: Andy Shevchenko Reviewed-by: Andy Shevchenko --- Changes in v4: - Moved the comment from patch 2/2 to 1/2 - Fixed typos in commit message and comment Changes in v3: - Split patch into two patches: logic diff and style diff drivers/usb/dwc3/drd.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) -- 2.29.2 diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 3e1c1aacf002..da428cf2eb5b 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -462,8 +462,18 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) return edev; } + /* + * Try to get an extcon device from the USB PHY controller's "port" + * node. Check if it has the "port" node first, to avoid printing the + * error message from underlying code, as it's a valid case: extcon + * device (and "port" node) may be missing in case of "usb-role-switch" + * or OTG mode. + */ np_phy = of_parse_phandle(dev->of_node, "phys", 0); - np_conn = of_graph_get_remote_node(np_phy, -1, -1); + if (of_graph_is_present(np_phy)) + np_conn = of_graph_get_remote_node(np_phy, -1, -1); + else + np_conn = NULL; if (np_conn) edev = extcon_find_edev_by_node(np_conn);