Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp429413imu; Tue, 27 Nov 2018 00:34:52 -0800 (PST) X-Google-Smtp-Source: AFSGD/VqPgItAY5hhlsqqJubSABINPaeu39+jSBeRJOGaBsgu65WKezcZ+9eWqjYReLWRHQOBmPL X-Received: by 2002:a17:902:848d:: with SMTP id c13mr21447695plo.257.1543307692764; Tue, 27 Nov 2018 00:34:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1543307692; cv=none; d=google.com; s=arc-20160816; b=NRnA+Y5+yphm+BjOzDVaM89Q96+wrqBhhv/ifpwGubxx1/wwiVUof+xZgJ2keLW/sd dk0lEfBQAG/yis5Ilm8/I2PtsXklaMREl8Kt31wGo49bGI/pzxoQgK+iwTsrHzqkyOft 0DK841q2qgp35u3M66fyqssZ8RZKIrSSivCkkyDzmOA5MtdV2yH4c/YSGgL0/hfm5zqg ZfRa4xzlDoloNBvvzljtz8Y5ApP2DKtZhQeJHmwEb3csACx2JA3e4sC7dlRTi8m+Zw5P ZMysDcvuXhUvy2YSnZULgbJrnVZjGroiGDUtORuv57DWurUVyhnv0DMmveJypfvxWHzr F9Ew== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:cc:to:subject :message-id:date:from:in-reply-to:references:mime-version :dkim-signature; bh=FSd6hxD7qn3VMjl/8wg68VwbhebGJwS4Y/mbCQVYFYI=; b=m4ExWhox/UApRhRHmI/Sa9W5hRliXcstdine2RQN0zGaUr2x58+Jd4t1hYJkPVAgrM ZscLkAbJ3fPBD8QsOqQM2oMUJZLF+CXkiL6f0E/L0rghEhYl+k7OAsN8e3dcldzEQj2s e/GAPyFDswiFpvOC9sxZCposhbhU2rztPPrVF1OTSbRAntpibluf5HcSC2uqhzfSBP9B C9S6oTh9Nl9ATsNN+C57TCAOSyrhVceK29+T4tjxXeD3sqaHjd6WDrhCaaKyi1O0QOzH FkOp+XYJhvxpta1z18mj6Rt/RMCvtnwpkNfkQcFWFReZUuPeC3Gcl6F1VZgI+hfC5FvV ctuQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=bckujwls; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l33si3487514pld.142.2018.11.27.00.34.37; Tue, 27 Nov 2018 00:34:52 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=bckujwls; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729396AbeK0TaT (ORCPT + 99 others); Tue, 27 Nov 2018 14:30:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:48916 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728882AbeK0TaT (ORCPT ); Tue, 27 Nov 2018 14:30:19 -0500 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 35B4D21104; Tue, 27 Nov 2018 08:33:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543307591; bh=WTn/PEg7Cobmk7UGEl8NGRz45ym8LTYqnKjotzR+tl8=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=bckujwls8zO91802Qpj1XPFIww+qeIIPps8SjI2NOyzkYdylYDR0As7v6e5WKlf3i JhLALYi7id8hdwUmPVgGFo06s8YK5QC5E03kmCJtIgJNkQKmgtJOsYmlH+kSfIqzpz 1+Y2ZStA1+M9aoAI2lp9rmdnYQsMDiimiXrHGgH0= Received: by mail-wm1-f46.google.com with SMTP id c126so21132236wmh.0; Tue, 27 Nov 2018 00:33:11 -0800 (PST) X-Gm-Message-State: AA+aEWb156iOR02ULtNDCXfEle7McfogNWUZzn50bDk61FR/lVfnPf3M WzCzs5zdrKpvjo60ZhaEOo4UHebvLlaD/VqKFTg= X-Received: by 2002:a1c:2c56:: with SMTP id s83mr955660wms.48.1543307589639; Tue, 27 Nov 2018 00:33:09 -0800 (PST) MIME-Version: 1.0 References: <1542823573-20228-1-git-send-email-hofrat@osadl.org> <1542823573-20228-2-git-send-email-hofrat@osadl.org> <20181127080113.GA2426@osadl.at> In-Reply-To: <20181127080113.GA2426@osadl.at> From: Sean Wang Date: Tue, 27 Nov 2018 00:32:59 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 2/2] gpio: mt7621: pass mediatek_gpio_bank_probe() failure up the stack To: der.herr@hofr.at Cc: bgolaszewski@baylibre.com, Linus Walleij , linux-kernel@vger.kernel.org, sergio.paracuellos@gmail.com, linux-mediatek@lists.infradead.org, linux-gpio@vger.kernel.org, hofrat@osadl.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > On Mon, Nov 26, 2018 at 11:49:26PM -0800, Sean Wang wrote: > > Nicholas Mc Guire ??? 2018???11???21??? ?????? ?????= ?10:13????????? > > > > > > The error cases of mediatek_gpio_bank_probe() would go unnoticed (exc= ept > > > for the dev_err() messages). The probe function should return an erro= r > > > if one of the banks failed to initialize properly. > > > > > > Signed-off-by: Nicholas Mc Guire > > > Fixes: 4ba9c3afda41 ("gpio: mt7621: Add a driver for MT7621") > > > --- > > > > > > Patch was compile tested with: omega2p_defconfig, SOC_MT7621=3Dy, > > > GPIOLIB=3Dy, GPIO_MT7621=3Dy > > > > > > Patch is against 4.20-rc3 (localversion-next is next-20181121) > > > > > > drivers/gpio/gpio-mt7621.c | 8 ++++++-- > > > 1 file changed, 6 insertions(+), 2 deletions(-) > > > > > > diff --git a/drivers/gpio/gpio-mt7621.c b/drivers/gpio/gpio-mt7621.c > > > index 1ec95bc..68fca8b 100644 > > > --- a/drivers/gpio/gpio-mt7621.c > > > +++ b/drivers/gpio/gpio-mt7621.c > > > @@ -297,6 +297,7 @@ mediatek_gpio_probe(struct platform_device *pdev) > > > struct device_node *np =3D dev->of_node; > > > struct mtk *mtk; > > > int i; > > > + int ret; > > > > > > mtk =3D devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL); > > > if (!mtk) > > > @@ -311,8 +312,11 @@ mediatek_gpio_probe(struct platform_device *pdev= ) > > > platform_set_drvdata(pdev, mtk); > > > mediatek_gpio_irq_chip.name =3D dev_name(dev); > > > > > > - for (i =3D 0; i < MTK_BANK_CNT; i++) > > > - mediatek_gpio_bank_probe(dev, np, i); > > > + for (i =3D 0; i < MTK_BANK_CNT; i++) { > > > + ret =3D mediatek_gpio_bank_probe(dev, np, i); > > > + if (!ret) > > > > it should be if (ret < 0) ? > > I don=C2=B4t think so mediatek_gpio_bank_probe() returns 0 on success > and all other returns are error paths - while the current code > only returns negative values I do thik that any non 0 would be > an error indication so !ret should be fine here. > !0 would be true > thx! > hofrat > > > > > > + return ret; > > > + } > > > > > > return 0; > > > } > > > -- > > > 2.1.4 > > > > > > > > > _______________________________________________ > > > Linux-mediatek mailing list > > > Linux-mediatek@lists.infradead.org > > > http://lists.infradead.org/mailman/listinfo/linux-mediatek > > _______________________________________________ > Linux-mediatek mailing list > Linux-mediatek@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-mediatek