From patchwork Tue Nov 27 17:00:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Mc Guire X-Patchwork-Id: 10701069 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BADEE13AD for ; Tue, 27 Nov 2018 17:07:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9DC6A2C411 for ; Tue, 27 Nov 2018 17:07:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8EB3A2C450; Tue, 27 Nov 2018 17:07:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 37B082C411 for ; Tue, 27 Nov 2018 17:07:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=8mIKdsWXeD0uBXXHZ3eUQrC4wcoML6oqjlK+5D5fG00=; b=aE3 KpPuSibA+t/229oZ7vavIzTHlqVu5/QfW5U2zSQZGclowbxnpw6C3vEhzuwGnee1F44H4Z7x00/ee e+G9BKW41SfzG+0yzHAVe02W5Al96mq+7/fbr+Xw9CRSJ3mgZBzjGauNSI88k7bMgeCCtykbSdoIk sG2ORD5Vc//jdhAc86a2EWYKz1ofQb15b7gsosdUvBkJeGOzGa3OdW4HlavU8Ea2/4An/Rrsd1Mwd JjcIJVfa7ys9L0Bee0KaleLNvjM8os4qHEVatxvtRaKeo+Z1Vg7n3hM16Kk8D/tNjTzY2deXL7+Zz URObCbQPsMMx5tZH0cJncDoEt0PJ8vQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gRgps-0005tE-P7; Tue, 27 Nov 2018 17:07:44 +0000 Received: from www.osadl.org ([62.245.132.105]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gRgpo-0005sA-HE; Tue, 27 Nov 2018 17:07:42 +0000 Received: from debian01.hofrr.at (178.115.242.59.static.drei.at [178.115.242.59]) by www.osadl.org (8.13.8/8.13.8/OSADL-2007092901) with ESMTP id wARH3GeS004498; Tue, 27 Nov 2018 18:03:16 +0100 From: Nicholas Mc Guire To: Linus Walleij Subject: [PATCH V2] gpio: mt7621: pass mediatek_gpio_bank_probe() failure up the stack Date: Tue, 27 Nov 2018 18:00:18 +0100 Message-Id: <1543338018-708-1-git-send-email-hofrat@osadl.org> X-Mailer: git-send-email 2.1.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181127_090740_929364_A83F164D X-CRM114-Status: GOOD ( 11.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sergio Paracuellos , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski , linux-mediatek@lists.infradead.org, Nicholas Mc Guire , Matthias Brugger , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The error cases of mediatek_gpio_bank_probe() would go unnoticed (except for the dev_err() messages). The probe function should return an error if one of the banks failed to initialize properly indicated by not returning non-0. Signed-off-by: Nicholas Mc Guire Fixes: 4ba9c3afda41 ("gpio: mt7621: Add a driver for MT7621") Acked-by: Sean Wang --- V2: A logic error spoted by Sean Wang the success case is 0 and thus returning early should be on on ret!=0 and not on !ret - thanks for catching this stupid mistake ! Patch was compile tested with: omega2p_defconfig, SOC_MT7621=y, GPIOLIB=y, GPIO_MT7621=y 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 = dev->of_node; struct mtk *mtk; int i; + int ret; mtk = 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 = dev_name(dev); - for (i = 0; i < MTK_BANK_CNT; i++) - mediatek_gpio_bank_probe(dev, np, i); + for (i = 0; i < MTK_BANK_CNT; i++) { + ret = mediatek_gpio_bank_probe(dev, np, i); + if (ret) + return ret; + } return 0; }