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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 C9DFCC11D09 for ; Thu, 20 Feb 2020 12:05:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A22B224656 for ; Thu, 20 Feb 2020 12:05:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="x63miHRi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727898AbgBTMFz (ORCPT ); Thu, 20 Feb 2020 07:05:55 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:40852 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727868AbgBTMFx (ORCPT ); Thu, 20 Feb 2020 07:05:53 -0500 Received: by mail-wr1-f65.google.com with SMTP id t3so4312823wru.7 for ; Thu, 20 Feb 2020 04:05:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=Z0vvlPPE+vtUh7ARyCdvaIb9a1HOM3y7M504uXCh/wc=; b=x63miHRikl8gYWEUkXxSkAwph1c9LntSaX7SnxaRAWsno52GtGklGstN18OM8xPQWs lYueTvr3Dzz87f+dW2+FqRwnFFLzFc+wqP3wSr0rzhThXZBqshbtHsgKCAvZIQ05ok/n 6IjcQbtM2uCd9/nBUu/v1DHfGLIpjgb7l8cZi5BgzU6NXF+ZNuzIGdfHImVXm3Ud1LXN mAaqjrKFx7tpIUieP0R5STbF/SlwocIr9iBl5pNdBLEFZPDH7Z/FsJssZmVBBQlEy0Ob eKJKhWEFYR8GLgB4LPkBeYNQIT+tDsbXY/90sel+i3OWViAIZm+IGCDsiyV4AJy+bsvx 3Yyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Z0vvlPPE+vtUh7ARyCdvaIb9a1HOM3y7M504uXCh/wc=; b=BphWawpVShn5siqqbABBsyL+u+YWTVKA8dvFvT9M549i2tphxzj+DF/ltGAScrskPC PUQSMJdbFLBvazHTL9NiAEXYMqeSpC8UkEieiZ45B+v0ksNzNlLSuCVS8PG59KafCZp9 xGJMROEKMoPWrt6uvkXM0PySH7eBfXeNKTgHT75egg69uGMo9ZUaeo99z+CyWDrcUe1t Z6gg2en8AwAgN7DjjI2bgDP3GYCbGi3whSbD/jP5d6pOoYop53dJWAs3bKw1zbHdGmEX Mjuj3Tvqik7bAciCvOoSjDv3die8oHZZoHXAWn4jc1KnhZPMvvNVufkyA6a2NGi5ILQ7 G5fw== X-Gm-Message-State: APjAAAWgRuUR3WQCSJp9AKHgvz06+lM77Ji5DtslRJC0ue9JdaCqRDrm KBXQ1HdxChoFe6NrxSIpjebRlg== X-Google-Smtp-Source: APXvYqyB+oY/ge35t24bXWV6fvPSUKYqtt6iPcklGzSbb5LpcwrwIDdwymH2LuyKdlA9YKxVNh/WsQ== X-Received: by 2002:adf:ec0d:: with SMTP id x13mr41779387wrn.400.1582200350410; Thu, 20 Feb 2020 04:05:50 -0800 (PST) Received: from [192.168.86.34] (cpc89974-aztw32-2-0-cust43.18-1.cable.virginm.net. [86.30.250.44]) by smtp.googlemail.com with ESMTPSA id v16sm4084878wml.11.2020.02.20.04.05.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Feb 2020 04:05:49 -0800 (PST) Subject: Re: [PATCH v4 2/4] gpiolib: use kref in gpio_desc To: Bartosz Golaszewski , Linus Walleij , Khouloud Touil , Geert Uytterhoeven Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski References: <20200220100141.5905-1-brgl@bgdev.pl> <20200220100141.5905-3-brgl@bgdev.pl> From: Srinivas Kandagatla Message-ID: <5970b17a-b29b-154f-033e-6da007d6a289@linaro.org> Date: Thu, 20 Feb 2020 12:05:48 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20200220100141.5905-3-brgl@bgdev.pl> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On 20/02/2020 10:01, Bartosz Golaszewski wrote: > --- a/drivers/gpio/gpiolib.c > +++ b/drivers/gpio/gpiolib.c > @@ -2798,6 +2798,8 @@ static int gpiod_request_commit(struct gpio_desc *desc, const char *label) > goto done; > } > > + kref_init(&desc->ref); > + Should we not decrement refcount on the error path of this function? --srini > if (chip->request) { > /* chip->request may sleep */ > spin_unlock_irqrestore(&gpio_lock, flags); > @@ -2933,6 +2935,13 @@ void gpiod_free(struct gpio_desc *desc) > } > }