From patchwork Tue Mar 17 10:55:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 229233 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 6CE29C18E5B for ; Tue, 17 Mar 2020 11:18:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 44B0A206EC for ; Tue, 17 Mar 2020 11:18:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584443896; bh=b+dT2WJfsjgAtzNNSBjjsrruhNxhdxhBaqv0UWRxRRY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aWg08uY4YP0E+Z1h+hjgBJLHBBNEeAWVD17vkhxvbCsObiRj1kgvKn+CIyRLU7zrT pPmvYnrFqz6JybEegq/plJaL5eu9//hSQ9jtLIXvky8xY0H1qP7xKyrGhWD3CHQIjP trGvscGhGBAVXp/iSUP1VRl0TzHgEVsg8l06wH1I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728638AbgCQLGi (ORCPT ); Tue, 17 Mar 2020 07:06:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:47996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728098AbgCQLGh (ORCPT ); Tue, 17 Mar 2020 07:06:37 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C201C20658; Tue, 17 Mar 2020 11:06:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584443197; bh=b+dT2WJfsjgAtzNNSBjjsrruhNxhdxhBaqv0UWRxRRY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nYyjoSpGI/Vonaxr8DxZ+VV3mOKFdm90/FqX46oRqY3Wka/M7FKb/Cr5Ry7z2vjS6 ZVE6J9Lxsg4XJ6g7dy+gLtj0XW4z7jsM1Hz8ZWX+Eojzxos2oqRc+yjjlAIQRhkSjD Cn/RUGe2+zKmG7OaFzZylpI311x0xnnTQ2ylUrI0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Geert Uytterhoeven , Wolfram Sang , Andy Shevchenko , Mika Westerberg , Wolfram Sang Subject: [PATCH 5.4 119/123] i2c: acpi: put device when verifying client fails Date: Tue, 17 Mar 2020 11:55:46 +0100 Message-Id: <20200317103319.462938562@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200317103307.343627747@linuxfoundation.org> References: <20200317103307.343627747@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wolfram Sang commit 8daee952b4389729358665fb91949460641659d4 upstream. i2c_verify_client() can fail, so we need to put the device when that happens. Fixes: 525e6fabeae2 ("i2c / ACPI: add support for ACPI reconfigure notifications") Reported-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang Reviewed-by: Geert Uytterhoeven Reviewed-by: Andy Shevchenko Acked-by: Mika Westerberg Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/i2c-core-acpi.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -394,9 +394,17 @@ EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_ static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev) { struct device *dev; + struct i2c_client *client; dev = bus_find_device_by_acpi_dev(&i2c_bus_type, adev); - return dev ? i2c_verify_client(dev) : NULL; + if (!dev) + return NULL; + + client = i2c_verify_client(dev); + if (!client) + put_device(dev); + + return client; } static int i2c_acpi_notify(struct notifier_block *nb, unsigned long value,