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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F34BCCA494 for ; Tue, 7 Jun 2022 17:52:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349585AbiFGRvX (ORCPT ); Tue, 7 Jun 2022 13:51:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347056AbiFGReW (ORCPT ); Tue, 7 Jun 2022 13:34:22 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41F98109180; Tue, 7 Jun 2022 10:30:32 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DECA3614B5; Tue, 7 Jun 2022 17:30:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAE5DC34119; Tue, 7 Jun 2022 17:30:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654623030; bh=tG1zL6GalKriyQc71pB4vzEjNZy47Fpf0YjX5DFgr5g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g9I4vEx/1JKOnMcAxv0TsE//wqU0o4BhxYkhYTeC3ts3x0+d4PHVnjfusEh//MpxC zYAWdxyWNV3tbd/T3NQV1B8UsfnBZAhBKeOsgSjVm+cyNdR2t0xb7KmWkmLEO4CiHi BfcLGDCHqGKge3ozOOrqe3r6R9mMcJF716OmvHPE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Prashant Malani , Tzung-Bi Shih , Sasha Levin Subject: [PATCH 5.10 270/452] platform/chrome: cros_ec: fix error handling in cros_ec_register() Date: Tue, 7 Jun 2022 19:02:07 +0200 Message-Id: <20220607164916.597407000@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607164908.521895282@linuxfoundation.org> References: <20220607164908.521895282@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tzung-Bi Shih [ Upstream commit 2cd01bd6b117df07b1bc2852f08694fdd29e40ed ] Fix cros_ec_register() to unregister platform devices if blocking_notifier_chain_register() fails. Also use the single exit path to handle the platform device unregistration. Fixes: 42cd0ab476e2 ("platform/chrome: cros_ec: Query EC protocol version if EC transitions between RO/RW") Reviewed-by: Prashant Malani Signed-off-by: Tzung-Bi Shih Signed-off-by: Sasha Levin --- drivers/platform/chrome/cros_ec.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c index 3104680b7485..979f92194e81 100644 --- a/drivers/platform/chrome/cros_ec.c +++ b/drivers/platform/chrome/cros_ec.c @@ -175,6 +175,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev) ec_dev->max_request = sizeof(struct ec_params_hello); ec_dev->max_response = sizeof(struct ec_response_get_protocol_info); ec_dev->max_passthru = 0; + ec_dev->ec = NULL; + ec_dev->pd = NULL; ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL); if (!ec_dev->din) @@ -231,18 +233,16 @@ int cros_ec_register(struct cros_ec_device *ec_dev) if (IS_ERR(ec_dev->pd)) { dev_err(ec_dev->dev, "Failed to create CrOS PD platform device\n"); - platform_device_unregister(ec_dev->ec); - return PTR_ERR(ec_dev->pd); + err = PTR_ERR(ec_dev->pd); + goto exit; } } if (IS_ENABLED(CONFIG_OF) && dev->of_node) { err = devm_of_platform_populate(dev); if (err) { - platform_device_unregister(ec_dev->pd); - platform_device_unregister(ec_dev->ec); dev_err(dev, "Failed to register sub-devices\n"); - return err; + goto exit; } } @@ -264,12 +264,16 @@ int cros_ec_register(struct cros_ec_device *ec_dev) err = blocking_notifier_chain_register(&ec_dev->event_notifier, &ec_dev->notifier_ready); if (err) - return err; + goto exit; } dev_info(dev, "Chrome EC device registered\n"); return 0; +exit: + platform_device_unregister(ec_dev->ec); + platform_device_unregister(ec_dev->pd); + return err; } EXPORT_SYMBOL(cros_ec_register); -- 2.35.1