From patchwork Tue Apr 5 07:16:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557725 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 CFBA0C43217 for ; Tue, 5 Apr 2022 09:08:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236673AbiDEJD0 (ORCPT ); Tue, 5 Apr 2022 05:03:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240299AbiDEIp5 (ORCPT ); Tue, 5 Apr 2022 04:45:57 -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 331E123BF3; Tue, 5 Apr 2022 01:36:14 -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 8EDFE6153B; Tue, 5 Apr 2022 08:36:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F5F7C385A1; Tue, 5 Apr 2022 08:36:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649147770; bh=GrLKfpMAhDiFsA9sctGu5r6LDF039bw7+aj2UbXwqKE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q5l1loYzMIHUPG0nQ/bbekzbwJW8T4oFYDOi71aLbjJUhxbB9TJRnQDCLaQpk6nf5 aX4ZEc0ivjug0SfvwtvOyR02m5h8K49u52fiLq80lCDiA9H5QMwk7xxicaNfaM/427 h7csowUrzfDHw4emQVSGpP/9n1tZx5t0qHP8IbLU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Krzysztof Kozlowski , Sam Protsenko , Chanho Park Subject: [PATCH 5.16 0076/1017] pinctrl: samsung: drop pin banks references on error paths Date: Tue, 5 Apr 2022 09:16:29 +0200 Message-Id: <20220405070356.446505040@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070354.155796697@linuxfoundation.org> References: <20220405070354.155796697@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Krzysztof Kozlowski commit 50ebd19e3585b9792e994cfa8cbee8947fe06371 upstream. The driver iterates over its devicetree children with for_each_child_of_node() and stores for later found node pointer. This has to be put in error paths to avoid leak during re-probing. Fixes: ab663789d697 ("pinctrl: samsung: Match pin banks with their device nodes") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Sam Protsenko Reviewed-by: Chanho Park Link: https://lore.kernel.org/r/20220111201426.326777-2-krzysztof.kozlowski@canonical.com Signed-off-by: Greg Kroah-Hartman --- drivers/pinctrl/samsung/pinctrl-samsung.c | 30 +++++++++++++++++++++++------- 1 file changed, 23 insertions(+), 7 deletions(-) --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -1002,6 +1002,16 @@ samsung_pinctrl_get_soc_data_for_of_alia return &(of_data->ctrl[id]); } +static void samsung_banks_of_node_put(struct samsung_pinctrl_drv_data *d) +{ + struct samsung_pin_bank *bank; + unsigned int i; + + bank = d->pin_banks; + for (i = 0; i < d->nr_banks; ++i, ++bank) + of_node_put(bank->of_node); +} + /* retrieve the soc specific data */ static const struct samsung_pin_ctrl * samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, @@ -1116,19 +1126,19 @@ static int samsung_pinctrl_probe(struct if (ctrl->retention_data) { drvdata->retention_ctrl = ctrl->retention_data->init(drvdata, ctrl->retention_data); - if (IS_ERR(drvdata->retention_ctrl)) - return PTR_ERR(drvdata->retention_ctrl); + if (IS_ERR(drvdata->retention_ctrl)) { + ret = PTR_ERR(drvdata->retention_ctrl); + goto err_put_banks; + } } ret = samsung_pinctrl_register(pdev, drvdata); if (ret) - return ret; + goto err_put_banks; ret = samsung_gpiolib_register(pdev, drvdata); - if (ret) { - samsung_pinctrl_unregister(pdev, drvdata); - return ret; - } + if (ret) + goto err_unregister; if (ctrl->eint_gpio_init) ctrl->eint_gpio_init(drvdata); @@ -1138,6 +1148,12 @@ static int samsung_pinctrl_probe(struct platform_set_drvdata(pdev, drvdata); return 0; + +err_unregister: + samsung_pinctrl_unregister(pdev, drvdata); +err_put_banks: + samsung_banks_of_node_put(drvdata); + return ret; } /*