From patchwork Tue Aug 15 07:56:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 713923 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 B3D7EC04FDF for ; Tue, 15 Aug 2023 07:57:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235494AbjHOH4q (ORCPT ); Tue, 15 Aug 2023 03:56:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235492AbjHOH4V (ORCPT ); Tue, 15 Aug 2023 03:56:21 -0400 Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1EEC8DD; Tue, 15 Aug 2023 00:56:18 -0700 (PDT) X-IronPort-AV: E=Sophos;i="6.01,174,1684767600"; d="scan'208";a="172984486" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 15 Aug 2023 16:56:18 +0900 Received: from localhost.localdomain (unknown [10.226.92.136]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id ED7DA41822E3; Tue, 15 Aug 2023 16:56:14 +0900 (JST) From: Biju Das To: Linus Walleij Cc: Biju Das , Geert Uytterhoeven , Chris Brandt , Jacopo Mondi , linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, Fabrizio Castro , Prabhakar Mahadev Lad , stable@kernel.org Subject: [PATCH v2 3/3] pinctrl: renesas: rza2: Add lock around pinctrl_generic{{add,remove}_group,{add,remove}_function} Date: Tue, 15 Aug 2023 08:56:02 +0100 Message-Id: <20230815075602.10473-4-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230815075602.10473-1-biju.das.jz@bp.renesas.com> References: <20230815075602.10473-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The pinctrl group and function creation/remove calls expect caller to take care of locking. Add lock around these functions. Fixes: b59d0e782706 ("pinctrl: Add RZ/A2 pin and gpio controller") Cc: stable@kernel.org Signed-off-by: Biju Das --- v1->v2: * No change. --- drivers/pinctrl/renesas/pinctrl-rza2.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/renesas/pinctrl-rza2.c b/drivers/pinctrl/renesas/pinctrl-rza2.c index 0b454a31c4bd..afb595a6eb9e 100644 --- a/drivers/pinctrl/renesas/pinctrl-rza2.c +++ b/drivers/pinctrl/renesas/pinctrl-rza2.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -47,6 +48,7 @@ struct rza2_pinctrl_priv { struct pinctrl_dev *pctl; struct pinctrl_gpio_range gpio_range; int npins; + struct mutex mutex; /* serialize adding groups and functions */ }; #define RZA2_PDR(port) (0x0000 + (port) * 2) /* Direction 16-bit */ @@ -359,10 +361,13 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev, psel_val[i] = MUX_FUNC(value); } + mutex_lock(&priv->mutex); /* Register a single pin group listing all the pins we read from DT */ gsel = pinctrl_generic_add_group(pctldev, np->name, pins, npins, NULL); - if (gsel < 0) + if (gsel < 0) { + mutex_unlock(&priv->mutex); return gsel; + } /* * Register a single group function where the 'data' is an array PSEL @@ -390,6 +395,7 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev, (*map)->data.mux.group = np->name; (*map)->data.mux.function = np->name; *num_maps = 1; + mutex_unlock(&priv->mutex); return 0; @@ -398,6 +404,7 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev, remove_group: pinctrl_generic_remove_group(pctldev, gsel); + mutex_unlock(&priv->mutex); dev_err(priv->dev, "Unable to parse DT node %s\n", np->name); @@ -474,6 +481,8 @@ static int rza2_pinctrl_probe(struct platform_device *pdev) if (IS_ERR(priv->base)) return PTR_ERR(priv->base); + mutex_init(&priv->mutex); + platform_set_drvdata(pdev, priv); priv->npins = (int)(uintptr_t)of_device_get_match_data(&pdev->dev) *