From patchwork Mon Sep 13 13:12:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 510509 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 18CCEC433EF for ; Mon, 13 Sep 2021 14:25:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04DC160F26 for ; Mon, 13 Sep 2021 14:25:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345755AbhIMO0y (ORCPT ); Mon, 13 Sep 2021 10:26:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:46952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346418AbhIMOY2 (ORCPT ); Mon, 13 Sep 2021 10:24:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 09B6E61B49; Mon, 13 Sep 2021 13:48:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631540892; bh=6WR/PA9doHS9lRfGDEn/9vjBBD+HOGYCtRs8PzhaRh8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DMQDTeg48TFJLTRYwcg8GdVPVw/BaiU+QzsMMsAwhkp7DMUsVmMHt4r7oqgOgqtYh PYJ0lsNxtpUhoeAGVG9pFutHO6Dx+bYVCaEFYAajf8i1LM1LgVWLURLVw9a8HytIzI ObotZ7erBSnd3y/kh2UPAh6yeTtBxdBowaI5o4LQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chen-Yu Tsai , Mark Brown , Sasha Levin Subject: [PATCH 5.14 078/334] regulator: vctrl: Use locked regulator_get_voltage in probe path Date: Mon, 13 Sep 2021 15:12:12 +0200 Message-Id: <20210913131116.034730973@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210913131113.390368911@linuxfoundation.org> References: <20210913131113.390368911@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chen-Yu Tsai [ Upstream commit 98e47570ba985f2310586c80409238200fa3170f ] In commit e9153311491d ("regulator: vctrl-regulator: Avoid deadlock getting and setting the voltage"), all calls to get/set the voltage of the control regulator were switched to unlocked versions to avoid deadlocks. However, the call in the probe path is done without regulator locks held. In this case the locked version should be used. Switch back to the locked regulator_get_voltage() in the probe path to avoid any mishaps. Fixes: e9153311491d ("regulator: vctrl-regulator: Avoid deadlock getting and setting the voltage") Signed-off-by: Chen-Yu Tsai Link: https://lore.kernel.org/r/20210825033704.3307263-2-wenst@chromium.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/vctrl-regulator.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/vctrl-regulator.c b/drivers/regulator/vctrl-regulator.c index cbadb1c99679..93d33201ffe0 100644 --- a/drivers/regulator/vctrl-regulator.c +++ b/drivers/regulator/vctrl-regulator.c @@ -490,7 +490,8 @@ static int vctrl_probe(struct platform_device *pdev) if (ret) return ret; - ctrl_uV = regulator_get_voltage_rdev(vctrl->ctrl_reg->rdev); + /* Use locked consumer API when not in regulator framework */ + ctrl_uV = regulator_get_voltage(vctrl->ctrl_reg); if (ctrl_uV < 0) { dev_err(&pdev->dev, "failed to get control voltage\n"); return ctrl_uV;