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 X-Spam-Level: X-Spam-Status: No, score=-18.9 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 22302C48BE6 for ; Mon, 14 Jun 2021 10:33:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A89B61242 for ; Mon, 14 Jun 2021 10:33:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233086AbhFNKfp (ORCPT ); Mon, 14 Jun 2021 06:35:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:39738 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232746AbhFNKeF (ORCPT ); Mon, 14 Jun 2021 06:34:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 95FBA611C0; Mon, 14 Jun 2021 10:31:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623666707; bh=uH7X4E4uXYwz4moQg9ZSqhZ98whTmhNzkyKbhStAGOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mUFmhdmiXwRRKjRDoUwgEb41zURV8fKSOAzq1hbKiXOgf12sKMp5ZyYJEiUaGjoSe obG9w4BxzUQ4wKwKAKH8wuklMIoGjbPSiSUWQJVR9LpavvDNLzT0IqZaMjHJtESddZ pl2IjHa//hsiqVffAiyW19ePAP63X2g7xNNdCQ2U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Baryshkov , Mark Brown Subject: [PATCH 4.9 33/42] regulator: core: resolve supply for boot-on/always-on regulators Date: Mon, 14 Jun 2021 12:27:24 +0200 Message-Id: <20210614102643.758079144@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210614102642.700712386@linuxfoundation.org> References: <20210614102642.700712386@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: stable@vger.kernel.org From: Dmitry Baryshkov commit 98e48cd9283dbac0e1445ee780889f10b3d1db6a upstream. For the boot-on/always-on regulators the set_machine_constrainst() is called before resolving rdev->supply. Thus the code would try to enable rdev before enabling supplying regulator. Enforce resolving supply regulator before enabling rdev. Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator") Signed-off-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20210519221224.2868496-1-dmitry.baryshkov@linaro.org Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/regulator/core.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1080,6 +1080,12 @@ static int set_machine_constraints(struc * and we have control then make sure it is enabled. */ if (rdev->constraints->always_on || rdev->constraints->boot_on) { + /* If we want to enable this regulator, make sure that we know + * the supplying regulator. + */ + if (rdev->supply_name && !rdev->supply) + return -EPROBE_DEFER; + ret = _regulator_do_enable(rdev); if (ret < 0 && ret != -EINVAL) { rdev_err(rdev, "failed to enable\n");