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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5E30AC10F14 for ; Sun, 6 Oct 2019 17:26:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2D3FC217F9 for ; Sun, 6 Oct 2019 17:26:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382806; bh=Ul1IQzv9UVldGMU3yhp2umsQMRA6lOxZbadI+W5eHfI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hYOzO0UQtX0+7FkU0JIrIG3Y/JHTjVwb9F5jvQpz12B2Vb6PdTnrypxsQu6x1hX38 ItjN5jFvfsaxPFkNSF3h/bz44kpSAOJpELE7QN9OiKWejhukg2ShTCaAhbcA1R6ktY Mhl4gur3tQtgUucwCrJEEwvthvx4aUORjAuucDU4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728333AbfJFR0p (ORCPT ); Sun, 6 Oct 2019 13:26:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:51916 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728329AbfJFR0k (ORCPT ); Sun, 6 Oct 2019 13:26:40 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A4B8C2133F; Sun, 6 Oct 2019 17:26:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382800; bh=Ul1IQzv9UVldGMU3yhp2umsQMRA6lOxZbadI+W5eHfI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gX4OoC8aFenJeKTeIwOJCWA/LKVAsYa9hOYm+8z9b2+7hU665UlpJ5TeAYUriapQS M86Xae3RlMYjePsgMtmxvNfcjCUR1JykTH97fdrM/zCH6nNgeXhXqsFzElPs3MlSXJ KjJQfo1/g+CpXeHnWA47xG34zLjuGkffdW8vmaa4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Heiko Stuebner , Thierry Reding , Lorenzo Pieralisi , Andrew Murray , Shawn Lin , linux-rockchip@lists.infradead.org, Sasha Levin Subject: [PATCH 4.14 37/68] PCI: rockchip: Propagate errors for optional regulators Date: Sun, 6 Oct 2019 19:21:13 +0200 Message-Id: <20191006171126.183069965@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171108.150129403@linuxfoundation.org> References: <20191006171108.150129403@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thierry Reding [ Upstream commit 0e3ff0ac5f71bdb6be2a698de0ed0c7e6e738269 ] regulator_get_optional() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate data structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "regulator not specified in DT". What we really want is to ignore the optional regulators only if they have not been specified in DT. regulator_get_optional() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Tested-by: Heiko Stuebner Signed-off-by: Thierry Reding Signed-off-by: Lorenzo Pieralisi Reviewed-by: Andrew Murray Reviewed-by: Heiko Stuebner Acked-by: Shawn Lin Cc: Shawn Lin Cc: Heiko Stuebner Cc: linux-rockchip@lists.infradead.org Signed-off-by: Sasha Levin --- drivers/pci/host/pcie-rockchip.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 9051c6c8fea49..d3f9e7d247275 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -1129,29 +1129,29 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v"); if (IS_ERR(rockchip->vpcie12v)) { - if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (PTR_ERR(rockchip->vpcie12v) != -ENODEV) + return PTR_ERR(rockchip->vpcie12v); dev_info(dev, "no vpcie12v regulator found\n"); } rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3"); if (IS_ERR(rockchip->vpcie3v3)) { - if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (PTR_ERR(rockchip->vpcie3v3) != -ENODEV) + return PTR_ERR(rockchip->vpcie3v3); dev_info(dev, "no vpcie3v3 regulator found\n"); } rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8"); if (IS_ERR(rockchip->vpcie1v8)) { - if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (PTR_ERR(rockchip->vpcie1v8) != -ENODEV) + return PTR_ERR(rockchip->vpcie1v8); dev_info(dev, "no vpcie1v8 regulator found\n"); } rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9"); if (IS_ERR(rockchip->vpcie0v9)) { - if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (PTR_ERR(rockchip->vpcie0v9) != -ENODEV) + return PTR_ERR(rockchip->vpcie0v9); dev_info(dev, "no vpcie0v9 regulator found\n"); } -- 2.20.1