From patchwork Thu Aug 27 09:13:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 7082341 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 82AFDBEEC1 for ; Thu, 27 Aug 2015 09:17:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9743A20998 for ; Thu, 27 Aug 2015 09:17:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD4E620657 for ; Thu, 27 Aug 2015 09:17:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752479AbbH0JOi (ORCPT ); Thu, 27 Aug 2015 05:14:38 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:46536 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752327AbbH0JOg (ORCPT ); Thu, 27 Aug 2015 05:14:36 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id t7R9EWkI031238; Thu, 27 Aug 2015 04:14:32 -0500 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7R9EWV0020754; Thu, 27 Aug 2015 04:14:32 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.224.2; Thu, 27 Aug 2015 04:14:32 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7R9E7aT004649; Thu, 27 Aug 2015 04:14:29 -0500 From: Kishon Vijay Abraham I To: , , , , , , CC: , Subject: [PATCH v3 07/15] mmc: host: omap_hsmmc: return error if any of the regulator APIs fail Date: Thu, 27 Aug 2015 14:43:59 +0530 Message-ID: <1440666847-12594-8-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1440666847-12594-1-git-send-email-kishon@ti.com> References: <1440666847-12594-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Return error if any of the regulator APIs (regulator_enable, regulator_disable, regulator_set_voltage) fails in omap_hsmmc_set_power to avoid undefined behavior. Signed-off-by: Kishon Vijay Abraham I Tested-by: Tony Lindgren --- drivers/mmc/host/omap_hsmmc.c | 52 +++++++++++++++++++++++++++++++---------- 1 file changed, 40 insertions(+), 12 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index c4c284e..284ab00 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -269,8 +269,11 @@ static int omap_hsmmc_set_power(struct device *dev, int power_on, int vdd) if (host->pbias) { if (host->pbias_enabled == 1) { ret = regulator_disable(host->pbias); - if (!ret) - host->pbias_enabled = 0; + if (ret) { + dev_err(dev, "pbias reg disable failed\n"); + return ret; + } + host->pbias_enabled = 0; } } @@ -288,23 +291,35 @@ static int omap_hsmmc_set_power(struct device *dev, int power_on, int vdd) * chips/cards need an interface voltage rail too. */ if (power_on) { - if (mmc->supply.vmmc) + if (mmc->supply.vmmc) { ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + if (ret) + return ret; + } + /* Enable interface voltage rail, if needed */ - if (ret == 0 && mmc->supply.vqmmc) { + if (mmc->supply.vqmmc) { ret = regulator_enable(mmc->supply.vqmmc); - if (ret < 0 && mmc->supply.vmmc) - ret = mmc_regulator_set_ocr(mmc, - mmc->supply.vmmc, - 0); + if (ret) { + dev_err(dev, "vmmc_aux reg enable failed\n"); + goto err_set_vqmmc; + } } } else { /* Shut down the rail */ - if (mmc->supply.vqmmc) + if (mmc->supply.vqmmc) { ret = regulator_disable(mmc->supply.vqmmc); + if (ret) { + dev_err(dev, "vmmc_aux reg disable failed\n"); + return ret; + } + } + if (mmc->supply.vmmc) { /* Then proceed to shut down the local regulator */ ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + if (ret) + return ret; } } @@ -316,19 +331,32 @@ static int omap_hsmmc_set_power(struct device *dev, int power_on, int vdd) ret = regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0); if (ret < 0) - goto error_set_power; + goto err_set_voltage; if (host->pbias_enabled == 0) { ret = regulator_enable(host->pbias); - if (!ret) + if (ret) { + dev_err(dev, "pbias reg enable failed\n"); + goto err_set_voltage; + } else { host->pbias_enabled = 1; + } } } if (mmc_pdata(host)->after_set_reg) mmc_pdata(host)->after_set_reg(dev, power_on, vdd); -error_set_power: + return 0; + +err_set_voltage: + if (mmc->supply.vqmmc) + regulator_disable(mmc->supply.vqmmc); + +err_set_vqmmc: + if (mmc->supply.vmmc) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + return ret; }