Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753540AbbG2LKw (ORCPT ); Wed, 29 Jul 2015 07:10:52 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:59336 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751417AbbG2LKq (ORCPT ); Wed, 29 Jul 2015 07:10:46 -0400 From: Kishon Vijay Abraham I To: , , , , , , , CC: , Subject: [PATCH 07/17] mmc: host: omap_hsmmc: return error if any of the regulator APIs fail Date: Wed, 29 Jul 2015 16:39:37 +0530 Message-ID: <1438168187-1614-8-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1438168187-1614-1-git-send-email-kishon@ti.com> References: <1438168187-1614-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3092 Lines: 114 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 --- 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 7aee1a0..d308552 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -267,8 +267,11 @@ 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; } } @@ -286,23 +289,35 @@ 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; } } @@ -314,19 +329,32 @@ 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; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/