mmc: host: omap_hsmmc: Do not initialize MMC regulators to NULL on error

Do not initialize MMC regulators to NULL on error in omap_hsmmc driver
similar to what is done in mmc_regulator_get_supply(). This is in
preparation for using mmc_regulator_get_supply() to get MMC
regulators.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 8c39dcc..de82ac0 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -250,14 +250,14 @@ static int omap_hsmmc_enable_supply(struct mmc_host *mmc)
        struct omap_hsmmc_host *host = mmc_priv(mmc);
        struct mmc_ios *ios = &mmc->ios;
 
-       if (mmc->supply.vmmc) {
+       if (!IS_ERR(mmc->supply.vmmc)) {
                ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
                if (ret)
                        return ret;
        }
 
        /* Enable interface voltage rail, if needed */
-       if (mmc->supply.vqmmc && !host->vqmmc_enabled) {
+       if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
                ret = regulator_enable(mmc->supply.vqmmc);
                if (ret) {
                        dev_err(mmc_dev(mmc), "vmmc_aux reg enable failed\n");
@@ -269,7 +269,7 @@ static int omap_hsmmc_enable_supply(struct mmc_host *mmc)
        return 0;
 
 err_vqmmc:
-       if (mmc->supply.vmmc)
+       if (!IS_ERR(mmc->supply.vmmc))
                mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
 
        return ret;
@@ -281,7 +281,7 @@ static int omap_hsmmc_disable_supply(struct mmc_host *mmc)
        int status;
        struct omap_hsmmc_host *host = mmc_priv(mmc);
 
-       if (mmc->supply.vqmmc && host->vqmmc_enabled) {
+       if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
                ret = regulator_disable(mmc->supply.vqmmc);
                if (ret) {
                        dev_err(mmc_dev(mmc), "vmmc_aux reg disable failed\n");
@@ -290,7 +290,7 @@ static int omap_hsmmc_disable_supply(struct mmc_host *mmc)
                host->vqmmc_enabled = 0;
        }
 
-       if (mmc->supply.vmmc) {
+       if (!IS_ERR(mmc->supply.vmmc)) {
                ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
                if (ret)
                        goto err_set_ocr;
@@ -299,7 +299,7 @@ static int omap_hsmmc_disable_supply(struct mmc_host *mmc)
        return 0;
 
 err_set_ocr:
-       if (mmc->supply.vqmmc) {
+       if (!IS_ERR(mmc->supply.vqmmc)) {
                status = regulator_enable(mmc->supply.vqmmc);
                if (status)
                        dev_err(mmc_dev(mmc), "vmmc_aux re-enable failed\n");
@@ -313,7 +313,7 @@ static int omap_hsmmc_set_pbias(struct omap_hsmmc_host *host, bool power_on,
 {
        int ret;
 
-       if (!host->pbias)
+       if (IS_ERR(host->pbias))
                return 0;
 
        if (power_on) {
@@ -363,7 +363,7 @@ static int omap_hsmmc_set_power(struct omap_hsmmc_host *host, int power_on,
         * If we don't see a Vcc regulator, assume it's a fixed
         * voltage always-on regulator.
         */
-       if (!mmc->supply.vmmc)
+       if (IS_ERR(mmc->supply.vmmc))
                return 0;
 
        if (mmc_pdata(host)->before_set_reg)
@@ -415,7 +415,7 @@ static int omap_hsmmc_disable_boot_regulator(struct regulator *reg)
 {
        int ret;
 
-       if (!reg)
+       if (IS_ERR(reg))
                return 0;
 
        if (regulator_is_enabled(reg)) {
@@ -480,7 +480,6 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
                        return ret;
                dev_dbg(host->dev, "unable to get vmmc regulator %ld\n",
                        PTR_ERR(mmc->supply.vmmc));
-               mmc->supply.vmmc = NULL;
        } else {
                ocr_value = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
                if (ocr_value > 0)
@@ -495,7 +494,6 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
                        return ret;
                dev_dbg(host->dev, "unable to get vmmc_aux regulator %ld\n",
                        PTR_ERR(mmc->supply.vqmmc));
-               mmc->supply.vqmmc = NULL;
        }
 
        host->pbias = devm_regulator_get_optional(host->dev, "pbias");
@@ -508,7 +506,6 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
                }
                dev_dbg(host->dev, "unable to get pbias regulator %ld\n",
                        PTR_ERR(host->pbias));
-               host->pbias = NULL;
        }
 
        /* For eMMC do not power off when not in sleep state */