ARM: 7714/1: mmc: mmci: Ensure return value of regulator_enable() is checked

This patch suppresses the warning below:

drivers/mmc/host/mmci.c: In function ‘mmci_set_ios’:
drivers/mmc/host/mmci.c:1165:20: warning: ignoring return value of
        ‘regulator_enable’, declared with attribute warn_unused_result
        [-Wunused-result]

Cc: Chris Ball <cjb@laptop.org>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 375c109607ff..f4f3038c1df0 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1130,6 +1130,7 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
         struct variant_data *variant = host->variant;
         u32 pwr = 0;
         unsigned long flags;
+        int ret;
 
         pm_runtime_get_sync(mmc_dev(mmc));
 
@@ -1161,8 +1162,12 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                 break;
         case MMC_POWER_ON:
                 if (!IS_ERR(mmc->supply.vqmmc) &&
-                    !regulator_is_enabled(mmc->supply.vqmmc))
-                        regulator_enable(mmc->supply.vqmmc);
+                    !regulator_is_enabled(mmc->supply.vqmmc)) {
+                        ret = regulator_enable(mmc->supply.vqmmc);
+                        if (ret < 0)
+                                dev_err(mmc_dev(mmc),
+                                        "failed to enable vqmmc regulator\n");
+                }
 
                 pwr |= MCI_PWR_ON;
                 break;