mmc: sdhci: Don't ignore regulator_enable() return value

Fixes:
/git/arm-soc/drivers/mmc/host/sdhci.c: In function 'sdhci_add_host':
/git/arm-soc/drivers/mmc/host/sdhci.c:2910:19: warning: ignoring
return value of 'regulator_enable', declared with attribute
warn_unused_result [-Wunused-result]

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 81d52942677c7ab057160234fe7cfd479a33ea95..2ea429c2771465070cbae9f921995cd8c221fef5 100644 (file)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2939,12 +2939,17 @@ int sdhci_add_host(struct sdhci_host *host)
                        host->vqmmc = NULL;
                }
        } else {
-               regulator_enable(host->vqmmc);
+               ret = regulator_enable(host->vqmmc);
                if (!regulator_is_supported_voltage(host->vqmmc, 1700000,
                        1950000))
                        caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
                                        SDHCI_SUPPORT_SDR50 |
                                        SDHCI_SUPPORT_DDR50);
+               if (ret) {
+                       pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
+                               mmc_hostname(mmc), ret);
+                       host->vqmmc = NULL;
+               }
        }
 
        if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)