mmc: tmio: fix compiler warning

This patch fixes a compiler warning:

drivers/mmc/host/tmio_mmc_pio.c: In function 'tmio_mmc_power_on':
drivers/mmc/host/tmio_mmc_pio.c:798:19: warning: ignoring return value of
'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index b72edb72f7d2..718843cfacfc 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -795,9 +795,13 @@ static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
          * omap_hsmmc.c driver does.
          */
         if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
-                regulator_enable(mmc->supply.vqmmc);
+                ret = regulator_enable(mmc->supply.vqmmc);
                 udelay(200);
         }
+
+        if (ret < 0)
+                dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
+                        ret);
 }
 
 static void tmio_mmc_power_off(struct tmio_mmc_host *host)