diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b1e209f479adf0fc859349be2686e957c685b967..cbb23215ad87bd9e441e5b208949a7a203a2d223 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2482,6 +2482,7 @@ void mmc_start_host(struct mmc_host *host)
 {
 	host->f_init = max(freqs[0], host->f_min);
 	host->rescan_disable = 0;
+	host->ios.power_mode = MMC_POWER_UNDEFINED;
 	if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)
 		mmc_power_off(host);
 	else
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 797ae657dc3db6b0d7e51430b0cf0a0cf1bb2cd5..df0c15396bbfcce6c01eabe49778c4584d4b2d69 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -42,6 +42,7 @@ struct mmc_ios {
 #define MMC_POWER_OFF		0
 #define MMC_POWER_UP		1
 #define MMC_POWER_ON		2
+#define MMC_POWER_UNDEFINED	3
 
 	unsigned char	bus_width;		/* data bus width */