mmc: dw_mmc: check the "present" variable before checking flags

Before checking flags, it has to check "present" variable.
Otherwise, flags should be cleared everytime.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/dw_mmc.c

@@ -1536,7 +1536,8 @@ static int dw_mci_get_cd(struct mmc_host *mmc)
 	spin_lock_bh(&host->lock);
 	if (present && !test_and_set_bit(DW_MMC_CARD_PRESENT, &slot->flags))
 		dev_dbg(&mmc->class_dev, "card is present\n");
-	else if (!test_and_clear_bit(DW_MMC_CARD_PRESENT, &slot->flags))
+	else if (!present &&
+			!test_and_clear_bit(DW_MMC_CARD_PRESENT, &slot->flags))
 		dev_dbg(&mmc->class_dev, "card is not present\n");
 	spin_unlock_bh(&host->lock);