mmc: dw_mmc: fix the debug message for checking card's present

If display the debug message, this message should be spamming.
If flags is maintained the previous value, didn't display the debug
message.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 3cf2490b16bd89486dd5dccb59733e936e39ce19..441ca447c4ba5832c5d69f4666e7ec8d491d9388 100644 (file)
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1538,13 +1538,10 @@ static int dw_mci_get_cd(struct mmc_host *mmc)
                        == 0 ? 1 : 0;
 
        spin_lock_bh(&host->lock);
-       if (present) {
-               set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
+       if (present && !test_and_set_bit(DW_MMC_CARD_PRESENT, &slot->flags))
                dev_dbg(&mmc->class_dev, "card is present\n");
-       } else {
-               clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
+       else if (!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);
 
        return present;