[PATCH] mmc: fixed wrong SD card detection

[Jaehoon Chung <jh80.chung@samsung.com>]

This patch added mmc_power_off after mmc_attach_sd()

i found that didn't detect the second card insert.(using SDHCI)
you can see the below log.

i want to know that somebody know this issue...

->first card inserted (correct card detect)
# mmc1: new SDHC card at address e624
mmcblk1: mmc1:e624 SU04G 3.69 GiB
 mmcblk1: p1
#
# mmc1: card e624 removed
-> second card inserted
mmc1: error -110 whilst initialising SD card
mmc1: Card removed during transfer!
mmc1: Resetting controller.
-> third card inserted 
mmc1: new SDHC card at address e624
mmcblk1: mmc1:e624 SU04G 3.69 GiB
 mmcblk1: p1

I added mmc_power_off() after only mmc_attach_sd().

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/mmc/core/core.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 1dbc185..d5d8ac0 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1522,8 +1522,10 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
 	/* Order's important: probe SDIO, then SD, then MMC */
 	if (!mmc_attach_sdio(host))
 		return 0;
-	if (!mmc_attach_sd(host))
+	if (!mmc_attach_sd(host)) {
+		mmc_power_off(host);
 		return 0;
+	}
 	if (!mmc_attach_mmc(host))
 		return 0;