check the result of mmc_add_host() and return the value.

Signed-off-by: Jaehoon Chung <jh80.ch...@samsung.com>
---
 drivers/mmc/host/dw_mmc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 60063cc..e481d90 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1990,7 +1990,9 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned 
int id)
 
        slot->wp_gpio = dw_mci_of_get_wp_gpio(host->dev, slot->id);
 
-       mmc_add_host(mmc);
+       ret = mmc_add_host(mmc);
+       if (ret)
+               goto err_setup_bus;
 
 #if defined(CONFIG_DEBUG_FS)
        dw_mci_init_debugfs(slot);
-- 
1.7.9.5
--
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