[PATCH] mmc: sdhci: add error checking for mmc_add_host

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

Sometimes we can't add the device,but we didn't check any error status.
Need to check error status for mmc_add_host.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/mmc/host/sdhci.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 9e15f41..9c777bc 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2025,7 +2025,9 @@ int sdhci_add_host(struct sdhci_host *host)
 
 	mmiowb();
 
-	mmc_add_host(mmc);
+	ret = mmc_add_host(mmc);
+	if (unlikely(ret))
+		goto err_free_mmc;
 
 	printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s\n",
 		mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
@@ -2041,6 +2043,9 @@ reset:
 	sdhci_reset(host, SDHCI_RESET_ALL);
 	free_irq(host->irq, host);
 #endif
+err_free_mmc:
+	mmc_free_host(host);
+
 untasklet:
 	tasklet_kill(&host->card_tasklet);
 	tasklet_kill(&host->finish_tasklet);