We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.

The caller cleanups the disk already so all we need to do
is just pass along the return value.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/mmc/core/block.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 4c11f171e56d..4f12c6d1e1b5 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c

@@ -2432,7 +2432,9 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	/* used in ->open, must be set before add_disk: */
 	if (area_type == MMC_BLK_DATA_AREA_MAIN)
 		dev_set_drvdata(&card->dev, md);
-	device_add_disk(md->parent, md->disk, mmc_disk_attr_groups);
+	ret = device_add_disk(md->parent, md->disk, mmc_disk_attr_groups);
+	if (ret)
+		goto out;