diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 86dbb36..6986f39 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -103,8 +103,10 @@
 			check_disk_change(inode->i_bdev);
 		ret = 0;
 
-		if ((filp->f_mode & FMODE_WRITE) && md->read_only)
+		if ((filp->f_mode & FMODE_WRITE) && md->read_only) {
+			mmc_blk_put(md);
 			ret = -EROFS;
+		}
 	}
 
 	return ret;