mmc: move 'parent' tracking to mmc_blk_data

In preparation for the removal of 'driverfs_dev' from 'struct gendisk',
carry this data in mmc_blk_data. It is used for registration of parent
disks and partitions.

Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/mmc/card/block.c

@@ -93,6 +93,7 @@ static DEFINE_SPINLOCK(mmc_blk_lock);
  */
 struct mmc_blk_data {
 	spinlock_t	lock;
+	struct device	*parent;
 	struct gendisk	*disk;
 	struct mmc_queue queue;
 	struct list_head part;
@@ -2270,7 +2271,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	md->disk->fops = &mmc_bdops;
 	md->disk->private_data = md;
 	md->disk->queue = md->queue.queue;
-	md->disk->driverfs_dev = parent;
+	md->parent = parent;
 	set_disk_ro(md->disk, md->read_only || default_ro);
 	md->disk->flags = GENHD_FL_EXT_DEVT;
 	if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
@@ -2458,7 +2459,7 @@ static int mmc_add_disk(struct mmc_blk_data *md)
 	int ret;
 	struct mmc_card *card = md->queue.card;
 
-	add_disk(md->disk);
+	device_add_disk(md->parent, md->disk);
 	md->force_ro.show = force_ro_show;
 	md->force_ro.store = force_ro_store;
 	sysfs_attr_init(&md->force_ro.attr);