libnvdimm, {btt, blk}: do integrity setup before add_disk()

commit 3ffb0ba9b567a8efb9a04ed3d1ec15ff333ada22 upstream.

Prior to 25520d55cdb6 ("block: Inline blk_integrity in struct gendisk")
we needed to temporarily add a zero-capacity disk before registering for
blk-integrity. But adding a zero-capacity disk caused the partition
table scanning to bail early, and this resulted in partitions not coming
up after a probe of the BTT or blk namespaces.

We can now register for integrity before the disk has been added, and
this fixes the rescan problems.

Fixes: 25520d55cdb6 ("block: Inline blk_integrity in struct gendisk")
Reported-by: Dariusz Dokupil <dariusz.dokupil@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 345acca..1bd7b37 100644 (file)
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -278,8 +278,6 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
        disk->queue             = q;
        disk->flags             = GENHD_FL_EXT_DEVT;
        nvdimm_namespace_disk_name(&nsblk->common, disk->disk_name);
-       set_capacity(disk, 0);
-       device_add_disk(dev, disk);
 
        if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))
                return -ENOMEM;
@@ -292,6 +290,7 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
        }
 
        set_capacity(disk, available_disk_size >> SECTOR_SHIFT);
+       device_add_disk(dev, disk);
        revalidate_disk(disk);
        return 0;
 }

diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 09428eb..b2feda3 100644 (file)
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1542,8 +1542,6 @@ static int btt_blk_init(struct btt *btt)
        queue_flag_set_unlocked(QUEUE_FLAG_NONROT, btt->btt_queue);
        btt->btt_queue->queuedata = btt;
 
-       set_capacity(btt->btt_disk, 0);
-       device_add_disk(&btt->nd_btt->dev, btt->btt_disk);
        if (btt_meta_size(btt)) {
                int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
 
@@ -1555,6 +1553,7 @@ static int btt_blk_init(struct btt *btt)
                }
        }
        set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
+       device_add_disk(&btt->nd_btt->dev, btt->btt_disk);
        btt->nd_btt->size = btt->nlba * (u64)btt->sector_size;
        revalidate_disk(btt->btt_disk);