[PATCH 12/14] block: don't set GENHD_FL_NO_PART for hidden gendisks

Christoph Hellwig
2021-11-22T13:06:48Z

Hidden gendisks can't be opened using blkdev_get_*, so we can't really
reach any of the partition scanning paths or partitioning ioctls except
for the initial partition scan from add_disk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/genhd.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index e9346fae48ad4..b1c194813e22f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -376,7 +376,7 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
{
struct block_device *bdev;

- if (disk->flags & GENHD_FL_NO_PART)
+ if (disk->flags & (GENHD_FL_NO_PART | GENHD_FL_HIDDEN))
return -EINVAL;
if (disk->open_partitions)
return -EBUSY;
@@ -493,12 +493,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
if (ret)
goto out_put_slave_dir;

- if (disk->flags & GENHD_FL_HIDDEN) {
- /*
- * Don't bother scanning for partitions.
- */
- disk->flags |= GENHD_FL_NO_PART;
- } else {
+ if (!(disk->flags & GENHD_FL_HIDDEN)) {
ret = bdi_register(disk->bdi, "%u:%u",
disk->major, disk->first_minor);
if (ret)
--
2.30.2