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block: add helper add_disk_final() 

Add helper add_disk_final() for scanning partitions, announcing disk and
handling the last thing for adding disk.

No functional change, and prepare for prevent adding disk from happening
when updating nr_hw_queues.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250505141805.2751237-8-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2025-05-05 22:17:45 +08:00 committed by Jens Axboe
parent 92c22d7efc
commit 5fad1490ef
1 changed files with 27 additions and 19 deletions
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46
block/genhd.c
View File

@ -389,6 +389,32 @@ int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode)
return ret;
}
static void add_disk_final(struct gendisk *disk)
{
struct device *ddev = disk_to_dev(disk);
if (!(disk->flags & GENHD_FL_HIDDEN)) {
/* Make sure the first partition scan will be proceed */
if (get_capacity(disk) && disk_has_partscan(disk))
set_bit(GD_NEED_PART_SCAN, &disk->state);
bdev_add(disk->part0, ddev->devt);
if (get_capacity(disk))
disk_scan_partitions(disk, BLK_OPEN_READ);
/*
* Announce the disk and partitions after all partitions are
* created. (for hidden disks uevents remain suppressed forever)
*/
dev_set_uevent_suppress(ddev, 0);
disk_uevent(disk, KOBJ_ADD);
}
blk_apply_bdi_limits(disk->bdi, &disk->queue->limits);
disk_add_events(disk);
set_bit(GD_ADDED, &disk->state);
}
/**
* add_disk_fwnode - add disk information to kernel list with fwnode
* @parent: parent device for the disk
@ -516,21 +542,6 @@ int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
&disk->bdi->dev->kobj, "bdi");
if (ret)
goto out_unregister_bdi;
/* Make sure the first partition scan will be proceed */
if (get_capacity(disk) && disk_has_partscan(disk))
set_bit(GD_NEED_PART_SCAN, &disk->state);
bdev_add(disk->part0, ddev->devt);
if (get_capacity(disk))
disk_scan_partitions(disk, BLK_OPEN_READ);
/*
* Announce the disk and partitions after all partitions are
* created. (for hidden disks uevents remain suppressed forever)
*/
dev_set_uevent_suppress(ddev, 0);
disk_uevent(disk, KOBJ_ADD);
} else {
/*
* Even if the block_device for a hidden gendisk is not
@ -539,10 +550,7 @@ int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
*/
disk->part0->bd_dev = MKDEV(disk->major, disk->first_minor);
}
blk_apply_bdi_limits(disk->bdi, &disk->queue->limits);
disk_add_events(disk);
set_bit(GD_ADDED, &disk->state);
add_disk_final(disk);
return 0;
out_unregister_bdi: