* [PATCH] block: ensure the extended dev_t gets free for hidden gendisks
@ 2021-12-22 9:31 Christoph Hellwig
0 siblings, 0 replies; only message in thread
From: Christoph Hellwig @ 2021-12-22 9:31 UTC (permalink / raw)
To: axboe; +Cc: linux-block
Manually set bd_bdev for hidden gendisk to ensure they are freed when the
whole device bdev inode is freed. For normal gendisks this is done by
bdev_add, which isn't called for hidden ones.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/genhd.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block/genhd.c b/block/genhd.c
index 626c8406f21a6..563fb84ff746f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -498,7 +498,10 @@ 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)) {
+ if (disk->flags & GENHD_FL_HIDDEN) {
+ /* needed so that the extended dev_t gets freed */
+ disk->part0->bd_dev = MKDEV(disk->major, disk->first_minor);
+ } else {
ret = bdi_register(disk->bdi, "%u:%u",
disk->major, disk->first_minor);
if (ret)
--
2.30.2
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2021-12-22 9:31 [PATCH] block: ensure the extended dev_t gets free for hidden gendisks Christoph Hellwig
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