diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-02-15 10:45:10 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-02-17 03:44:24 +0100 |
| commit | 76792055c4c8b2472ca1ae48e0ddaf8497529f08 (patch) | |
| tree | d46b30e52e66b4f27ccb9c06a9cedf3d83abf546 /block/genhd.c | |
| parent | block: revert 4f1e9630afe6 ("blk-throtl: optimize IOPS throttle for large IO ... (diff) | |
| download | linux-76792055c4c8b2472ca1ae48e0ddaf8497529f08.tar.xz linux-76792055c4c8b2472ca1ae48e0ddaf8497529f08.zip | |
block: add a ->free_disk method
Add a method to notify the driver that the gendisk is about to be freed.
This allows drivers to tie the lifetime of their private data to that of
the gendisk and thus deal with device removal races without expensive
synchronization and boilerplate code.
A new flag is added so that ->free_disk is only called after a successful
call to add_disk, which significantly simplifies the error handling path
during probing.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220215094514.3828912-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index 9589d1d59afa..e351fac41bf2 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -526,6 +526,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk, disk_update_readahead(disk); disk_add_events(disk); + set_bit(GD_ADDED, &disk->state); return 0; out_unregister_bdi: @@ -1119,6 +1120,10 @@ static void disk_release(struct device *dev) xa_destroy(&disk->part_tbl); disk->queue->disk = NULL; blk_put_queue(disk->queue); + + if (test_bit(GD_ADDED, &disk->state) && disk->fops->free_disk) + disk->fops->free_disk(disk); + iput(disk->part0->bd_inode); /* frees the disk */ } |