diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 2c7f412df2eb..67afb9557c9d 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1644,11 +1644,6 @@ static const struct attribute_group zram_disk_attr_group = { .attrs = zram_disk_attrs, }; -static const struct attribute_group *zram_disk_attr_groups[] = { - &zram_disk_attr_group, - NULL, -}; - /* * Allocate and initialize new zram device. the function returns * '>= 0' device_id upon success, and negative value otherwise. @@ -1729,15 +1724,24 @@ static int zram_add(void) zram->disk->queue->backing_dev_info->capabilities |= (BDI_CAP_STABLE_WRITES | BDI_CAP_SYNCHRONOUS_IO); - disk_to_dev(zram->disk)->groups = zram_disk_attr_groups; add_disk(zram->disk); + ret = sysfs_create_group(&disk_to_dev(zram->disk)->kobj, + &zram_disk_attr_group); + if (ret < 0) { + pr_err("Error creating sysfs group for device %d\n", + device_id); + goto out_free_disk; + } strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor)); zram_debugfs_register(zram); pr_info("Added device: %s\n", zram->disk->disk_name); return device_id; +out_free_disk: + del_gendisk(zram->disk); + put_disk(zram->disk); out_free_queue: blk_cleanup_queue(queue); out_free_idr: @@ -1766,6 +1770,16 @@ static int zram_remove(struct zram *zram) mutex_unlock(&bdev->bd_mutex); zram_debugfs_unregister(zram); + /* + * Remove sysfs first, so no one will perform a disksize + * store while we destroy the devices. This also helps during + * hot_remove -- zram_reset_device() is the last holder of + * ->init_lock, no later/concurrent disksize_store() or any + * other sysfs handlers are possible. + */ + sysfs_remove_group(&disk_to_dev(zram->disk)->kobj, + &zram_disk_attr_group); + /* Make sure all the pending I/O are finished */ fsync_bdev(bdev); zram_reset_device(zram); |