From: Christoph Hellwig hch@lst.de
mainline inclusion from mainline-v5.15-rc1 commit 52b85909f85d06efa69aaf4210e72467f1f58d2b category: bugfix bugzilla: 188733, https://gitee.com/openeuler/kernel/issues/I81XCK
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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There is no real reason these should be separate. Also simplify the groups assignment a bit.
Signed-off-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/20210818144542.19305-3-hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk conflict: block/genhd.c Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com --- block/genhd.c | 97 +++++++++++++++++++++++---------------------------- 1 file changed, 44 insertions(+), 53 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c index 83f407e1563a..aef153a824a4 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -687,55 +687,6 @@ static int exact_lock(dev_t devt, void *data) return 0; }
-static void register_disk(struct device *parent, struct gendisk *disk, - const struct attribute_group **groups) -{ - struct device *ddev = disk_to_dev(disk); - int err; - - ddev->parent = parent; - - dev_set_name(ddev, "%s", disk->disk_name); - - /* delay uevents, until we scanned partition table */ - dev_set_uevent_suppress(ddev, 1); - - if (groups) { - WARN_ON(ddev->groups); - ddev->groups = groups; - } - if (device_add(ddev)) - return; - if (!sysfs_deprecated) { - err = sysfs_create_link(block_depr, &ddev->kobj, - kobject_name(&ddev->kobj)); - if (err) { - device_del(ddev); - return; - } - } - - /* - * avoid probable deadlock caused by allocating memory with - * GFP_KERNEL in runtime_resume callback of its all ancestor - * devices - */ - pm_runtime_set_memalloc_noio(ddev, true); - - disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj); - disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj); - - if (disk->flags & GENHD_FL_HIDDEN) - return; - - if (disk->queue->backing_dev_info->dev) { - err = sysfs_create_link(&ddev->kobj, - &disk->queue->backing_dev_info->dev->kobj, - "bdi"); - WARN_ON(err); - } -} - int disk_scan_partitions(struct gendisk *disk, fmode_t mode) { struct block_device *bdev; @@ -820,6 +771,7 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk, const struct attribute_group **groups, bool register_queue) { + struct device *ddev = disk_to_dev(disk); dev_t devt; int retval;
@@ -859,18 +811,57 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk, disk->flags |= GENHD_FL_NO_PART_SCAN; } else { struct backing_dev_info *bdi = disk->queue->backing_dev_info; - struct device *dev = disk_to_dev(disk); int ret;
/* Register BDI before referencing it from bdev */ - dev->devt = devt; + ddev->devt = devt; ret = bdi_register(bdi, "%u:%u", MAJOR(devt), MINOR(devt)); WARN_ON(ret); - bdi_set_owner(bdi, dev); + bdi_set_owner(bdi, ddev); blk_register_region(disk_devt(disk), disk->minors, NULL, exact_match, exact_lock, disk); } - register_disk(parent, disk, groups); + + /* delay uevents, until we scanned partition table */ + dev_set_uevent_suppress(ddev, 1); + + ddev->parent = parent; + if (groups) { + WARN_ON(ddev->groups); + ddev->groups = groups; + } + dev_set_name(ddev, "%s", disk->disk_name); + if (device_add(ddev)) + return; + if (!sysfs_deprecated) { + retval = sysfs_create_link(block_depr, &ddev->kobj, + kobject_name(&ddev->kobj)); + if (retval) { + device_del(ddev); + return; + } + } + + /* + * avoid probable deadlock caused by allocating memory with + * GFP_KERNEL in runtime_resume callback of its all ancestor + * devices + */ + pm_runtime_set_memalloc_noio(ddev, true); + + disk->part0.holder_dir = + kobject_create_and_add("holders", &ddev->kobj); + disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj); + + if (!(disk->flags & GENHD_FL_HIDDEN)) { + if (disk->queue->backing_dev_info->dev) { + retval = sysfs_create_link(&ddev->kobj, + &disk->queue->backing_dev_info->dev->kobj, + "bdi"); + WARN_ON(retval); + } + } + if (register_queue) blk_register_queue(disk);