diff options
| -rw-r--r-- | drivers/md/dm-sysfs.c | 10 | ||||
| -rw-r--r-- | drivers/md/dm.c | 11 | ||||
| -rw-r--r-- | drivers/md/dm.h | 2 |
3 files changed, 22 insertions, 1 deletions
diff --git a/drivers/md/dm-sysfs.c b/drivers/md/dm-sysfs.c index 84d2b91..e0cc5d6 100644 --- a/drivers/md/dm-sysfs.c +++ b/drivers/md/dm-sysfs.c @@ -79,6 +79,11 @@ static const struct sysfs_ops dm_sysfs_ops = { .show = dm_attr_show, }; +static void dm_kobject_release(struct kobject *kobj) +{ + complete(dm_get_completion_from_kobject(kobj)); +} + /* * dm kobject is embedded in mapped_device structure * no need to define release function here @@ -86,6 +91,7 @@ static const struct sysfs_ops dm_sysfs_ops = { static struct kobj_type dm_ktype = { .sysfs_ops = &dm_sysfs_ops, .default_attrs = dm_attrs, + .release = dm_kobject_release, }; /* @@ -104,5 +110,7 @@ int dm_sysfs_init(struct mapped_device *md) */ void dm_sysfs_exit(struct mapped_device *md) { - kobject_put(dm_kobject(md)); + struct kobject *kobj = dm_kobject(md); + kobject_put(kobj); + wait_for_completion(dm_get_completion_from_kobject(kobj)); } diff --git a/drivers/md/dm.c b/drivers/md/dm.c index b3e26c7..c157959 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -197,6 +197,9 @@ struct mapped_device { /* sysfs handle */ struct kobject kobj; + /* wait until the kobject is released */ + struct completion kobj_completion; + /* zero-length flush that will be cloned and submitted to targets */ struct bio flush_bio; @@ -2005,6 +2008,7 @@ static struct mapped_device *alloc_dev(int minor) init_waitqueue_head(&md->wait); INIT_WORK(&md->work, dm_wq_work); init_waitqueue_head(&md->eventq); + init_completion(&md->kobj_completion); md->disk->major = _major; md->disk->first_minor = minor; @@ -2889,6 +2893,13 @@ struct mapped_device *dm_get_from_kobject(struct kobject *kobj) return md; } +struct completion *dm_get_completion_from_kobject(struct kobject *kobj) +{ + struct mapped_device *md = container_of(kobj, struct mapped_device, kobj); + + return &md->kobj_completion; +} + int dm_suspended_md(struct mapped_device *md) { return test_bit(DMF_SUSPENDED, &md->flags); diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 1d1ad7b..a3406e0 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -15,6 +15,7 @@ #include <linux/list.h> #include <linux/blkdev.h> #include <linux/hdreg.h> +#include <linux/completion.h> #include "dm-stats.h" @@ -142,6 +143,7 @@ int dm_sysfs_init(struct mapped_device *md); void dm_sysfs_exit(struct mapped_device *md); struct kobject *dm_kobject(struct mapped_device *md); struct mapped_device *dm_get_from_kobject(struct kobject *kobj); +struct completion *dm_get_completion_from_kobject(struct kobject *kobj); /* * Targets for linear and striped mappings |