diff options
| author | Kent Overstreet <kmo@daterainc.com> | 2013-07-10 21:25:02 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-28 16:30:10 -0700 |
| commit | fe1b710530e60c8fbb07a73ad27e9f65305ce06a (patch) | |
| tree | 916fed1e78bcabcb945a0e960508a97d6e7227b4 | |
| parent | 63a53870bb23c2d991f378ae9137d775978d5ae9 (diff) | |
bcache: Fix a sysfs splat on shutdown
commit c9502ea4424b31728703d113fc6b30bfead14633 upstream.
If we stopped a bcache device when we were already detaching (or
something like that), bcache_device_unlink() would try to remove a
symlink from sysfs that was already gone because the bcache dev kobject
had already been removed from sysfs.
So keep track of whether we've removed stuff from sysfs.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/bcache/bcache.h | 1 | ||||
| -rw-r--r-- | drivers/md/bcache/super.c | 11 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index d3e15b42a4a..c42b14b2304 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -437,6 +437,7 @@ struct bcache_device { /* If nonzero, we're detaching/unregistering from cache set */ atomic_t detaching; + int flush_done; atomic_long_t sectors_dirty; unsigned long sectors_dirty_gc; diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 88113fe57fe..b4713cea191 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -704,7 +704,8 @@ static void bcache_device_detach(struct bcache_device *d) atomic_set(&d->detaching, 0); } - bcache_device_unlink(d); + if (!d->flush_done) + bcache_device_unlink(d); d->c->devices[d->id] = NULL; closure_put(&d->c->caching); @@ -1016,6 +1017,14 @@ static void cached_dev_flush(struct closure *cl) struct cached_dev *dc = container_of(cl, struct cached_dev, disk.cl); struct bcache_device *d = &dc->disk; + mutex_lock(&bch_register_lock); + d->flush_done = 1; + + if (d->c) + bcache_device_unlink(d); + + mutex_unlock(&bch_register_lock); + bch_cache_accounting_destroy(&dc->accounting); kobject_del(&d->kobj); |