diff options
| author | Kent Overstreet <kmo@daterainc.com> | 2013-07-11 06:25:02 +0200 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2013-07-12 09:22:47 +0200 |
| commit | c9502ea4424b31728703d113fc6b30bfead14633 (patch) | |
| tree | 5ce21818de392f7873708f8db65b031223b04c2e /drivers/md | |
| parent | bcache: Advertise that flushes are supported (diff) | |
| download | linux-c9502ea4424b31728703d113fc6b30bfead14633.tar.xz linux-c9502ea4424b31728703d113fc6b30bfead14633.zip | |
bcache: Fix a sysfs splat on shutdown
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>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
Diffstat (limited to 'drivers/md')
| -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 342ba86c6e4f..68f1ded81ae0 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -434,6 +434,7 @@ struct bcache_device { /* If nonzero, we're detaching/unregistering from cache set */ atomic_t detaching; + int flush_done; uint64_t nr_stripes; unsigned stripe_size_bits; diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 728fdc673f31..7a1dcdb2536e 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -706,7 +706,8 @@ 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); @@ -1055,6 +1056,14 @@ 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); |