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
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 342ba86..68f1ded 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -434,6 +434,7 @@
/* If nonzero, we're detaching/unregistering from cache set */
atomic_t detaching;
+ int flush_done;
uint64_t nr_stripes;
unsigned stripe_size_bits;