[PATCH AUTOSEL 4.19 146/209] bcache: recal cached_dev_sectors on detach

[Sasha Levin <sashal@kernel.org>]

From: Shenghui Wang <shhuiw@foxmail.com>

[ Upstream commit 46010141da6677b81cc77f9b47f8ac62bd1cbfd3 ]

Recal cached_dev_sectors on cached_dev detached, as recal done on
cached_dev attached.

Update the cached_dev_sectors before bcache_device_detach called
as bcache_device_detach will set bcache_device->c to NULL.

Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/md/bcache/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index c4da2fe623e9e..4998b4cae9c11 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1009,6 +1009,7 @@ static void cached_dev_detach_finish(struct work_struct *w)
 	bch_write_bdev_super(dc, &cl);
 	closure_sync(&cl);
 
+	calc_cached_dev_sectors(dc->disk.c);
 	bcache_device_detach(&dc->disk);
 	list_move(&dc->list, &uncached_devices);
 
-- 
2.20.1