From 46010141da6677b81cc77f9b47f8ac62bd1cbfd3 Mon Sep 17 00:00:00 2001
From: Shenghui Wang <shhuiw@foxmail.com>
Date: Mon, 8 Oct 2018 20:41:15 +0800
Subject: [PATCH] bcache: recal cached_dev_sectors on detach
Git-commit: 46010141da6677b81cc77f9b47f8ac62bd1cbfd3
Patch-mainline: v4.20-rc1
References: bsc#1130972

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>

---
 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 c116b6e0d85a..1155bd823b6f 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);
 
-- 
2.16.4