From: Shenghui Wang <shhuiw@foxmail.com>
Date: Mon, 8 Oct 2018 12:41:15 +0000 (+0800)
Subject: bcache: recal cached_dev_sectors on detach
X-Git-Tag: v4.20-rc1~191^2~101
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46010141da6677b81cc77f9b47f8ac62bd1cbfd3;p=thirdparty%2Fkernel%2Flinux.git

bcache: recal cached_dev_sectors on detach

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>
---

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index c116b6e0d85aa..1155bd823b6f9 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);