From f3641c3abd1da978ee969b0203b71b86ec1bfa93 Mon Sep 17 00:00:00 2001
From: Tang Junhui <tang.junhui@zte.com.cn>
Date: Sun, 18 Mar 2018 17:36:21 -0700
Subject: [PATCH] bcache: fix error return value in memory shrink
Git-commit: f3641c3abd1da978ee969b0203b71b86ec1bfa93
Patch-mainline: v4.17-rc1
References: bsc#1093023

In bch_mca_scan(), the return value should not be the number of freed btree
nodes, but the number of pages of freed btree nodes.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/bcache/btree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 39cc8a549091..b2d4899f48d5 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -719,7 +719,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
 	}
 out:
 	mutex_unlock(&c->bucket_lock);
-	return freed;
+	return freed * c->btree_pages;
 }
 
 static unsigned long bch_mca_count(struct shrinker *shrink,
-- 
2.16.3