erofs: correct the remaining shrink objects

commit 9d5a09c6f3b5fb85af20e3a34827b5d27d152b34 upstream.

The remaining count should not include successful
shrink attempts.

Fixes: e7e9a307be9d ("staging: erofs: introduce workstation for decompression")
Cc: <stable@vger.kernel.org> # 4.19+
Link: https://lore.kernel.org/r/20200226081008.86348-1-gaoxiang25@huawei.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/erofs/utils.c b/drivers/staging/erofs/utils.c
index 2d96820da62ecb3e3ad94d9a90cd7a1a9c997749..4de9c39535eb9e0a1275518a703d7beb6812dafd 100644 (file)
--- a/drivers/staging/erofs/utils.c
+++ b/drivers/staging/erofs/utils.c
@@ -309,7 +309,7 @@ unsigned long erofs_shrink_scan(struct shrinker *shrink,
                sbi->shrinker_run_no = run_no;
 
 #ifdef CONFIG_EROFS_FS_ZIP
-               freed += erofs_shrink_workstation(sbi, nr, false);
+               freed += erofs_shrink_workstation(sbi, nr - freed, false);
 #endif
 
                spin_lock(&erofs_sb_list_lock);