[PATCH v4 3/7] fuse: update stats for pages in dropped aux writeback list

[Joanne Koong <joannelkoong@gmail.com>]

In the case where the aux writeback list is dropped (eg the pages
have been truncated or the connection is broken), the stats for
its pages and backing device info need to be updated as well.

Fixes: e2653bd53a98 ("fuse: fix leaked aux requests")
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
---
 fs/fuse/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 320fa26b23e8..1ae58f93884e 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1837,10 +1837,11 @@ __acquires(fi->lock)
 	fuse_writepage_finish(wpa);
 	spin_unlock(&fi->lock);
 
-	/* After fuse_writepage_finish() aux request list is private */
+	/* After rb_erase() aux request list is private */
 	for (aux = wpa->next; aux; aux = next) {
 		next = aux->next;
 		aux->next = NULL;
+		fuse_writepage_finish_stat(aux->inode, aux->ia.ap.pages[0]);
 		fuse_writepage_free(aux);
 	}
 
-- 
2.43.5