fuse: don't ignore errors from fuse_writepages_fill()

[ Upstream commit 7779b047a57f6824a43d0e1f70de2741b7426b9d ]

fuse_writepages() ignores some errors taken from fuse_writepages_fill() I
believe it is a bug: if .writepages is called with WB_SYNC_ALL it should
either guarantee that all data was successfully saved or return error.

Fixes: 26d614df1da9 ("fuse: Implement writepages callback")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 66214707a9456fda260fbcd2d108ca7547206272..d5963ef65c389355550fd0df13d0b3909728dcb6 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2148,10 +2148,8 @@ static int fuse_writepages(struct address_space *mapping,
 
        err = write_cache_pages(mapping, wbc, fuse_writepages_fill, &data);
        if (data.wpa) {
-               /* Ignore errors if we can write at least one page */
                WARN_ON(!data.wpa->ia.ap.num_pages);
                fuse_writepages_send(&data);
-               err = 0;
        }
        if (data.ff)
                fuse_file_put(data.ff, false, false);