[ Upstream commit 09b4195021be69af1e1936cca995712a6d0f2562 ] Error code is assigned to 'stat', return 'stat' rather than '-1'. Signed-off-by: Su Hui <suhui@nfschina.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Sasha Levin <sashal@kernel.org>