[ Upstream commit 24a025497e7e883bd2adef5d0ece1e9b9268009f ] Cocinnele reports a warning WARNING: Suspicious code. resource_size is maybe missing with root The root cause is the function resource_size is not used when needed Use resource_size() on variable "root" of type resource Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Sasha Levin <sashal@kernel.org>