[ Upstream commitd8bde3bf7f
] Then the input contains '\0' or '\n', proc_mpc_write has read them, so the return value needs +1. Fixes:1da177e4c3
("Linux-2.6.12-rc2") Signed-off-by: Xiaobo Liu <cppcoffee@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>