There was a hardcoded value of 4096 which should have been N_TTY_BUF_SIZE. This caused reads from tty to fail with EFAULT when they shouldn't have done if N_TTY_BUF_SIZE was declared to be something other than 4096. Signed-off-by: Mark Tomlinson <mark.tomlinson@xxxxxxxxxxxxxxxxxxx> --- drivers/tty/n_tty.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index cf6e0f2..5b35537 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -2058,8 +2058,8 @@ static int canon_copy_from_read_buf(struct tty_struct *tty, size = N_TTY_BUF_SIZE - tail; n = eol - tail; - if (n > 4096) - n += 4096; + if (n > N_TTY_BUF_SIZE) + n += N_TTY_BUF_SIZE; n += found; c = n; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
