| From f93faa310cf3da0d54ee2232a76729b2063cc551 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Date: Fri, 25 Jan 2019 15:13:58 +0100 |
| Subject: [PATCH 02/15] tty: n_r3964: fix poll return value |
| |
| -EINVAL is not a valid __poll_t return value for when an error happens. |
| Instead, set return EPOLLNVAL | EPOLLERR to tell userspace that what it |
| wanted to have happen did not. |
| |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/tty/n_r3964.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/tty/n_r3964.c |
| +++ b/drivers/tty/n_r3964.c |
| @@ -1286,7 +1286,7 @@ static __poll_t r3964_poll(struct tty_st |
| if (pMsg) |
| result |= EPOLLIN | EPOLLRDNORM; |
| } else { |
| - result = -EINVAL; |
| + result = EPOLLNVAL | EPOLLERR; |
| } |
| return result; |
| } |
