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vcs: make proper usage of the poll flags 

Kay Sievers pointed out that usage of POLLIN is well defined by POSIX,
and the current usage here doesn't follow that definition.  So let's
duplicate the same semantics as implemented by sysfs_poll() instead.

Signed-off-by: Nicolas Pitre <nicolas.pitre@canonical.com>
Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Nicolas Pitre 2010-11-10 01:33:12 -05:00 committed by Greg Kroah-Hartman
parent 37db8f91b7
commit 47c344d0bd
1 changed files with 3 additions and 3 deletions
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6
drivers/tty/vt/vc_screen.c
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@ -553,12 +553,12 @@ static unsigned int
vcs_poll(struct file *file, poll_table *wait)
{
struct vcs_poll_data *poll = vcs_poll_data_get(file);
int ret = 0;
int ret = DEFAULT_POLLMASK|POLLERR|POLLPRI;
if (poll) {
poll_wait(file, &poll->waitq, wait);
if (!poll->seen_last_update)
ret = POLLIN | POLLRDNORM;
if (poll->seen_last_update)
ret = DEFAULT_POLLMASK;
}
return ret;
}