[PATCH 3.16 074/245] HID: uhid: Fix returning EPOLLOUT from uhid_char_poll

Ben Hutchings
2020-04-23T23:20:03Z

From: Marcel Holtmann <marcel@holtmann.org>

commit be54e7461ffdc5809b67d2aeefc1ddc9a91470c7 upstream.

Always return EPOLLOUT from uhid_char_poll to allow polling /dev/uhid
for writable state.

Fixes: 1f9dec1e0164 ("HID: uhid: allow poll()'ing on uhid devices")
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
[bwh: Backported to 3.16: s/EPOLL/POLL/g]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/hid/uhid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -726,7 +726,7 @@ static unsigned int uhid_char_poll(struc
if (uhid->head != uhid->tail)
return POLLIN | POLLRDNORM;

- return 0;
+ return POLLOUT | POLLWRNORM;
}

static const struct file_operations uhid_fops = {