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hiddev: Return EPOLLOUT from hiddev_poll

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Always return EPOLLOUT from hiddev_poll when a device is connected.
This is safe since hiddev_write always fails and improves compatibility
with tools like socat.

Signed-off-by: Fabian Henneke <fabian@henneke.me>
In-reply-to: <nycvar.YFH.7.76.1907171333160.5899@cbobk.fhfr.pm>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Fabian Henneke 2019-07-18 22:50:58 +02:00 committed by Jiri Kosina
parent 378b80370a
commit c801aff1a5
1 changed files with 1 additions and 1 deletions
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2
drivers/hid/usbhid/hiddev.c
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@ -416,7 +416,7 @@ static __poll_t hiddev_poll(struct file *file, poll_table *wait)
poll_wait(file, &list->hiddev->wait, wait);
if (list->head != list->tail)
return EPOLLIN | EPOLLRDNORM;
return EPOLLIN | EPOLLRDNORM | EPOLLOUT;
if (!list->hiddev->exist)
return EPOLLERR | EPOLLHUP;
return 0;